Designation: A53/A53M − 12

Standard Specification for

Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and
Seamless1
This standard is issued under the fixed designation A53/A53M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 1.3.1 Type F is not intended for flanging.
2
1.1 This specification covers seamless and
welded black and hot-dipped galvanized steel
pipe in NPS 1⁄8 to NPS 26 [DN 6 to DN 650] 1.3.2 If Type S or Type E is required for close
(Note 1), inclusive, with nominal wall thickness coiling or cold bending, Grade A is the
(Note 2) as given in Table X2.2 and Table X2.3. preferred grade; however, this is not intended to
It shall be permissible to furnish pipe having prohibit the cold bending of Grade B pipe.
other dimensions provided that such pipe 1.3.3 Type E is furnished either nonexpanded
complies with all other requirements of this or cold expanded at the option of the
specification. Supplementary requirements of an manufacturer.
optional nature are provided and shall apply 1.4 The values stated in either SI units or
only when specified by the purchaser. inch-pound units are to be regarded separately
NOTE 1—The dimensionless designators NPS (nominal as standard. The values stated in each system
pipe size) [DN (diameter nominal)] have been may not be exact equivalents; therefore, each
substituted in this specification for such traditional terms system shall be used independently of the other.
as “nominal diameter,” “size,” and “nominal size.” Combining values from the two systems may
NOTE 2—The term nominal wall thickness has been
assigned for the purpose of convenient designation,
result in non-conformance with the standard.
existing in name only, and is used to distinguish it from 1.5 The following precautionary caveat
the actual wall thickness, which may vary over or under pertains only to the test method portion,
the nominal wall thickness.
Sections 7, 8, 9, 13, 14, and 15 of this
1.2 This specification covers the following specification: This standard does not purport to
types and grades: address all of the safety concerns, if any,
1.2.1 Type F—Furnace-butt-welded, associated with its use. It is the responsibility of
continuous welded Grade A, the user of this standard to establish
1.2.2 Type E—Electric-resistance-welded, appropriate safety and health practices and
Grades A and B, and determine the applicability of regulatory
1.2.3 Type S—Seamless, Grades A and B. requirements prior to use.
NOTE 3—See Appendix X1 for definitions of types of 1.6 The text of this specification contains
pipe. notes or footnotes, or both, that provide
explanatory material. Such notes and footnotes,
1.3 Pipe ordered under this specification is excluding those in tables and figures, do not
intended for mechanical and pressure contain any mandatory requirements.
applications and is also acceptable for ordinary
uses in steam, water, gas, and air lines. It is 2. Referenced Documents
suitable for welding, and suitable for forming
operations involving coiling, bending, and 2.1 ASTM Standards:3
flanging, subject to the following qualifications:

1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,

2 For ASME Boiler and Pressure Vessel Code applications, see related Specification SA-53 in Section II of that code.
3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at
service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the
ASTM website.
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 A53/A53M − 12
A90/A90M Test Method for A530/A530M Specification for General
Weight [Mass] of Coating on Requirements for Specialized Carbon and
Iron and Steel Articles with Zinc or Zinc-Alloy Alloy Steel Pipe
Coatings A700 Practices for Packaging, Marking, and
A370 Test Methods and Definitions for Loading Meth-
Mechanical Testing of Steel Products
ods for Steel Products for Shipment
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.09 on Carbon Steel Tubular Products.
Current edition approved March 1, 2012. Published April 2012. Originally approved in 1915. Last previous edition approved in
2010 as A53/A53M–10. DOI: 10.1520/A0053_A0053M-12.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A865 Specification for Threaded Couplings, Fed. Std. No. 123 Marking for Shipment
Steel, Black or Zinc-Coated (Galvanized) (Civil Agencies)7
Welded or Seamless, for Use in Fed. Std. No. 183 Continuous Identification
Steel Pipe Joints Marking of Iron and Steel Products7
B6 Specification for Zinc 2.6 API Standard:
E29 Practice for Using Significant Digits in 5B Specification for Threading, Gauging, and
Test Data to Determine Conformance with Thread Inspection of Casing, Tubing, and
Specifications Line Pipe Threads7
E213 Practice for Ultrasonic Testing of Metal
Pipe and Tubing 3. Ordering Information
E273 Practice for Ultrasonic Testing of the
3.1 Information items to be considered, if
Weld Zone of Welded Pipe and Tubing
appropriate, for inclusion in the purchase order
E309 Practice for Eddy-Current Examination
are as follows:
of Steel Tubular Products Using Magnetic
3.1.1 Specification designation (A53 or
Saturation
A53M, including
E570 Practice for Flux Leakage Examination
year-date),
of Ferromagnetic Steel Tubular Products
3.1.2 Quantity (feet, metres, or number of
E1806 Practice for Sampling Steel and Iron
lengths),
for Determination of Chemical
Composition 3.1.3 Grade (A or B),
2.2 ANSI Standards: 3.1.4 Type (F, E, or S; see 1.2),
ASC X124 3.1.5 Finish (black or galvanized),
3.1.6 Size (either nominal (NPS) [DN] and
B1.20.1 Pipe Threads,
weight class or schedule number, or both; or
General Purpose4 2.3 ASME outside diameter and wall thickness, see Table
Standard: X2.2 and Table X2.3),
B36.10M Welded and Seamless Wrought 3.1.7 Length (specific or random, see Section
Steel Pipe52.4 Military Standards: 16),
3.1.8 End finish (plain end or threaded,
MIL-STD-129 Marking for Shipment and Section 11),
Storage6
3.1.8.1 Threaded and coupled, if desired,
MIL-STD-163 Steel Mill Products 3.1.8.2 Threads only (no couplings), if
Preparation for Shipment and Storage6 desired,
2.5 Federal Standards:
4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036,
http://www.ansi.org.
5 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave.,
New York, NY 10016-5990, http:// www.asme.org.
6 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098 7 Available from General Services Administration, Washington,
DC 20405.
7 Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http://api-ec.api.org.

2
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 A53/A53M − 12
3.1.8.3 Plain end, if desired, 4.2 If steels of different grades are
3.1.8.4 Couplings power tight, if desired, sequentially strand cast, identification of the
3.1.8.5 Taper-tapped couplings for NPS 2 resultant transition material is required. The
[DN 50] and steel producer shall remove the transition
smaller, if desired, material by any established procedure that
3.1.9 Close coiling, if desired (see 7.2.2), positively separates the grades.
3.1.10 Nondestructive electric test for 4.3 The weld seam of electric-resistance
seamless pipe (see welded pipe in Grade B shall be heat treated
9. 2), after welding to a minimum of 1000 °F [540 °C]
3.1.11 Certification (see Section 20), so that no untempered martensite remains, or
3.1.12 Report of the length of the end effect, otherwise processed in such a manner that no
if desired (see untempered martensite remains.
9.2.7), 4.4 When pipe is cold expanded, the amount
3.1.13 Marking (see Section 21), of expansion shall not exceed 11⁄2 % of the
3.1.14 End use of pipe, specified outside diameter of the pipe.
3.1.15 Special requirements,
3.1.16 Supplementary requirements, if any, 5. Chemical Composition
3.1.17 Selection of applicable level of 5.1 The steel shall conform to the
preservation and packaging and level of packing requirements as to chemical composition given
required, if other than as specified or if MIL- in Table 1 and the chemical analysis shall be in
STD-163 applies (see 22.1), and 3.1.18 accordance with Test Methods, Practices, and
Packaging and package marking, if desired (see Terminology A751.
23.1).
6. Product Analysis
4. Materials and Manufacture 6.1 The purchaser is permitted to perform an
4.1 The steel for both seamless and welded analysis of two pipes from each lot of 500
pipe shall be made by one or more of the lengths, or fraction thereof. Samples for
following processes: open-hearth, electric- chemical analysis, except for spectrographic
furnace, or basic-oxygen. analysis, shall be taken in accordance with
Practice E1806. The chemical
composition thus determined shall
conform to the requirements
given in Table 1.
6.2 If the analysis of either pipe
does not conform to the
requirements given in Table 1,
analyses shall be made on
additional pipes of double the
original number from the same
lot, each of which shall conform
to the specified requirements.

7. Mechanical Properties
7.1 Tension Test:
TABLE 1 Chemical Requirements
Composition, max, %

Carbon Manganese Phosphorus Sulfur CopperA NickelA ChromiumA MolybdenumA Van

A

Type S (seamless pipe)

Grade A 0.25B 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0

Grade B 0.30C 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0
Type E (electric-resistance-welded)

Grade A 0.25B 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0

Grade B 0.30C 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0

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 A53/A53M − 12
Type F (furnace-welded pipe)

Grade A 0.30B 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0

AThe total composition for these five elements shall not exceed 1.00 %. B For each reduction of 0.01 % below the specified carbon
maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %. C For
each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum
will be permitted up to a maximum
B
of 1.65 %. See Table X4.1 or Table X4.2, whichever is applicable, for the
minimum elongation values that are required for various
combinations of tension test specimen size and specified
minimum tensile strength.

7.1.1 For tension tests other than transverse 7.2.2 If ordered for close coiling, the pipe
weld tension tests, the yield strength shall stand being bent cold through 180° around
corresponding to a permanent offset of 0.2 % of a cylindrical mandrel, the diameter of which is
the gage length or to an extension of 0.5 % of eight times the specified outside diameter of the
the gage length under load, the tensile strength, pipe, without failure.
and the elongation in 2 in. or 50 mm shall be 7.2.3 Double-extra-strong pipe over NPS 11⁄4
determined, and the tension test results shall [DN 32] need not be subjected to the bend test.
conform to the applicable tensile property
7.3 Flattening Test:
requirements given in Table 2.
7.1.2 For transverse weld tension tests, the 7.3.1 The flattening test shall be made on
tensile strength shall be determined, and the welded pipe over NPS 2 [DN 50] in extra-strong
tension test results shall conform to the weight or lighter.
applicable tensile strength requirement given in 7.3.2 Seamless Pipe:
Table 2. 7.3.2.1 Although testing is not required, pipe
7.1.3 Electric-resistance-welded pipe NPS 8 shall be capable of meeting the flattening test
[DN 200] or larger shall be tested using two requirements of Supplementary Requirement
transverse test specimens, one taken across the S1, if tested.
weld and one taken opposite the weld. 7.3.3 Electric-Resistance-Welded Pipe:
7.1.4 Transverse tension test specimens shall
7.3.3.1 A test specimen at least 4 in. [100
be approximately 11⁄2 in. [38 mm] wide in the
mm] in length shall be flattened cold between
gage length and shall represent the full wall
parallel plates in three steps, with the weld
thickness of the pipe from which the test
located either 0° or 90° from the line of
specimens were cut.
direction of force as required by 7.3.3.2 or
7.2 Bend Test: 7.3.3.3, whichever is applicable. During the first
7.2.1 For pipe NPS 2 [DN 50] or smaller, a step, which is a test for ductility of the weld,
sufficient length of pipe shall be capable of except as allowed by 7.3.5, 7.3.6, and 7.3.7, no
being bent cold through 90° around a cylindrical cracks or breaks on the inside or outside surface
mandrel, the diameter of which is twelve times at the weld shall be present before the distance
the specified outside diameter of the pipe, between the plates is less than two thirds of the
without developing cracks at any portion and specified outside diameter of the pipe. As a
without opening the weld. second step, the flattening shall be continued as
a test for ductility away from the weld. During
TABLE 2 Tensile Requirements the second step, except as allowed by 7.3.6 and
Grade A 7.3.7, no cracks or breaks on the inside or
outside surface away from the weld shall be
Tensile strength, min, psi [MPa] 48 000 [330] 60 000 [415] before the distance between the plates is
present
Yield strength, min, psi [MPa] 30 000 [205] 35 000 [240]
Elongation in 2 in. or 50 mm A,B less than one third of the specified outside
A
The minimum elongation in 2 in. [50 mm] shall be that diameter of the pipe but is not less than five
determined by the following equation: times the specified wall thickness of the pipe.
e 5 625000 f1940g A0.2/U 0.9 During the third step, which is a test for
soundness, the flattening shall be continued
where:
until the test specimen breaks or the opposite
e = minimum elongation in 2 in. or 50 mm in percent,
rounded to the nearest percent, walls of the test specimen meet. Evidence of
A = the lesser of 0.75 in.2 [500 mm2] and the cross- laminated or unsound material or of incomplete
sectional area of the tension test specimen, calculated
using the specified outside diameter of the pipe, or the weld that is revealed by the flattening test shall
nominal width of the tension test specimen and the be cause for rejection.
specified wall thickness of the pipe, with the calculated
value rounded to the nearest 0.01 in.2 [1 mm2], and 7.3.3.2 For pipe produced in single lengths,
U = specified minimum tensile strength, psi [MPa]. the flattening test specified in 7.3.3.1 shall be
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 A53/A53M − 12
made using a test specimen taken
from each end of each length of pipe. The tests
from each end shall be made alternately with the
weld at 0° and at 90° from the line of direction
of force.
7.3.3.3 For pipe produced in multiple lengths,
the flattening test specified in 7.3.3.1 shall be
made as follows:

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 A53/A53M − 12

(1) Test specimens taken from, and representative of, the applicable pressure given in Table X2.3. It shall be
front end of the first pipe intended to be supplied from each permissible, at the discretion of the manufacturer, to perform
coil, the back end of the last pipe intended to be supplied from the hydrostatic test on pipe with plain ends, with threads only,
each coil, and each side of any intermediate weld stop location or with threads and couplings; and it shall also be permissible
shall be flattened with the weld located at 90° from the line of to test pipe in either single lengths or multiple lengths.
direction of force. NOTE 4—The hydrostatic test pressures given herein are inspection test
(2) Test specimens taken from pipe at any two locations pressures, are not intended as a basis for design, and do not have any
direct relationship to working pressures.
intermediate to the front end of the first pipe and the back end
of the last pipe intended to be supplied from each coil shall be 8.3 The minimum hydrostatic test pressure required to
flattened with the weld located at 0° from the line of direction satisfy the requirements specified in 8.2 need not exceed 2500
of force. psi [17 200 kPa] for pipe NPS 3 [DN 80] or smaller, or 2800
7.3.3.4 For pipe that is to be subsequently reheated psi [19 300 kPa] for pipe larger than NPS 3 [DN 80];
throughout its cross section and hot formed by a reducing however, the manufacturer has the option of using higher test
process, the manufacturer shall have the option of obtaining pressures. For all sizes of seamless pipe and electric-
the flattening test specimens required by 7.3.3.2 or 7.3.3.3, resistance-welded pipe, the hydrostatic test pressure shall be
whichever is applicable, either prior to or after such hot maintained for at least 5 s.
reducing. 9. Nondestructive Electric Test
7.3.4 Continuous-Welded Pipe—A test specimen at least 4
9.1 Type E Pipe:
in. [100 mm] in length shall be flattened cold between parallel
9.1.1 Except for pipe produced on a hot-stretch reducing
plates in three steps. The weld shall be located at 90° from the
mill, the weld seam of each length of electric-
line of direction of force. During the first step, which is a test
resistancewelded pipe NPS 2 [DN 50] or larger shall be tested
for ductility of the weld, except as allowed by 7.3.5, 7.3.6, and
with a nondestructive electric test in accordance with Practices
7.3.7, no cracks or breaks on the inside, outside, or end
E213, E273, E309, or E570. Each length of electric-
surfaces at the weld shall be present before the distance
resistancewelded pipe NPS 2 [DN 50] or larger and produced
between the plates is less than three fourths of the specified
on a hot-stretch-reducing mill shall be tested with a
outside diameter of the pipe. As a second step, the flattening
nondestructive electric test that inpsects the full volume of the
shall be continued as a test for ductility away from the weld.
pipe in accordance with Practices E213, E309, or E570.
During the second step, except as allowed by 7.3.6 and 7.3.7,
9.1.2 Ultrasonic and Electromagnetic Inspection—Any
no cracks or breaks on the inside, outside, or end surfaces
equipment utilizing the ultrasonic or electromagnetic
away from the weld shall be present before the distance
principles and capable of continuous and uninterrupted
between the plates is less than 60 % of the specified outside
inspection of the weld seam shall be used. The equipment
diameter of the pipe. During the third step, which is a test for
shall be checked with an applicable reference standard as
soundness, the flattening shall be continued until the test
described in 9.1.3 at least once every working turn or not more
specimen breaks or the opposite walls of the test specimen
than 8 h to demonstrate its effectiveness and the inspection
meet. Evidence of laminated or unsound material or of
procedures. The equipment shall be adjusted to produce well-
incomplete weld that is revealed by the flattening test shall be
defined indications when the reference standard is scanned by
cause for rejection.
the inspection unit in a manner simulating the inspection of
7.3.5 Surface imperfections in the test specimen before the product.
flattening, but revealed during the first step of the flattening
9.1.3 Reference Standards—The length of the reference
test, shall be judged in accordance with the finish
standards shall be determined by the pipe manufacturer, and
requirements in Section 12.
they shall have the same specified diameter and thickness as
7.3.6 Superficial ruptures as a result of surface the product being inspected. Reference standards shall contain
imperfections shall not be cause for rejection. machined notches, one on the inside surface and one on the
7.3.7 For pipe with a D-to-t ratio less than 10, because the outside surface, or a drilled hole, as shown in Fig. 1, at the
strain imposed due to geometry is unreasonably high on the option of the pipe manufacturer. The notches shall be parallel
inside surface at the 6 and 12 o’clock locations, cracks at such to the weld seam, and shall be separated by a distance
locations shall not be cause for rejection. sufficient to produce two separate and distinguishable signals.
The 1 ⁄8-in. [3.2-mm] hole shall be drilled through the wall and
8. Hydrostatic Test perpendicular to the surface of the reference standard as
shown in Fig. 1. Care shall be taken in the preparation of the
8.1 The hydrostatic test shall be applied, without leakage
reference standard to ensure freedom from fins or other edge
through the weld seam or the pipe body.
roughness, or distortion of the pipe.
8.2 Plain-end pipe shall be hydrostatically tested to the NOTE 5—The calibration standards shown in Fig. 1 are convenient
applicable pressure given in Table X2.2, and threaded- standards for calibration of nondestructive testing equipment. The
andcoupled pipe shall be hydrostatically tested to the
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 A53/A53M − 12

dimensions of such standards are not to be construed as the minimum 9.2.2 The following information is intended to facilitate the
sizes of imperfections detectable by such equipment. use of this specification:
9.1.4 Acceptance Limits—Table 3 gives the height of 9.2.2.1 The calibration standards defined in 9.2.3 through
acceptance limit signals in percent of the height of signals 9.2.5 are convenient standards for calibration of
produced by reference standards. Imperfections in the weld nondestructive testing equipment. The dimensions of such
seam that produce a signal greater than the acceptance limit standards are not to be construed as the minimum sizes of
signal given in Table 3 shall be considered a defect unless the imperfections detectable by such equipment.
pipe manufacturer can demonstrate that the imperfection does 9.2.2.2 The ultrasonic testing referred to in this specification
not reduce the effective wall thickness beyond 12.5 % of the is capable of detecting the presence and location of significant
specified wall thickness. longitudinally or circumferentially oriented imperfections;

FIG. 1 Calibration Standards

TABLE 3 Acceptance Limits however, different techniques need to be employed for the
TypeNotch SizeofHole Acceptance detection of differently oriented imperfections. Ultrasonic
in. mm Limit testing is not necessarily capable of detecting short, deep
Signal,%
N10,V10 ⁄
1 8
3.2 100
imperfections.
B,P ... ... 80 9.2.2.3 The eddy current examination referenced in this
specification has the capability of detecting significant
discontinuities, especially of the short abrupt type.
9.2.2.4 The flux leakage examination referred to in this
9.2 Type S Pipe—As an alternative to the hydrostatic test at specification is capable of detecting the presence and location
the option of the manufacturer or if specified in the purchase of significant longitudinally or transversely oriented
order, the full body of each seamless pipe shall be tested with discontinuities. The provisions of this specification only
a nondestructive electric test in accordance with Practice require longitudinal calibration for flux leakage. Different
E213, E309, or E570. In such cases, each length so furnished techniques need to be employed for the detection of
shall include the mandatory marking of the letters “NDE.” differently oriented imperfections.
Except as allowed by 9.2.6.2, it is the intent of this 9.2.2.5 The hydrostatic test referred to in 8.2 has the
nondestructive electric test to reject pipe with imperfections capability of finding imperfections of a size permitting the test
that produce test signals equal to or greater than those fluid to leak through the tube wall and may be either visually
produced by the applicable calibration standards. seen or detected by a loss of pressure. Hydrostatic testing is
9.2.1 If the nondestructive electric test has been performed, not necessarily capable of detecting very tight through-the-
the lengths shall be marked with the letters “NDE.” The wall imperfections or imperfections that extend an appreciable
certification, if required, shall state Nondestructive Electric distance into the wall without complete penetration.
Tested and shall indicate which of the tests was applied. Also, 9.2.2.6 A purchaser interested in ascertaining the nature
the letters NDE shall be appended to the product specification (type, size, location, and orientation) of imperfections that are
number and grade shown on the certification. capable of being detected in the specific application of these
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 A53/A53M − 12

examinations is directed to discuss this with the manufacturer by the calibration standard shall be rejected or the area
of the tubular product. producing the signal shall be rejected.
9.2.3 For ultrasonic testing, the calibration reference 9.2.6.1 Test signals produced by imperfections that cannot
notches shall be at the option of the manufacturer, and shall be be identified, or produced by cracks or crack-like
any one of the three common notch shapes shown in Practice imperfections, shall result in rejection of the pipe, unless it is
E213. The depth of notch shall not exceed 12.5 % of the repaired and retested. To be accepted, the pipe shall pass the
specified wall thickness of the pipe or 0.004 in. [0.1 mm], same specification test to which it was originally subjected
whichever is the greater. and the remaining wall thickness shall not have been
9.2.4 For eddy current testing, the calibration pipe shall decreased below that permitted by the specification. It shall be
contain, at the option of the manufacturer, any one of the permissible to reduce the outside diameter at the point of
following calibration standards to establish a minimum grinding by the amount so removed.
sensitivity level for rejection. 9.2.6.2 It shall be permissible to evaluate test signals
9.2.4.1 Drilled Hole—The calibration pipe shall contain produced by visual imperfections in accordance with the
three holes spaced 120° apart or four holes spaced 90° apart, provisions of Section 12. A few examples of such
sufficiently separated longitudinally to ensure separately imperfections are straightener marks, cutting chips, scratches,
distinguishable responses. The holes shall be drilled radially steel die stamps, stop marks, or pipe reducer ripple.
and completely through the pipe wall, care being taken to 9.2.7 The test methods described in Section 9 are not
avoid distortion of the pipe while drilling. Dependent upon the necessarily capable of inspecting the end portion of pipes.
nominal pipe size, the calibration pipe shall contain the This condition is referred to as end effect. The length of the
following hole: end effect shall be determined by the manufacturer and, if
NPS DN Diameter of Drilled Hole
# 1⁄2 # 15 0.039 in. [1.0 mm]
specified in the purchase order, reported to the purchaser.
> 1⁄2 # 11⁄4 > 15 # 32 0.055 in. [1.4 mm]
> 11⁄4 # 2 > 32 # 50 0.071 in. [1.8 mm]
10. Permissible Variations in Weight (Mass) and
>2#5 > 50 # 125 0.087 in. [2.2 mm] Dimensions
>5 > 125 0.106 in. [2.7 mm]
10.1 Weight (Mass)—The weight (mass) of the pipe shall
9.2.4.2 Transverse Tangential Notch—Using a round tool or
not vary more than 6 10 % from its specified weight (mass), as
file with a 1⁄4 in. [6 mm] diameter, a notch shall be filed or
derived by multiplying its measured length by its specified
milled tangential to the surface and transverse to the
weight (mass) per unit length, as given in Table X2.2 or Table
longitudinal axis of the pipe. The notch shall have a depth not
X2.3, or as calculated using the relevant equation in ASME
exceeding 12.5 % of the specified wall thickness of the pipe or
B36.10M.
0.012 in. [0.3 mm], whichever is the greater.
NOTE 6—For pipe NPS 4 [DN 100] or smaller, the weight (mass)
9.2.4.3 Longitudinal Notch—A notch 0.031 in. [0.8 mm] or
tolerance is applicable to the weights (masses) of the customary lifts of
less in width shall be machined in a radial plane parallel to the pipe as produced for shipment by the mill. For pipe larger than NPS 4
pipe axis on the outside surface of the pipe, to a depth not [DN 100], where individual lengths are weighed, the weight (mass)
exceeding 12.5 % of the specified wall thickness of the pipe or tolerance is applicable to the individual lengths.
0.012 in. [0.3 mm], whichever is the greater. The length of the 10.2 Diameter—For pipe NPS 11⁄2 [DN 40] or smaller, the
notch shall be compatible with the testing method. outside diameter at any point shall not vary more than 6 1⁄64 in.
9.2.4.4 Compatibility—The calibration standards in the [0.4 mm] from the specified outside diameter. For pipe NPS 2
calibration pipe shall be compatible with the testing [DN 50] or larger, the outside diameter shall not vary more
equipment and the method being used. than 6 1 % from the specified outside diameter.
9.2.5 For flux leakage testing, the longitudinal calibration
10.3 Thickness—The minimum wall thickness at any point
reference notches shall be straight-sided notches machined in
shall be not more than 12.5 % under the specified wall
a radial plane parallel to the pipe axis. For specified wall
thickness. The minimum wall thickness on inspection shall
thicknesses less than 0.500 in. [12.7 mm], outside and inside
conform to the requirements given in Table X2.4.
notches shall be used. For specified wall thicknesses equal to
or greater than 0.500 in. [12.7 mm], only an outside notch 11. End Finish
shall be used. The notch depth shall not exceed 12.5 % of the 11.1 If ordered with plain ends, the pipe shall be furnished
specified wall thickness, or 0.012 in. [0.3 mm], whichever is to the following practice, unless otherwise specified.
the greater. The notch length shall not exceed 1 in. [25 mm],
11.1.1 NPS 11⁄2 [DN 40] or Smaller—Unless otherwise
and the notch width shall not exceed the notch depth. Outside
specified in the purchase order, end finish shall be at the
diameter and inside diameter notches shall be located
option of the manufacturer.
sufficiently apart to allow separation and identification of the
11.1.2 Larger than NPS 11⁄2 [DN 40]:
signals.
11.1.2.1 Pipe of standard-weight or extra-strong weight, or
9.2.6 Pipe containing one or more imperfections that
in wall thickness less than 0.500 in. [12.7 mm], other than
produce a signal equal to or greater than the signal produced
double extra-strong weight pipe, shall be plain-end beveled

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 A53/A53M − 12

with ends beveled to an angle of 30°, +5°, -0°, measured from 12.3 At the purchaser’s discretion, pipe shall be subjected to
a line drawn perpendicular to the axis of the pipe, and with a rejection if surface defects repaired in accordance with 12.2
root face of 1⁄16 in. 6 1⁄32 in. [1.6 mm 6 0.8 mm]. are not scattered, but appear over a large area in excess of
11.1.2.2 Pipe with a specified wall thickness greater than what is considered a workmanlike finish. Disposition of such
0.500 in. [12.7 mm], and all double extra-strong weight pipe, pipe shall be a matter of agreement between the manufacturer
shall be plain-end square cut. and the purchaser.
11.2 If ordered with threaded ends, the pipe ends shall be 12.4 For the removal of imperfections and defects by
provided with a thread in accordance with the gaging practice grinding, a smooth curved surface shall be maintained, and the
and tolerances of ANSI B1.20.1. For standard-weight pipe wall thickness shall not be decreased below that permitted by
NPS 6 [DN 150] or smaller, refer to Table X3.1 for threading this specification. It shall be permissible to reduce the outside
data. For standard-weight pipe NPS 8 [DN 200] or larger and diameter at the point of grinding by the amount so removed.
all sizes of extra-strong weight pipe and double extra-strong 12.4.1 Wall thickness measurements shall be made with a
weight pipe, refer to Table X3.2 for threading data. Threaded mechanical caliper or with a properly calibrated
pipe NPS 4 [DN 100] or larger shall have thread protectors on nondestructive testing device of appropriate accuracy. In the
the ends not protected by a coupling. case of a dispute, the measurement determined by use of the
11.3 If ordered with couplings, one end of each length of mechanical caliper shall govern.
pipe shall be provided with a coupling manufactured in 12.5 Weld repair shall only be permitted with the approval
accordance with Specification A865. The coupling threads of the purchaser and in accordance with Specification A530/
shall be in accordance with the gaging practice of ANSI A530M.
B1.20.1. The coupling shall be applied handling-tight, unless
12.6 The finished pipe shall be reasonably straight.
power-tight is specified in the purchase order. Couplings are
to be made of steel. Taper-tapped couplings shall be furnished 12.7 The pipe shall contain no dents greater than 10 % of
on all threaded pipe NPS 2 1⁄2 [DN 65] or larger. For pipe the pipe diameter or 1⁄4 in. [6 mm], whichever is smaller,
smaller than NPS 21⁄2 [DN 65], it is regular practice to furnish measured as the gap between the lowest point of the dent and
straight-tapped couplings for standard-weight pipe and a prolongation of the original contour of the pipe. Cold-
tapertapped couplings for extra-strong and double extra-strong formed dents deeper than 1⁄8 in. [3 mm] shall be free of sharp-
weight pipe. If taper-tapped couplings are required for bottomed gouges; it shall be permissible to remove the gouges
standard-weight pipe smaller than NPS 21⁄2 [DN 65], it is by grinding, provided that the remaining wall thickness is
recommended that line pipe threads in accordance with API within specified limits. The length of the dent in any direction
Specification 5B be ordered. The taper-tapped couplings shall not exceed one half the specified outside diameter of the
provided on line pipe in such sizes may be used on mill- pipe.
threaded standard-weight pipe of the same size.
13. Number of Tests
12. Workmanship, Finish, and Appearance 13.1 Except as required by 13.2, one of each of the tests
specified in Section 7 shall be made on test specimens taken
12.1 The pipe manufacturer shall explore a sufficient
from one length of pipe from each lot of each pipe size. For
number of visual surface imperfections to provide reasonable
continuous-welded pipe, each lot shall contain no more than
assurance that they have been properly evaluated with respect
25 tons [23 Mg] of pipe for pipe sizes NPS 1 1⁄2 [DN 40] and
to depth.
smaller, and no more than 50 tons [45 Mg] of pipe for pipe
12.2 Surface imperfections that penetrate more than 12.5 % sizes larger than NPS 11⁄2 [DN 40]. For seamless and
of the specified wall thickness or encroach on the minimum electricresistance-welded pipe, a lot shall contain no more
wall thickness shall be considered defects. Pipe with defects than one heat, and at the option of the manufacturer shall
shall be given one or more of the following dispositions: contain no more than 500 lengths of pipe (as initially cut after
12.2.1 The defect shall be removed by grinding, provided the final pipe-forming operation, prior to any further cutting to
that the remaining wall thickness is within specified limits, the required ordered lengths) or 50 tons [45 Mg] of pipe.
12.2.2 Type S pipe and the parent metal of Type E pipe, 13.2 The number of flattening tests for electric-
except within 1⁄2 in. [13 mm] of the fusion line of the electric- resistancewelded pipe shall be in accordance with 7.3.3.2 or
resistance-weld seam, are permitted to be repaired in 7.3.3.3, whichever is applicable.
accordance with the welding provisions of 12.5. Repair
welding of Type F pipe and the weld seam of Type E pipe is 13.3 Except as allowed by 9.2, each length of pipe shall be
prohibited. subjected to the hydrostatic test (see Section 8).
12.2.3 The section of pipe containing the defect shall be cut 14. Retests
off within the limits of requirement on length, or 14.1 Except for flattening tests of electric-resistance-welded
12.2.4 Rejected. pipe, if the results of a mechanical test for a lot fail to conform
to the applicable requirements specified in Section 7, the lot
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 A53/A53M − 12

shall be rejected unless tests of additional pipe from the shall be permissible for not more than 5 % of the total of pipe
affected lot of double the number originally tested are to be in lengths of 6 to 12 ft [1.83 to 3.66 m].
subsequently made and each such test conforms to the 16.1.4 For extra-strong weight or lighter pipe ordered in
specified requirements. Only one retest of any lot will be double-random lengths, the minimum lengths shall be not less
permitted. Any individual length of pipe that conforms to the than 22 ft [6.71 m] and the minimum average length for the
test requirements is acceptable. Any individual length of pipe order shall be not less than 35 ft [10.67 m].
that does not conform to the test requirements may be 16.1.5 For pipe heavier than extra-strong weight ordered in
resubmitted for test and will be considered acceptable if tests lengths longer than single random, the lengths shall be as
taken from each pipe end conform to the specified agreed upon between the manufacturer and the purchaser.
requirements. 16.1.6 If pipe is furnished threaded and coupled, the length
14.2 Electric-Resistance-Welded Pipe Produced in Single shall be measured to the outer face of the coupling.
Lengths—If any flattening test result fails to conform to the
requirements specified in 7.3.3, the affected single length shall 17. Galvanized Pipe
be rejected unless the failed end is subsequently retested using 17.1 Galvanized pipe ordered under this specification shall
the same weld orientation as the failed test and a satisfactory be coated with zinc inside and outside by the hot-dip process.
test result is obtained before the pipe’s length is reduced by The zinc used for the coating shall be any grade of zinc
such testing to less than 80 % of its length after the initial conforming to Specification B6.
cropping.
17.2 Weight (Mass) per Unit Area of Coating—The weight
14.3 Electric-Resistance-Welded Pipe Produced in Multiple (mass) per unit area of zinc coating shall be not less than 1.8
Lengths—If any flattening test result fails to conform to the oz/ft2 [0.55 kg/m2] as determined from the average results of
requirements specified in 7.3.3, the affected multiple length the two specimens taken for test in the manner prescribed in
shall be rejected or flattening tests shall be made using a test 17.5 and not less than 1.6 oz/ft2 [0.49 kg/m2] for each of these
specimen taken from each end of each individual length in the specimens. The weight (mass) per unit area of coating,
failed multiple length. For each pipe end, such tests shall be expressed in ounces per square foot [kilograms per square
made with the weld alternately at 0° and 90° from the line of metre] shall be calculated by dividing the total weight (mass)
direction of force. Individual lengths are considered of zinc, inside plus outside, by the total area, inside plus
acceptable if the test results for both pipe ends conform to the outside, of the surface coated. Each specimen shall have not
specified requirements. less than 1.3 oz/ft2 [0.40 kg/m2] of zinc coating on each
15. Test Methods surface, calculated by dividing the total weight (mass) of zinc
15.1 The test specimens and the tests required by this on the given surface (outside or inside) by the area of the
specification shall conform to those described in the latest surface coated (outside or inside).
issue of Test Methods and Definitions A370. 17.3 Weight (Mass) per Unit Area of Coating Test—The
weight (mass) per unit area of zinc coating shall be
15.2 Each longitudinal tension test specimen shall be taken
determined by stripping tests in accordance with Test Method
from a pipe end and shall not be flattened between the gage
A90/A90M.
marks.
17.4 Test Specimens—Test specimens for determination of
15.3 Test specimens for bend tests and flattening tests shall
weight (mass) per unit area of coating shall be cut
be taken from pipe. Test specimens for flattening tests shall be
approximately 4 in. [100 mm] in length.
smooth on the ends and free from burrs.
17.5 Number of Tests—Two test specimens for the
15.4 Tests shall be conducted at room temperature.
determination of weight (mass) per unit area of coating shall
be taken, one from each end of one length of galvanized pipe
16. Lengths
selected at random from each lot of 500 lengths, or fraction
16.1 Unless otherwise specified, pipe lengths shall be in thereof, of each size.
accordance with the following regular practices:
17.6 Retests—If the weight (mass) per unit area of coating
16.1.1 Except as allowed by 16.1.2 and 16.1.4, pipe lighter
of any lot does not conform to the requirements specified in
than extra-strong weight shall be in single-random lengths of
17.2, retests of two additional pipes from the same lot shall be
16 to 22 ft [4.88 to 6.71 m], with not more than 5 % of the
made, each of which shall conform to the specified
total number of threaded lengths furnished being jointers (two
requirements.
pieces coupled together).
16.1.2 For plain-end pipe lighter than extra-strong weight, it 17.7 If pipe ordered under this specification is to be
shall be permissible for not more than 5 % of the total number galvanized, the tension, flattening, and bend tests shall be
of pipe to be in lengths of 12 to 16 ft [3.66 to 4.88 m]. made on the base material before galvanizing, if practicable. If
16.1.3 Pipe of extra-strong weight or heavier shall be in specified, results of the mechanical tests on the base material
random lengths of 12 to 22 ft [3.66 to 6.71 m], except that it shall be reported to the purchaser. If it is impracticable to

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 A53/A53M − 12

make the mechanical tests on the base material before NOTE 7—EDI is the computer to computer exchange of business
galvanizing, it shall be permissible to make such tests on information in a standard format such as ANSI ASC X12.
galvanized samples, and any flaking or cracking of the zinc 20.4 Notwithstanding the absence of a signature, the
coating shall not be considered cause for rejection. If organization submitting the certificate of compliance or test
galvanized pipe is bent or otherwise fabricated to a degree that report is responsible for its content.
causes the zinc coating to stretch or compress beyond the limit
of elasticity, some flaking of the coating is acceptable. 21. Product Marking
21.1 Except as allowed by 21.5 and 21.6, each length of
18. Inspection pipe shall be legibly marked in the following sequence to
18.1 The inspector representing the purchaser shall have show:
entry, at all times while work on the contract of the purchaser 21.1.1 Manufacturer’s name or mark,
is being performed, to all parts of the manufacturer’s works 21.1.2 Specification number (year-date not required),
that concern the manufacture of the pipe ordered. The NOTE 8—Pipe that complies with multiple compatible specifications
manufacturer shall afford the inspector all reasonable facilities may be marked with the appropriate designation for each specification.
to be satisfied that the pipe is being furnished in accordance
21.1.3 Size (NPS and weight class, schedule number, or
with this specification. All tests (except product analysis) and
specified wall thickness; or specified outside diameter and
inspection shall be made at the place of manufacture prior to
specified wall thickness),
shipment, unless otherwise specified, and shall be so
conducted as not to interfere unnecessarily with the operation 21.1.4 Grade (A or B),
of the works. 21.1.5 Type of pipe (F, E, or S),
21.1.6 Test pressure, seamless pipe only (if applicable, in
19. Rejection accordance with Table 4),
21.1.7 Nondestructive electric test, seamless pipe only (if
19.1 The purchaser is permitted to inspect each length of
applicable, in accordance with Table 4),
pipe received from the manufacturer and, if it does not meet
the requirements of this specification based upon the 21.2 Unless another marking format is specified in the
inspection and test method as outlined in the specification, the purchase order, length shall be marked in feet and tenths of a
length shall be rejected and the manufacturer shall be notified. foot, or metres to two decimal places, dependent upon the
Disposition of rejected pipe shall be a matter of agreement units to which the pipe was ordered. The location of such
between the manufacturer and the purchaser. marking shall be at the option of the manufacturer.
21.3 Heat number, lot number, run number, or a
19.2 Pipe found in fabrication or in installation to be
combination thereof shall be marked at the option of the
unsuitable for the intended use, under the scope and
manufacturer, unless specific marking is specified in the
requirements of this specification, shall be set aside and the
purchase order. The location of such marking shall be at the
manufacturer notified. Such pipe shall be subject to mutual
option of the manufacturer.
investigation as to the nature and severity of the deficiency
and the forming or installation, or both, conditions involved. 21.4 Any additional information desired by the
Disposition shall be a matter for agreement. manufacturer or specified in the purchase order.
20. Certification 21.5 For pipe NPS 11⁄2 [DN 40] and smaller that is bundled,
20.1 The manufacturer or supplier shall, upon request, it shall be permissible to mark the required information on a
furnish to the purchaser a certificate of compliance stating that tag securely attached to each bundle.
the material has been manufactured, sampled, tested, and 21.6 If pipe sections are cut into shorter lengths by a
inspected in accordance with this specification (including processor for resale as pipe, the processor shall transfer the
year-date), and has been found to meet the requirements. complete identification, including the name or brand of the
20.2 Test Report—For Types E and S, the manufacturer or manufacturer, to each unmarked cut length, or to metal tags
supplier shall furnish to the purchaser a chemical analysis securely attached to unmarked pipe bundled in accordance
report for the elements given in Table 1. with the requirements of 21.5. The same material designation
shall be included with the information transferred, and the
20.3 EDI—A certificate of compliance or test report printed processor’s name, trademark, or brand shall be added.
from, or used in, electronic form from an electronic data
interchange (EDI) transmission shall be regarded as having 21.7 Bar Coding—In addition to the requirements in 21.1,
the same validity as a counterpart printed in the certifier’s 21.5, and 21.6, bar coding is acceptable as a supplementary
facility. identification method. It is recommended that bar coding be
The use and format of the EDI document are subject to consistent with the Automotive Industry Action Group
agreement between the purchaser and the manufacturer or (AIAG) standard prepared by the Primary Metals
supplier. Subcommittee of the AIAG Bar Code Project Team.

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 A53/A53M − 12

22. Government Procurement inspection and test requirements specified herein. Except as
22.1 If specified in the contract, the pipe shall be preserved, otherwise specified in the contract, the manufacturer shall use
packaged, and packed in accordance with the requirements of its own or any other suitable facilities for performing the
MIL-STD-163. The applicable levels shall be as specified in inspection and test requirements specified herein, unless
the contract. Marking for shipment of such pipe shall be in otherwise disapproved by the purchaser in the contract or
accordance with Fed. Std. No. 123 for civil agencies and MIL- purchase order. The purchaser shall have the right to perform
STD-129 or Fed. Std. No. 183 if continuous marking is any of the inspections and tests set forth in this specification
required, for military agencies. where deemed necessary to ensure that the pipe conforms to
the specified requirements.
22.2 Inspection—Unless otherwise specified in the contract,
the manufacturer is responsible for the performance of all 23. Packaging and Package Marking
TABLE 4 Marking of Seamless Pipe
Hydro NDE Marking

Yes No Test pressure

No Yes NDE
Yes Yes Test Pressure/NDE
23.1 If specified in the purchase order, packaging, marking, and loading for shipment shall be in accordance with those
procedures recommended by Practices A700.
24. Keywords
24.1 black steel pipe; seamless steel pipe; steel pipe; welded steel pipe; zinc coated steel pipe

SUPPLEMENTARY REQUIREMENTS

The following supplementary requirements shall apply only when specified in the purchase order. The purchaser
may specify a different frequency of test than is provided in the supplementary requirement. Subject to agreement
between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements
may also be modified.
S1. Flattening Test, Seamless Pipe test, shall be judged in accordance with the finish
S1.1 A test specimen at least 2 ⁄2 in. [60 mm] in length shall
1 requirements in Section 12.
be flattened cold between parallel plates in two steps. During S1.4 Superficial ruptures as a result of surface imperfections
the first step, which is a test for ductility, except as allowed by shall not be cause for rejection.
S1.3, S1.4, and S1.5, no cracks or breaks on the inside, S1.5 For pipe with a D-to-t ratio less than 10, because the
outside, or end surfaces shall be present before the distance strain imposed due to geometry is unreasonably high on the
between the plates is less than the value of H calculated as inside surface at the 6 and 12 o’clock locations, cracks at such
follows: locations shall not be cause for rejection.
H 5 ~11e!t/~e1t/D! S1.6 One test shall be made on test specimens taken from
one length of pipe from each lot of each pipe size. A lot shall
where: contain no more than one heat, and at the option of the
H = distance between flattening plates, in. [mm], e = manufacturer shall contain no more than 500 lengths of pipe
deformation per unit length (constant for a given grade of (as initially cut after the final pipe-forming operation, prior to
steel, 0.09 for Grade A, and 0.07 for Grade B), any further cutting to the required ordered lengths) or 50 tons
t = specified wall thickness, in. [mm], and [45 Mg] of pipe.
D = specified outside diameter, in. [mm] S1.7 If the results of a test for a lot fail to conform to the
The H values have been calculated for standard-weight and applicable requirements, the lot shall be rejected unless tests
extra-heavy weight pipe from NPS 2 ⁄2 to NPS 24 [DN 65 to
1 of additional pipe from the affected lot of double the number
DN 600], inclusive, and are given in Table X2.1. originally tested are subsequently made and each such test
S1.2 During the second step, which is a test for soundness, conforms to the specified requirements. Only one retest of any
the flattening shall be continued until the test specimen breaks lot will be permitted. Any individual length of pipe that
or the opposite sides of the test specimen meet. Evidence of conforms to the test requirements is acceptable. Any
laminated or unsound material that is revealed during the individual length of pipe that does not conform to the test
entire flattening test shall be cause for rejection. requirements may be resubmitted for test and will be
S1.3 Surface imperfections in the test specimen before considered acceptable if tests taken from each pipe end
flattening, but revealed during the first step of the flattening conform to the specified requirements.

APPENDIXES
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X1. DEFINITIONS OF TYPES OF PIPE
 A53/A53M − 12

X1.1 Type F, Furnace-Butt-Welded Pipe,

ContinuousWelded Pipe—Pipe produced in multiple lengths
from coiled skelp and subsequently cut into individual lengths, X1.3 Type S, Seamless Pipe—Pipe made without a welded
having its longitudinal butt joint forge welded by the seam. It is manufactured by hot working steel and, if
mechanical pressure developed in rolling the hot-formed skelp necessary, by subsequently cold finishing the hot-worked
through a set of round pass welding rolls. tubular product to produce the desired shape, dimensions, and
properties.
X1.2 Type E, Electric-Resistance-Welded Pipe—Pipe
produced in single lengths, or in multiple lengths from coiled
skelp and subsequently cut into individual lengths, having a
longitudinal butt joint wherein coalescence is produced by the
heat obtained from resistance of the pipe to the flow of electric

current in a circuit of which the pipe is a part, and by the

application of pressure. X2.1 Tables X2.1-X2.4 address dimensional

and certain mechanical requirements.

TABLE X2.1 Calculated H Values for Seamless Pipe

NPS DN Specified Outside
Specified Wall
Thickness, in.
[mm]
Distance, in. [mm],
Between Plates “H ” by
Formula: H = (1 + e) t/(e + t/D)
Grade A Grade B

21⁄2 65 2.875 [73.0] 0.203 [5.16] 1.378 [35.0] 1.545 [39.2]

0.276 [7.01] 1.618 [41.1] 1.779 [45.2]

3 80 3.500 [88.9] 0.216 [5.49] 1.552 [39.4] 1.755 [44.6]

0.300 [7.62] 1.861 [47.3] 2.062 [52.4]

31⁄2 90 4.000 [101.6] 0.226 [5.74] 1.682 [42.7] 1.912 [48.6]

0.318 [8.08] 2.045 [51.9] 2.276 [57.8]

4 100 4.500 [114.3] 0.237 [6.02] 1.811 [46.0] 2.067 [52.5]

0.337 [8.56] 2.228 [56.6] 2.489 [63.2]

X2. TABLES FOR DIMENSIONAL AND CERTAIN MECHANICAL REQUIREMENTS

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5 125 5.563 [141.3] 0.258 [6.55] 2.062 [52.4] 2.372 [60.2]

0.375 [9.52] 2.597 [66.0] 2.920 [74.2]

6 150 6.625 [168.3] 0.280 [7.11] 2.308 [58.6] 2.669 [67.8]

0.432 [10.97] 3.034 [77.1] 3.419 [86.8]

8 200 8.625 [219.1] 0.277 [7.04] 2.473 [62.8] 2.902 [73.7]

0.322 [8.18] 2.757 [70.0] 3.210 [81.5]
0.500 [12.70] 3.683 [93.5] 4.181 [106.2]

10 250 10.750 [273.0] 0.279 [7.09]A 2.623 [66.6] 3.111 [79.0]

0.307 [7.80] 2.823 [71.7] 3.333 [84.7]
0.365 [9.27] 3.210 [81.5] 3.757 [95.4]
0.500 [12.70] 3.993 [101.4] 4.592 [116.6]

12 300 12.750 [323.8] 0.300 [7.62] 3.105 [78.9] 3.683 [93.5]

0.375 [9.52] 3.423 [86.9] 4.037 [102.5]
0.500 [12.70] 4.218 [107.1] 4.899 [124.4]

14 350 14.000 [355.6] 0.375 [9.52] 3.500 [88.9] 4.146 [105.3]

0.500 [12.70] 4.336 [110.1] 5.061 [128.5]

16 400 16.000 [406.4] 0.375 [9.52] 3.603 [91.5] 4.294 [109.1]

0.500 [12.70] 4.494 [114.1] 5.284 [134.2]

18 450 18.000 [457] 0.375 [9.52] 3.688 [93.7] 4.417 [112.2]

0.500 [12.70] 4.628 [117.6] 5.472 [139.0]

20 500 20.000 [508] 0.375 [9.52] 3.758 [95.5] 4.521 [114.8]

0.500 [12.70] 4.740 [120.4] 5.632 [143.1]

24 600 24.000 [610] 0.375 [9.52] 3.869 [98.3] 4.686 [119.0]

0.500 [12.70] 4.918 [124.9] 5.890 [149.6]
A Special order only.

TABLE X2.2 Dimensions, Weights (Masses) per Unit Length, and Test Pressures for Plain-End Pipe

Specified Specified Nominal Weight (Mass)

NPS DN Outside Wall Thickness, per Unit Length, Plain
Weight Class Schedule No. Test Pressure,A psi [kPa]
Designator Designator Diameter, in. [mm] End, lb/ft [kg/m]
in. [mm]
Grade A Grade B

⁄
18 6 0.405 [10.3] 0.068 [1.73] 0.24 [0.37] STD 40 700 [4800] 700 [4800]
0.095 [2.41] 0.31 [0.47] XS 80 850 [5900] 850 [5900]

⁄
14 8 0.540 [13.7] 0.088 [2.24] 0.43 [0.63] STD 40 700 [4800] 700 [4800]
0.119 [3.02] 0.54 [0.80] XS 80 850 [5900] 850 [5900]

⁄
38 10 0.675 [17.1] 0.091 [2.31] 0.57 [0.84] STD 40 700 [4800] 700 [4800]
0.126 [3.20] 0.74 [1.10] XS 80 850 [5900] 850 [5900]

⁄
12 15 0.840 [21.3] 0.109 [2.77] 0.85 [1.27] STD 40 700 [4800] 700 [4800]
0.147 [3.73] 1.09 [1.62] XS 80 850 [5900] 850 [5900]

0.188 [4.78] 1.31 [1.95] ... 160 900 [6200] 900 [6200]

0.294 [7.47] 1.72 [2.55] XXS ... 1000 [6900] 1000 [6900]

⁄
34 20 1.050 [26.7] 0.113 [2.87] 1.13 [1.69] STD 40 700 [4800] 700 [4800]
0.154 [3.91] 1.48 [2.20] XS 80 850 [5900] 850 [5900]

0.219 [5.56] 1.95 [2.90] ... 160 950 [6500] 950 [6500]

0.308 [7.82] 2.44 [3.64] XXS ... 1000 [6900] 1000 [6900]

1 25 1.315 [33.4] 0.133 [3.38] 1.68 [2.50] STD 40 700 [4800] 700 [4800]

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 A53/A53M − 12

0.179 [4.55] 2.17 [3.24] XS 80 850 [5900] 850 [5900]

0.250 [6.35] 2.85 [4.24] ... 160 950 [6500] 950 [6500]

0.358 [9.09] 3.66 [5.45] XXS ... 1000 [6900] 1000 [6900]

11⁄4 32 1.660 [42.2] 0.140 [3.56] 2.27 [3.39] STD 40 1200 [8300] 1300 [9000]
0.191 [4.85] 3.00 [4.47] XS 80 1800 [12 400] 1900 [13 100]

0.250 [6.35] 3.77 [5.61] ... 160 1900 [13 100] 2000 [13 800]

0.382 [9.70] 5.22 [7.77] XXS ... 2200 [15 200] 2300 [15 900]

11⁄2 40 1.900 [48.3] 0.145 [3.68] 2.72 [4.05] STD 40 1200 [8300] 1300 [9000]
0.200 [5.08] 3.63 [5.41] XS 80 1800 [12 400] 1900 [13 100]

0.281 [7.14] 4.86 [7.25] ... 160 1950 [13 400] 2050 [14 100]

0.400 [10.16] 6.41 [9.56] XXS ... 2200 [15 200] 2300 [15 900]

2 50 2.375 [60.3] 0.154 [3.91] 3.66 [5.44] STD 40 2300 [15 900] 2500 [17 200]
0.218 [5.54] 5.03 [7.48] XS 80 2500 [17 200] 2500 [17 200]

0.344 [8.74] 7.47 [11.11] ... 160 2500 [17 200] 2500 [17 200]

0.436 [11.07] 9.04 [13.44] XXS ... 2500 [17 200] 2500 [17 200]

21⁄2 65 2.875 [73.0] 0.203 [5.16] 5.80 [8.63] STD 40 2500 [17 200] 2500 [17 200]
0.276 [7.01] 7.67 [11.41] XS 80 2500 [17 200] 2500 [17 200]

0.375 [9.52] 10.02 [14.90] ... 160 2500 [17 200] 2500 [17 200]

0.552 [14.02] 13.71 [20.39] XXS ... 2500 [17 200] 2500 [17 200]

3 80 3.500 [88.9] 0.125 [3.18] 4.51 [6.72] ... ... 1290 [8900] 1500 [1000]
0.156 [3.96] 5.58 [8.29] ... ... 1600 [11 000] 1870 [12 900]

0.188 [4.78] 6.66 [9.92] ... ... 1930 [13 330] 2260 [15 600]

0.216 [5.49] 7.58 [11.29] STD 40 2220 [15 300] 2500 [17 200]

0.250 [6.35] 8.69 [12.93] ... ... 2500 [17 200] 2500 [17 200]

0.281 [7.14] 9.67 [14.40] ... ... 2500 [17 200] 2500 [17 200]

0.300 [7.62] 10.26 [15.27] XS 80 2500 [17 200] 2500 [17 200]

0.438 [11.13] 14.34 [21.35] ... 160 2500 [17 200] 2500 [17 200]

0.600 [15.24] 18.60 [27.68] XXS ... 2500 [17 200] 2500 [17 200]

31⁄2 90 4.000 [101.6] 0.125 [3.18] 5.18 [7.72] ... ... 1120 [7700] 1310 [19 000]
0.156 [3.96] 6.41 [9.53] ... ... 1400 [6700] 1640 [11 300]

0.188 [4.78] 7.66 [11.41] ... ... 1690 [11 700] 1970 [13 600]

0.226 [5.74] 9.12 [13.57] STD 40 2030 [14 000] 2370 [16 300]

0.250 [6.35] 10.02 [14.92] ... ... 2250 [15 500] 2500 [17 200]

0.281 [7.14] 11.17 [16.63] ... ... 2500 [17 200] 2500 [17 200]

0.318 [8.08] 12.52 [18.63] XS 80 2800 [19 300] 2800 [19 300]

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 A53/A53M − 12

4 100 4.500 [114.3] 0.125 [3.18] 5.85 [8.71] ... ... 1000 [6900] 1170 [8100]
0.156 [3.96] 7.24 [10.78] ... ... 1250 [8600] 1460 [10 100]

0.188 [4.78] 8.67 [12.91] ... ... 1500 [10 300] 1750 [12 100]

0.219 [5.56] 10.02 [14.91] ... ... 1750 [12 100] 2040 [14 100]

0.237 [6.02] 10.80 [16.07] STD 40 1900 [13 100] 2210 [15 200]

0.250 [6.35] 11.36 [16.90] ... ... 2000 [13 800] 2330 [16 100]

0.281 [7.14] 12.67 [18.87] ... ... 2250 [15 100] 2620 [18 100]

0.312 [7.92] 13.97 [20.78] ... ... 2500 [17 200] 2800 [19 300]

0.337 [8.56] 15.00 [22.32] XS 80 2700 [18 600] 2800 [19 300]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
Grade A Grade B

0.438 [11.13] 19.02 [28.32] ... 120 2800 [19 300] 2800 [19 300]

0.531 [13.49] 22.53 [33.54] ... 160 2800 [19 300] 2800 [19 300]

0.674 [17.12] 27.57 [41.03] XXS ... 2800 [19 300] 2800 [19 300]

5 125 5.563 [141.3] 0.156 [3.96] 9.02 [13.41] ... ... 1010 [7000] 1180 [8100]
0.188 [4.78] 10.80 [16.09] ... ... 1220 [8400] 1420 [9800]

0.219 [5.56] 12.51 [18.61] ... ... 1420 [9800] 1650 [11 400]

0.258 [6.55] 14.63 [21.77] STD 40 1670 [11 500] 1950 [13 400]

0.281 [7.14] 15.87 [23.62] ... ... 1820 [12 500] 2120 [14 600]

0.312 [7.92] 17.51 [26.05] ... ... 2020 [13 900] 2360 [16 300]

0.344 [8.74] 19.19 [28.57] ... ... 2230 [15 400] 2600 [17 900]

0.375 [9.52] 20.80 [30.94] XS 80 2430 [16 800] 2800 [19 300]

0.500 [12.70] 27.06 [40.28] ... 120 2800 [19 300] 2800 [19 300]

0.625 [15.88] 32.99 [49.11] ... 160 2800 [19 300] 2800 [19 300]

0.750 [19.05] 38.59 [57.43] XXS ... 2800 [19 300] 2800 [19 300]

6 150 6.625 [168.3] 0.188 [4.78] 12.94 [19.27] ... ... 1020 [7000] 1190 [8200]
0.219 [5.56] 15.00 [22.31] ... ... 1190 [8200] 1390 [9600]

0.250 [6.35] 17.04 [25.36] ... ... 1360 [9400] 1580 [10 900]

0.280 [7.11] 18.99 [28.26] STD 40 1520 [10 500] 1780 [12 300]

0.312 [7.92] 21.06 [31.32] ... ... 1700 [11 700] 1980 [13 700]

0.344 [8.74] 23.10 [34.39] ... ... 1870 [12 900] 2180 [15 000]

0.375 [9.52] 25.05 [37.28] ... ... 2040 [14 100] 2380 [16 400]

0.432 [10.97] 28.60 [42.56] XS 80 2350 [16 200] 2740 [18 900]

0.562 [14.27] 36.43 [54.20] ... 120 2800 [19 300] 2800 [19 300]

0.719 [18.26] 45.39 [67.56] ... 160 2800 [19 300] 2800 [19 300]

0.864 [21.95] 53.21 [79.22] XXS ... 2800 [19 300] 2800 [19 300]

8 200 8.625 [219.1] 0.188 [4.78] 16.96 [25.26] ... ... 780 [5400] 920 [6300]
0.203 [5.16] 18.28 [27.22] ... ... 850 [5900] 1000 [6900]

0.219 [5.56] 19.68 [29.28] ... ... 910 [6300] 1070 [7400]

0.250 [6.35] 22.38 [33.31] ... 20 1040 [7200] 1220 [8400]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
0.277 [7.04] 24.72 [36.31] ... 30 1160 [7800] 1350 [9300]

0.312 [7.92] 27.73 [41.24] ... ... 1300 [9000] 1520 [10 500]

0.322 [8.18] 28.58 [42.55] STD 40 1340 [9200] 1570 [10 800]

0.344 [8.74] 30.45 [45.34] ... ... 1440 [9900] 1680 [11 600]

0.375 [9.52] 33.07 [49.20] ... ... 1570 [10 800] 1830 [12 600]

0.406 [10.31] 35.67 [53.08] ... 60 1700 [11 700] 2000 [13 800]

0.438 [11.13] 38.33 [57.08] ... ... 1830 [12 600] 2130 [14 700]

0.500 [12.70] 43.43 [64.64] XS 80 2090 [14 400] 2430 [16 800]

0.594 [15.09] 51.00 [75.92] ... 100 2500 [17 200] 2800 [19 300]

0.719 [18.26] 60.77 [90.44] ... 120 2800 [19 300] 2800 [19 300]

0.812 [20.62] 67.82 [100.92] ... 140 2800 [19 300] 2800 [19 300]

0.875 [22.22] 72.49 [107.88] XXS ... 2800 [19 300] 2800 [19 300]

0.906 [23.01] 74.76 [111.27] ... 160 2800 [19 300] 2800 [19 300]

10 250 10.750 [273.0] 0.188 [4.78] 21.23 [31.62] ... ... 630 [4300] 730 [5000]
0.203 [5.16] 22.89 [34.08] ... ... 680 [4700] 800 [5500]

0.219 [5.56] 24.65 [36.67] ... ... 730 [5000] 860 [5900]

0.250 [6.35] 28.06 [41.75] ... 20 840 [5800] 980 [6800]

0.279 [7.09] 31.23 [46.49] ... ... 930 [6400] 1090 [7500]

0.307 [7.80] 34.27 [51.01] ... 30 1030 [7100] 1200 [8300]

0.344 [8.74] 38.27 [56.96] ... ... 1150 [7900] 1340 [9200]

0.365 [9.27] 40.52 [60.29] STD 40 1220 [8400] 1430 [9900]

0.438 [11.13] 48.28 [71.87] ... ... 1470 [10 100] 1710 [11 800]

0.500 [12.70] 54.79 [81.52] XS 60 1670 [11 500] 1950 [13 400]

0.594 [15.09] 64.49 [95.97] ... 80 1990 [13 700] 2320 [16 000]

0.719 [18.26] 77.10 [114.70] ... 100 2410 [16 600] 2800 [19 300]

0.844 [21.44] 89.38 [133.00] ... 120 2800 [19 300] 2800 [19 300]

1.000 [25.40] 104.23 [155.09] XXS 140 2800 [19 300] 2800 [19 300]

1.125 [28.57] 115.75 [172.21] ... 160 2800 [19 300] 2800 [19 300]

12 300 12.750 [323.8] 0.203 [5.16] 27.23 [40.55] ... ... 570 [3900] 670 [4600]
0.219 [5.56] 29.34 [43.63] ... ... 620 [4300] 720 [5000]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
0.250 [6.35] 33.41 [49.71] ... 20 710 [4900] 820 [5700]

0.281 [7.14] 37.46 [55.75] ... ... 790 [5400] 930 [6400]

0.312 [7.92] 41.48 [61.69] ... ... 880 [6100] 1030 [7100]

0.330 [8.38] 43.81 [65.18] ... 30 930 [6400] 1090 [7500]

0.344 [8.74] 45.62 [67.90] ... ... 970 [6700] 1130 [7800]

0.375 [9.52] 49.61 [73.78] STD ... 1060 [7300] 1240 [8500]

0.406 [10.31] 53.57 [79.70] ... 40 1150 [7900] 1340 [9200]

Grade A Grade B

0.438 [11.13] 57.65 [85.82] ... ... 1240 [8500] 1440 [9900]

0.500 [12.70] 65.48 [97.43] XS ... 1410 [9700] 1650 [11 400]

0.562 [14.27] 73.22 [108.92] ... 60 1590 [11 000] 1850 [12 800]

0.688 [17.48] 88.71 [132.04] ... 80 1940 [13 400] 2270 [15 700]

0.844 [21.44] 107.42 [159.86] ... 100 2390 [16 500] 2780 [19 200]

1.000 [25.40] 125.61 [186.91] XXS 120 2800 [19 300] 2800 [19 300]

1.125 [28.57] 139.81 [208.00] ... 140 2800 [19 300] 2800 [19 300]

1.312 [33.32] 160.42 [238.68] ... 160 2800 [19 300] 2800 [19 300]

14 350 14.000 [355.6] 0.210 [5.33] 30.96 [46.04] ... ... 540 [3700] 630 [4300]
0.219 [5.56] 32.26 [47.99] ... ... 560 [3900] 660 [4500]

0.250 [6.35] 36.75 [54.69] ... 10 640 [4400] 750 [5200]

0.281 [7.14] 41.21 [61.35] ... ... 720 [5000] 840 [5800]

0.312 [7.92] 45.65 [67.90] ... 20 800 [5500] 940 [6500]

0.344 [8.74] 50.22 [74.76] ... ... 880 [6100] 1030 [7100]

0.375 [9.52] 54.62 [81.25] STD 30 960 [6600] 1120 [7700]

0.438 [11.13] 63.50 [94.55] ... 40 1130 [7800] 1310 [9000]

0.469 [11.91] 67.84 [100.94] ... ... 1210 [8300] 1410 [9700]

0.500 [12.70] 72.16 [107.39] XS ... 1290 [8900] 1500 [10 300]

0.594 [15.09] 85.13 [126.71] ... 60 1530 [10 500] 1790 [12 300]

0.750 [19.05] 106.23 [158.10] ... 80 1930 [13 300] 2250 [15 500]

0.938 [23.83] 130.98 [194.96] ... 100 2410 [16 600] 2800 [19 300]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
1.094 [27.79] 150.93 [224.65] ... 120 2800 [19 300] 2800 [19 300]

1.250 [31.75] 170.37 [253.56] ... 140 2800 [19 300] 2800 [19 300]

1.406 [35.71] 189.29 [281.70] ... 160 2800 [19 300] 2800 [19 300]

2.000 [50.80] 256.56 [381.83] ... ... 2800 [19 300] 2800 [19 300]

2.125 [53.97] 269.76 [401.44] ... ... 2800 [19 300] 2800 [19 300]

2.200 [55.88] 277.51 [413.01] ... ... 2800 [19 300] 2800 [19 300]

2.500 [63.50] 307.34 [457.40] ... ... 2800 [19 300] 2800 [19 300]

16 400 16.000 [406.4] 0.219 [5.56] 36.95 [54.96] ... ... 490 [3400] 570 [3900]
0.250 [6.35] 42.09 [62.64] ... 10 560 [3900] 660 [4500]

0.281 [7.14] 47.22 [70.30] ... ... 630 [4300] 740 [5100]

0.312 [7.92] 52.32 [77.83] ... 20 700 [4800] 820 [5700]

0.344 [8.74] 57.57 [85.71] ... ... 770 [5300] 900 [6200]

0.375 [9.52] 62.64 [93.17] STD 30 840 [5800] 980 [6800]

0.438 [11.13] 72.86 [108.49] ... ... 990 [6800] 1150 [7900]

0.469 [11.91] 77.87 [115.86] ... ... 1060 [7300] 1230 [8500]

0.500 [12.70] 82.85 [123.30] XS 40 1120 [7700] 1310 [9000]

0.656 [16.66] 107.60 [160.12] ... 60 1480 [10 200] 1720 [11 900]

0.844 [21.44] 136.74 [203.53] ... 80 1900 [13 100] 2220 [15 300]

1.031 [26.19] 164.98 [245.56] ... 100 2320 [16 000] 2710 [18 700]

1.219 [30.96] 192.61 [286.64] ... 120 2740 [18 900] 2800 [19 300]

1.438 [36.53] 223.85 [333.19] ... 140 2800 [19 300] 2800 [19 300]

1.594 [40.49] 245.48 [365.35] ... 160 2800 [19 300] 2800 [19 300]

18 450 18.000 [457] 0.250 [6.35] 47.44 [70.60] ... 10 500 [3400] 580 [4000]
0.281 [7.14] 53.23 [79.24] ... ... 560 [3900] 660 [4500]

0.312 [7.92] 58.99 [87.75] ... 20 620 [4300] 730 [5000]

0.344 [8.74] 64.93 [96.66] ... ... 690 [4800] 800 [5500]

0.375 [9.52] 70.65 [105.10] STD ... 750 [5200] 880 [6100]

0.406 [10.31] 76.36 [113.62] ... ... 810 [5600] 950 [6500]

0.438 [11.13] 82.23 [122.43] ... 30 880 [6100] 1020 [7000]

0.469 [11.91] 87.89 [130.78] ... ... 940 [6500] 1090 [7500]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
0.500 [12.70] 93.54 [139.20] XS ... 1000 [6900] 1170 [8100]

0.562 [14.27] 104.76 [155.87] ... 40 1120 [7700] 1310 [9000]

0.750 [19.05] 138.30 [205.83] ... 60 1500 [10 300] 1750 [12 100]

0.938 [23.83] 171.08 [254.67] ... 80 1880 [13 000] 2190 [15 100]

1.156 [29.36] 208.15 [309.76] ... 100 2310 [15 900] 2700 [18 600]

1.375 [34.92] 244.37 [363.64] ... 120 2750 [19 000] 2800 [19 300]

1.562 [39.67] 274.48 [408.45] ... 140 2800 [19 300] 2800 [19 300]

1.781 [45.24] 308.79 [459.59] ... 160 2800 [19 300] 2800 [19 300]

20 500 20.000 [508] 0.250 [6.35] 52.78 [78.55] ... 10 450 [3100] 520 [3600]
0.281 [7.14] 59.23 [88.19] ... ... 510 [3500] 590 [4100]

0.312 [7.92] 65.66 [97.67] ... ... 560 [3900] 660 [4500]

0.344 [8.74] 72.28 [107.60] ... ... 620 [4300] 720 [5000]

0.375 [9.52] 78.67 [117.02] STD 20 680 [4700] 790 [5400]

0.406 [10.31] 84.04 [126.53] ... ... 730 [5000] 850 [5900]

0.438 [11.13] 91.59 [136.37] ... ... 790 [5400] 920 [6300]

0.469 [11.91] 97.92 [145.70] ... ... 850 [5900] 950 [6500]

Grade A Grade B

0.500 [12.70] 104.23 [155.12] XS 30 900 [6200] 1050 [7200]

0.594 [15.09] 123.23 [183.42] ... 40 1170 [8100] 1250 [8600]

0.812 [20.62] 166.56 [247.83] ... 60 1460 [10 100] 1710 [11 800]

1.031 [26.19] 209.06 [311.17] ... 80 1860 [12 800] 2170 [15 000]

1.281 [32.54] 256.34 [381.53] ... 100 2310 [15 900] 2690 [18 500]

1.500 [38.10] 296.65 [441.49] ... 120 2700 [18 600] 2800 [19 300]

1.750 [44.45] 341.41 [508.11] ... 140 2800 [19 300] 2800 [19 300]

1.969 [50.01] 379.53 [564.81] ... 160 2800 [19 300] 2800 [19 300]

24 600 24.000 [610] 0.250 [6.35] 63.47 [94.46] ... 10 380 [2600] 440 [3000]
0.281 [7.14] 71.25 [106.08] ... ... 420 [2900] 490 [3400]

0.312 [7.92] 79.01 [117.51] ... ... 470 [3200] 550 [3800]

0.344 [8.74] 86.99 [129.50] ... ... 520 [3600] 600 [4100]

0.375 [9.52] 94.71 [140.88] STD 20 560 [3900] 660 [4500]

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 Wall Thickness, per Unit Length, Plain Weight Class Schedule No. Test Pressure, psi [kPa]
Designator Designator Diameter, in. [mm]
[kg/m]
A53/A53M−12
End, lb/ft

in. [mm]
TABLEX2.2 Continued
Specified
Specified NominalWeight(Mass)
NPS DN Outside A
0.406 [10.31] 102.40 [152.37] ... ... 610 [4200] 710 [4900]

0.438 [11.13] 110.32 [164.26] ... ... 660 [4500] 770 [5300]

0.469 [11.91] 117.98 [175.54] ... ... 700 [4800] 820 [5700]

0.500 [12.70] 125.61 [186.94] XS ... 750 [5200] 880 [6100]

0.562 [14.27] 140.81 [209.50] ... 30 840 [5800] 980 [6800]

0.688 [17.48] 171.45 [255.24] ... 40 1030 [7100] 1200 [8300]

0.938 [23.83] 231.25 [344.23] ... ... 1410 [9700] 1640 [11 300]

0.969 [24.61] 238.57 [355.02] ... 60 1450 [10 000] 1700 [11 700]

1.219 [30.96] 296.86 [441.78] ... 80 1830 [12 600] 2130 [14 700]

1.531 [38.89] 367.74 [547.33] ... 100 2300 [15 900] 2680 [18 500]

1.812 [46.02] 429.79 [639.58] ... 120 2720 [18 800] 2800 [19 300]

2.062 [52.37] 483.57 [719.63] ... 140 2800 [19 300] 2800 [19 300]

2.344 [59.54] 542.64 [807.63] ... 160 2800 [19 300] 2800 [19 300]

26 650 26.000 [660] 0.250 [6.35] 68.82 [102.42] ... ... 350 [2400] 400 [2800]
0.281 [7.14] 77.26 [115.02] ... ... 390 [2700] 450 [3100]

0.312 [7.92] 85.68 [127.43] ... 10 430 [3000] 500 [3400]

0.344 [8.74] 94.35 [140.45] ... ... 480 [3300] 560 [3900]

0.375 [9.52] 102.72 [152.80] STD ... 520 [3600] 610 [4200]

0.406 [10.31] 111.08 [165.28] ... ... 560 [3900] 660 [4500]

0.438 [11.13] 119.69 [178.20] ... ... 610 [4200] 710 [4900]

0.469 [11.91] 128.00 [190.46] ... ... 650 [4500] 760 [5200]

0.500 [12.70] 136.30 [202.85] XS 20 690 [4800] 810 [5600]

0.562 [14.27] 152.83 [227.37] ... ... 780 [5400] 910 [6300]

A The minimum test pressure for outside diameters and wall thicknesses not listed shall be computed by the formula given below. The computed test pressure shall be
used in all cases, except as follows:
(1) For specified wall thicknesses greater than the heaviest specified wall thickness listed in this table for the applicable specified outside diameter, the test
pressure shall be the highest value listed for the applicable specified outside diameter and grade.
(2) For pipe smaller than NPS 2 [DN 50] with a specified wall thickness less than the lightest specified wall thickness listed in this table for the applicable
specified outside diameter and grade.
(3) For all sizes of Grade A and B pipe smaller than NPS 2 [DN 50], the test pressures were assigned arbitrarily. Test pressures for intermediate specified
outside diameters need not exceed those given in this table for the next larger listed size. P52St/D

where: t = specified wall thickness, in. [mm], and

P = minimum hydrostatic test pressure, psi [kPa], D = specified outside diameter, in. [mm].
S = 0.60 times the specified minimum yield strength, psi [kPa],

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TABLE X2.3 Dimensions, Weights (Masses) per Unit Length, and Test Pressures for Threaded and Coupled Pipe

Specified Nominal Weight

Outside (Mass) per
Specified
NPS DN Diameter, Unit Length, Weight Schedule Test Pressure, psi
Wall Thickness,
Designator Designator in. [mm] Threaded and Class No. [kPa]
in. [mm]
Coupled, lb/ft
[kg/m]
Grade A Grade B

18 ⁄ 6 0.405 [10.3] 0.068 [1.73] 0.25 [0.37] STD 40 700 [4800] 700 [4800]
0.095 [2.41] 0.32 [0.46] XS 80 850 [5900] 850 [5900]
14 ⁄ 8 0.540 [13.7]
0.088 [2.24] 0.43 [0.63] STD 40 700 [4800] 700 [4800]
0.119 [3.02] 0.54 [0.80] XS 80 850 [5900] 850 [5900]
38 ⁄ 10 0.675 [17.1]
0.091 [2.31] 0.57 [0.84] STD 40 700 [4800] 700 [4800]
0.126 [3.20] 0.74 [1.10] XS 80 850 [5900] 850 [5900]
12 ⁄ 15 0.840 [21.3] 0.109 [2.77] 0.86 [1.27] 700 [4800] 700 [4800]
40
STD XS
0.147 [3.73] 1.09 [1.62] 80 850 [5900] 850 [5900]
XXS
0.294 [7.47] 1.72 [2.54] ... 1000 [6900] 1000 [6900]
34 ⁄ 20 1.050 [26.7] 0.113 [2.87] 1.14 [1.69] 700 [4800] 700 [4800]
40
STD XS
0.154 [3.91] 1.48 [2.21] 80 850 [5900] 850 [5900]
XXS
0.308 [7.82] 2.45 [3.64] ... 1000 [6900] 1000 [6900]
1 25 1.315 [33.4] 0.133 [3.38] 1.69 [2.50] 700 [4800] 700 [4800]
40
STD XS
0.179 [4.55] 2.19 [3.25] 80 850 [5900] 850 [5900]
XXS
0.358 [9.09] 3.66 [5.45] ... 1000 [6900] 1000 [6900]
11⁄4 32 1.660 [42.2] 0.140 [3.56] 2.28 [3.40] 1000 [6900] 1100 [7600]
40
STD XS
0.191 [4.85] 3.03 [4.49] 80 1500 [10 300] 1600 [11 000]
XXS
0.382 [9.70] 5.23 [7.76] ... 1800 [12 400] 1900 [13 100]
11⁄2 40 1.900 [48.3] 0.145 [3.68] 2.74 [4.04] 1000 [6900] 1100 [7600]
40
STD XS
0.200 [5.08] 3.65 [5.39] 80 1500 [10 300] 1600 [11 000]
XXS
0.400 [10.16] 6.41 [9.56] ... 1800 [12 400] 1900 [13 100]
2 50 2.375 [60.3] 0.154 [3.91] 3.68 [5.46] 2300 [15 900] 2500 [17 200]
40
STD XS
0.218 [5.54] 5.08 [7.55] 80 2500 [17 200] 2500 [17 200]
XXS
0.436 [11.07] 9.06 [13.44] ... 2500 [17 200] 2500 [17 200]
21⁄2 65 2.875 [73.0] 0.203 [5.16] 5.85 [8.67] 2500 [17 200] 2500 [17 200]
40
STD XS
0.276 [7.01] 7.75 [11.52] 80 2500 [17 200] 2500 [17 200]
XXS
0.552 [14.02] 13.72 [20.39] ... 2500 [17 200] 2500 [17 200]
3 80 3.500 [88.9] 0.216 [5.49] 7.68 [11.35] 2200 [15 200] 2500 [17 200]
40
STD XS
0.300 [7.62] 10.35 [15.39] 80 2500 [17 200] 2500 [17 200]
XXS
0.600 [15.24] 18.60 [27.66] ... 2500 [17 200] 2500 [17 200]
31⁄2 90 4.000 [101.6]
0.226 [5.74] 9.27 [13.71] STD 40 2000 [13 800] 2400 [16 500]
0.318 [8.08] 12.67 [18.82] XS 80 2800 [19 300] 2800 [19 300]
4 100 4.500 [114.3] 0.237 [6.02] 10.92 [16.23] 1900 [13 100] 2200 [15 200]
40
STD XS
0.337 [8.56] 15.20 [22.60] 80 2700 [18 600] 2800 [19 300]
XXS
0.674 [17.12] 27.62 [41.09] ... 2800 [19 300] 2800 [19 300]
5 125 5.563 [141.3] 0.258 [6.55] 14.90 [22.07] 1700 [11 700] 1900 [13 100]
40
STD XS
0.375 [9.52] 21.04 [31.42] 80 2400 [16 500] 2800 [19 300]
XXS
0.750 [19.05] 38.63 [57.53] ... 2800 [19 300] 2800 [19 300]
6 150 6.625 [168.3] 0.280 [7.11] 19.34 [28.58] 1500 [10 300] 1800 [12 400]
40
STD XS
0.432 [10.97] 28.88 [43.05] 80 2300 [15 900] 2700 [18 600]
XXS
0.864 [21.95] 53.19 [79.18] ... 2800 [19 300] 2800 [19 300]
8 200 8.625 [219.1] 0.277 [7.04] 25.53 [38.07] 1200 [8300] 1300 [9000]
30
...
0.322 [8.18] 29.35 [43.73] 40 1300 [9000] 1600 [11 000]
STD XS
0.500 [12.70] 44.00 [65.41] 80 2100 [14 500] 2400 [16 500]
XXS
0.875 [22.22] 72.69 [107.94] ... 2800 [19 300] 2800 [19 300]
10 250 10.750 [273.0] 0.279 [7.09] 32.33 [48.80] 950 [6500] 1100 [7600]
... ...
0.307 [7.80] 35.33 [53.27] ... 30 1000 [6900] 1200 [8300]
0.365 [9.27] 41.49 [63.36] STD 40 1200 [8300] 1400 [9700]
0.500 [12.70] 55.55 [83.17] XS 60 1700 [11 700] 2000 [13 800]

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12 300 12.750 [323.8] 0.330 [8.38] 45.47 [67.72] ... 30 950 [6500] 1100 [7600]
0.375 [9.52] 51.28 [76.21] STD ... 1100 [7600] 1200 [8300]
0.500 [12.70] 66.91 [99.4] XS ... 1400 [9700] 1600 [11 000]
TABLE X2.4 Table of Minimum Permissible Wall Thicknesses on Inspection for Pipe Specified Wall Thicknesses

NOTE 1—The following equation, upon which this table is based, shall be applied to calculate minimum permissible wall thickness from specified wall
thickness:

ts × 0.875 = tm

where:
ts = specified wall thickness, in. [mm], and tm =
minimum permissible wall thickness, in. [mm].
The wall thickness is expressed to three [two] decimal places, the fourth [third] decimal place being carried forward or dropped in accordance with
Practice E29.
NOTE 2—This table is a master table covering wall thicknesses available in the purchase of different classifications of pipe, but it is not meant to imply
that all of the walls listed therein are obtainable under this specification.

Specified Wall Minimum Specified Wall Minimum Specified Wall Minimum

Thickness (ts), Permissible Wall Thickness (ts), Permissible Wall Thickness (ts), Permissible Wall
in. [mm] Thickness on in. [mm] Thickness on in. [mm] Thickness on
Inspection (tm), Inspection (tm), Inspection (tm),
in. [mm] in. [mm] in. [mm]

0.068 [1.73] 0.060 [1.52] 0.294 [7.47] 0.257 [6.53] 0.750 [19.05] 0.656 [16.66]
0.088 [2.24] 0.077 [1.96] 0.300 [7.62] 0.262 [6.65] 0.812 [20.62] 0.710 [18.03]
0.091 [2.31] 0.080 [2.03] 0.307 [7.80] 0.269 [6.83] 0.844 [21.44] 0.739 [18.77]
0.095 [2.41] 0.083 [2.11] 0.308 [7.82] 0.270 [6.86] 0.864 [21.94] 0.756 [19.20]
0.109 [2.77] 0.095 [2.41] 0.312 [7.92] 0.273 [6.93] 0.875 [22.22] 0.766 [19.46]
0.113 [2.87] 0.099 [2.51] 0.318 [8.08] 0.278 [7.06] 0.906 [23.01] 0.793 [20.14]
0.119 [3.02] 0.104 [2.64] 0.322 [8.18] 0.282 [7.16) 0.938 [23.82] 0.821 [20.85]
0.125 [3.18] 0.109 [2.77) 0.330 [8.38] 0.289 [7.34] 0.968 [24.59] 0.847 [21.51]
0.126 [3.20] 0.110 [2.79] 0.337 [8.56] 0.295 [7.49] 1.000 [25.40] 0.875 [22.22]
0.133 [3.38] 0.116 [2.95] 0.343 [8.71] 0.300 [7.62] 1.031 [26.19] 0.902 [22.91]
0.140 [3.56] 0.122 [3.10] 0.344 [8.74] 0.301 [7.65] 1.062 [26.97] 0.929 [26.30]
0.145 [3.68] 0.127 [3.23] 0.358 [9.09] 0.313 [7.95] 1.094 [27.79] 0.957 [24.31]
0.147 [3.73] 0.129 [3.28] 0.365 [9.27] 0.319 [8.10] 1.125 [28.58] 0.984 [24.99]
0.154 [3.91] 0.135 [3.43] 0.375 [9.52] 0.328 [8.33] 1.156 [29.36] 1.012 [25.70]
0.156 [3.96] 0.136 [3.45] 0.382 [9.70] 0.334 [8.48] 1.219 [30.96] 1.067 [27.08]
0.179 [4.55] 0.157 [3.99] 0.400 [10.16] 0.350 [8.89] 1.250 [31.75] 1.094 [27.79]
0.187 [4.75] 0.164 [4.17] 0.406 [10.31] 0.355 [9.02] 1.281 [32.54] 1.121 [28.47]
0.188 [4.78] 0.164 [4.17] 0.432 [10.97] 0.378 [9.60] 1.312 [33.32] 1.148 [29.16]
0.191 [4.85] 0.167 [4.24] 0.436 [11.07] 0.382 [9.70] 1.343 [34.11] 1.175 [29.85]
0.200 [5.08] 0.175 [4.44] 0.437 [11.10] 0.382 [9.70] 1.375 [34.92] 1.203 [30.56]
0.203 [5.16] 0.178 [4.52] 0.438 [11.13] 0.383 [9.73] 1.406 [35.71] 1.230 [31.24]
0.216 [5.49] 0.189 [4.80] 0.500 [12.70] 0.438 [11.13] 1.438 [36.53] 1.258 [31.95]
0.218 [5.54] 0.191 [4.85] 0.531 [13.49] 0.465 [11.81] 1.500 [38.10] 1.312 [33.32]
0.219 [5.56] 0.192 [4.88] 0.552 [14.02] 0.483 [12.27] 1.531 [38.89] 1.340 [34.04]
0.226 [5.74] 0.198 [5.03] 0.562 [14.27] 0.492 [12.50] 1.562 [39.67] 1.367 [34.72]
0.237 [6.02] 0.207 [5.26] 0.594 [15.09] 0.520 [13.21] 1.594 [40.49] 1.395 [35.43]
0.250 [6.35] 0.219 [5.56] 0.600 [15.24] 0.525 [13.34] 1.750 [44.45] 1.531 [38.89]
0.258 [6.55] 0.226 [5.74] 0.625 [15.88] 0.547 [13.89] 1.781 [45.24] 1.558 [39.57]
0.276 [7.01] 0.242 [6.15] 0.656 [16.66] 0.574 [14.58] 1.812 [46.02] 1.586 [40.28]
0.277 [7.04] 0.242 [6.15] 0.674 [17.12] 0.590 [14.99] 1.968 [49.99] 1.722 [43.74]
0.279 [7.09] 0.244 [6.20] 0.688 [17.48] 0.602 [15.29] 2.062 [52.37] 1.804 [45.82]
0.280 [7.11] 0.245 [6.22] 0.719 [18.26] 0.629 [15.98] 2.344 [59.54] 2.051 [52.10]
0.281 [7.14] 0.246 [6.25]

X3. BASIC THREADING DATA

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 A53/A53M − 12

X3.1 Fig. X3.1 is to be used with Table X3.1. Fig. X3.2 is to

be used with Table X3.2.

FIG. X3.1 Dimensions of Hand Tight Assembly for Use with Table X3.1

TABLE X3.1 Basic Threading Data for Standard-Weight Pipe, NPS 6 [DN 150] or Smaller

NOTE 1—All dimensions in this table are nominal and subject to mill tolerances.
NOTE 2—The taper of threads is 3⁄4 in./ft [62.5 mm/m] on the diameter.

Pipe Threads Coupling

NPS DN Specified Number per End of Pipe to Effective Total Pitch Diameter Specified Length, Hand Tight
Designator Designator Outside inch Hand Tight Plane, Length, Length, in. [mm] at Hand Outside min., in. [mm] Stand-Off
Diameter, in. [mm] in. [mm] Tight Plane, Diameter, (Number of
in. [mm] in. [mm] in. [mm] Threads)
D L1 L2 L4 E1 W NL A

⁄
18 6 0.405 [10.3] 27 0.1615 [4.1021] 0.2638 0.3924 0.37360 0.563 [14.3] 3
⁄4 [19] 4
[6.7005] [9.9670] [9.48944]
⁄
14 8 0.540 [13.7] 18 0.2278 [5.7861] 0.4018 0.5946 0.49163 0.719 [18.3] 11⁄8 [29] 51⁄2
[10.2057] [15.1028] [12.48740]
⁄
38 10 0.675 [17.1] 18 0.240 [6.096] 0.4078 0.6006 0.62701 0.875 [22.2] 11⁄8 [29] 5
[10.3581] [15.2552] [15.92605]
0.5337 0.7815 0.77843
⁄
12 15 0.840 [21.3] 14 0.320 [8.128] [13.5560] [19.8501] [19.77212] 1.063 [27.0] 11⁄2 [38] 5

⁄
34 20 1.050 [26.7] 14 0.339 [8.611] 0.5457 0.7935 0.98887 1.313 [33.4] 1 ⁄16 [40]
9
5
[13.8608] [20.1549] [25.11730]
1 25 1.315 [33.4] 111⁄2 0.400 [10.160] 0.6828 0.9845 1.23863 1.576 [40.0] 115⁄16 [49] 5
[17.3431] [25.0063] [31.46120]
0.7068 1.0085 1.58338
11⁄4 32 1.660 [42.2] 111⁄2 0.420 [10.668] [17.9527] [25.6159] [40.21785] 1.900 [48.3] 2 [50] 5

1 ⁄2
1
40 1.900 [48.3] 11 ⁄2
1
0.420 [10.668] 0.7235 1.0252 1.82234 2.200 [55.9] 2 [50] 51⁄2
[18.3769] [26.0401] [46.28744]
2 50 2.375 [60.3] 111⁄2 0.436 [11.074] 0.7565 1.0582 2.29627 2.750 [69.8] 21⁄16 [52] 51⁄2
[19.2151] [26.8783] [58.32526]
1.1376 1.5712 2.76216
21⁄2 65 2.875 [73.0] 8 0.682 [17.323] [28.8950] [39.9085] [70.15886] 3.250 [82.5] 31⁄16 [78] 51⁄2

3 80 3.500 [88.9] 8 0.766 [19.456] 1.2000 1.6337 3.38850 4.000 [101.6] 33⁄16 [81] 51⁄2
[30.4800] [41.4960] [86.06790]
31⁄2 90 4.000 [101.6] 8 0.821 [20.853] 1.2500 1.6837 3.88881 4.625 [117.5] 35⁄16 [84] 51⁄2
[31.7500] [42.7660] [98.77577]
1.3000 1.7337 4.38713
4 100 4.500 [114.3] 8 0.844 [21.438] [33.0200] [44.0360] [111.43310] 5.000 [127.0] 37⁄16 [87] 5

5 125 5.563 [141.3] 8 0.937 [23.800] 1.4063 1.8400 5.44929 6.296 [159.9] 3 ⁄16 [94]
11
5
[35.7200] [46.7360] [138.41200]
6 150 6.625 [168.3] 8 0.958 [24.333] 1.5125 1.9462 6.50597 7.390 [187.7] 315⁄16 [100] 6
[38.4175] [49.4335] [165.25164]

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 A53/A53M − 12

FIG. X3.2 Dimensions of Hand Tight Assembly for Use with Table X3.2

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 TABLE X3.2 Basic Threading Data for Standard-Weight Pipe, NPS 8 [DN 200] or Larger, and all Sizes of Extra-Strong and Double-Extra-Strong
Weight Pipe

NOTE 1—The taper of threads is 3⁄4 in./ft [62.5 mm/m] on the diameter.
Pipe Threads Coupling

NPS DN Specified Number End of Effective [mm] Total [mm] Pitch Specified Length, [mm] Hand
Desig- Outside per Pipe to Length, Length, Diameter Outside min, Tight
Designator Diameter, Inch Hand in. in. at Hand Diameter in. Stand-
in. Tight Tight , in. Off A53/A53M
nator Plane, Plane, (Number
in. in. of
20 [mm] [mm] [mm] [mm] Threads)
D L1 L2 L4 E1 W NL

⁄
18 6 0.405 [10.3] 27 0.1615 [4.1021] 0.2638 [6.7005] 0.3924 [9.9670] 0.37360 [9.48944] 0.563 [14.3] 11⁄16 [27] 3
⁄
14 8 0.540 [13.7] 18 0.2278 [5.7861] 0.4018 [10.2057] 0.5946 [15.1028] 0.49163 [12.48740] 0.719 [18.3] 15⁄8 [41] 3
⁄
38 10 0.675 [17.1] 18 0.240 [6.096] 0.4078 [10.3581] 0.6006 [15.2552] 0.62701 [15.92605] 0.875 [22.2] 15⁄8 [41] 3
⁄
12 15 0.840 [21.3] 14 0.320 [8.128] 0.5337 [13.5560] 0.7815 [19.8501] 0.77843 [19.77212] 1.063 [27.0] 21⁄8 [54] 3
⁄
34 20 1.050 [26.7] 141⁄2 0.339 [8.611] 0.5457 [13.8608] 0.7935 [20.1549] 0.98887 [25.11730] 1.313 [33.4] 21⁄8 [54] 3
1 25 1.315 [33.4] 11 0.400 [10.160] 0.6828 [17.3431] 0.9845 [25.0063] 1.23863 [31.46120] 1.576 [40.0] 25⁄8 [67] 3
1 ⁄4
1
32 1.660 [42.2] 11 ⁄2
1
0.420 [10.668] 0.7068 [17.9527] 1.0085 [25.6159] 1.58338 [40.21785] 2.054 [52.2] 2 ⁄4
3
[70] 3
11⁄2 40 1.900 [48.3] 111⁄2 0.420 [10.668] 0.7235 [18.3769] 1.0252 [26.0401] 1.82234 [46.28744] 2.200 [55.9] 23⁄4 [70] 3
2 50 2.375 [60.3] 111⁄2 0.436 [11.074] 0.7565 [19.2151] 1.0582 [26.8783] 2.29627 [58.32526] 2.875 [73.0] 27⁄8 [73] 3
21⁄2 65 2.875 [73.0] 8 0.682 [17.323] 1.1375 [28.8950] 1.5712 [39.9085] 2.76216 [70.15886] 3.375 [85.7] 41⁄8 [105] 2
3 80 3.500 [88.9] 8 0.766 [19.456] 1.2000 [30.4800] 1.6337 [41.4960] 3.38850 [86.06790] 4.000 [101.6] 41⁄4 [108] 2
31⁄2 90 4.000 [101.6] 8 0.821 [20.853] 1.2500 [31.7500] 1.6837 [42.7660] 3.88881 [98.77577] 4.625 [117.5] 43⁄8 [111] 2
4 100 4.500 [114.3] 8 0.844 [21.438] 1.3000 [33.0200] 1.7337 [44.0360] 4.38713 [111.43310] 5.200 [132.1] 41⁄2 [114] 2
5 125 5.563 [141.3] 8 0.937 [23.800] 1.4063 [35.7200] 1.8400 [46.7360] 5.44929 [138.41200] 6.296 [159.9] 45⁄8 [117] 2
6 150 6.625 [168.3] 8 0.958 [24.333] 1.5125 [38.4175] 1.9462 [49.4335] 6.50597 [165.25164] 7.390 [187.7] 47⁄8 [124] 2
8 200 8.625 [219.1] 8 1.063 [27.000] 1.7125 [43.4975] 2.1462 [54.5135] 8.50003 [215.90076] 9.625 [244.5] 51⁄4 [133] 2
10 250 10.750 [273.0] 8 1.210 [30.734] 1.9250 [48.8950] 2.3587 [59.9110] 10.62094 [269.77188] 11.750 [298.4] 53⁄4 [146] 2
12 300 12.750 [323.8] 8 1.360 [34.544] 2.1250 [53.9750] 2.5587 [64.9910] 12.61781 [320.49237] 14.000 [355.6] 61⁄8 [156] 2
14 350 14.000 [355.6] 8 1.562 [39.675] 2.2500 [57.1500] 2.6837 [68.1660] 13.87263 [352.36480] 15.000 [381.0] 63⁄8 [162] 2
16 400 16.000 [406.4] 8 1.812 [46.025] 2.4500 [62.2300] 2.8837 [73.2460] 15.87575 [403.24405] 17.000 [432] 63⁄4 [171] 2
18 450 18.000 [457] 8 2.000 [50.800] 2.6500 [67.3100] 3.0837 [78.3260] 17.87500 [454.02500] 19.000 [483] 71⁄8 [181] 2
20 500 20.000 [508] 8 2.125 [53.975] 2.8500 [72.3900] 3.2837 [83.4060] 19.87031 [504.70587] 21.000 [533] 75⁄8 [194] 2
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 A53/A53M − 12

X4. ELONGATION VALUES

X4.1 Tabulated in Table X4.1 are the minimum elongation

values in inch-pound units, calculated using the equation
given in Table 2.
TABLE X4.1 Elongation Values
Specified Wall Thickness, in. Elongation in 2 in., min, %

Tension Test Specimen Specified Minimum Tensile Strength, psi

Area, A, in.2

3
⁄4-in. 1-in. 11⁄2-in.
Specimen Specimen Specimen 48 000 60 000
0.75 and 0.994 and 0.746 and 0.497 and 36 30
greater greater greater greater
0.74 0.980–0.993 0.735–0.745 0.490–0.496 36 29
0.73 0.967–0.979 0.726–0.734 0.484–0.489 36 29
0.72 0.954–0.966 0.715–0.725 0.477–0.483 36 29
0.71 0.941–0.953 0.706–0.714 0.471–0.476 36 29
0.70 0.927–0.940 0.695–0.705 0.464–0.470 36 29
0.69 0.914–0.926 0.686–0.694 0.457–0.463 36 29
0.68 0.900–0.913 0.675–0.685 0.450–0.456 35 29
0.67 0.887–0.899 0.666–0.674 0.444–0.449 35 29
0.66 0.874–0.886 0.655–0.665 0.437–0.443 35 29
0.65 0.861–0.873 0.646–0.654 0.431–0.436 35 29
0.64 0.847–0.860 0.635–0.645 0.424–0.430 35 29
0.63 0.834–0.846 0.626–0.634 0.417–0.423 35 29
0.62 0.820–0.833 0.615–0.625 0.410–0.416 35 28
0.61 0.807–0.819 0.606–0.614 0.404–0.409 35 28
0.60 0.794–0.806 0.595–0.605 0.397–0.403 35 28
0.59 0.781–0.793 0.586–0.594 0.391–0.396 34 28
0.58 0.767–0.780 0.575–0.585 0.384–0.390 34 28
0.57 0.754–0.766 0.566–0.574 0.377–0.383 34 28
0.56 0.740–0.753 0.555–0.565 0.370–0.376 34 28
0.55 0.727–0.739 0.546–0.554 0.364–0.369 34 28
0.54 0.714–0.726 0.535–0.545 0.357–0.363 34 28
0.53 0.701–0.713 0.526–0.534 0.351–0.356 34 28
0.52 0.687–0.700 0.515–0.525 0.344–0.350 34 27
0.51 0.674–0.686 0.506–0.514 0.337–0.343 33 27
0.50 0.660–0.673 0.495–0.505 0.330–0.336 33 27
0.49 0.647–0.659 0.486–0.494 0.324–0.329 33 27
0.48 0.634–0.646 0.475–0.485 0.317–0.323 33 27
0.47 0.621–0.633 0.466–0.474 0.311–0.316 33 27
0.46 0.607–0.620 0.455–0.465 0.304–0.310 33 27
0.45 0.594–0.606 0.446–0.454 0.297–0.303 33 27
0.44 0.580–0.593 0.435–0.445 0.290–0.296 32 27
0.43 0.567–0.579 0.426–0.434 0.284–0.289 32 26
0.42 0.554–0.566 0.415–0.425 0.277–0.283 32 26
0.41 0.541–0.553 0.406–0.414 0.271–0.276 32 26
0.40 0.527–0.540 0.395–0.405 0.264–0.270 32 26
0.39 0.514–0.526 0.386–0.394 0.257–0.263 32 26
0.38 0.500–0.513 0.375–0.385 0.250–0.256 32 26
0.37 0.487–0.499 0.366–0.374 0.244–0.249 31 26
0.36 0.474–0.486 0.355–0.365 0.237–0.243 31 26
0.35 0.461–0.473 0.346–0.354 0.231–0.236 31 25
0.34 0.447–0.460 0.335–0.345 0.224–0.230 31 25
0.33 0.434–0.446 0.326–0.334 0.217–0.223 31 25
0.32 0.420–0.433 0.315–0.325 0.210–0.216 30 25
0.31 0.407–0.419 0.306–0.314 0.204–0.209 30 25
0.30 0.394–0.406 0.295–0.305 0.197–0.203 30 25

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 A53/A53M − 12

0.29 0.381–0.393 0.286–0.294 0.191–0.196 30 24

0.28 0.367–0.380 0.275–0.285 0.184–0.190 30 24
0.27 0.354–0.366 0.266–0.274 0.177–0.183 29 24
0.26 0.340–0.353 0.255–0.265 0.170–0.176 29 24
0.25 0.327–0.339 0.246–0.254 0.164–0.169 29 24
0.24 0.314–0.326 0.235–0.245 0.157–0.163 29 24
0.23 0.301–0.313 0.226–0.234 0.151–0.156 29 23
0.22 0.287–0.300 0.215–0.225 0.144–0.150 28 23
0.21 0.274–0.286 0.260–0.214 0.137–0.143 28 23
0.20 0.260–0.273 0.195–0.205 0.130–0.136 28 23
0.19 0.247–0.259 0.186–0.194 0.124–0.129 27 22
0.18 0.234–0.246 0.175–0.185 0.117–0.123 27 22
0.17 0.221–0.233 0.166–0.174 0.111–0.116 27 22
0.16 0.207–0.220 0.155–0.165 0.104–0.110 27 22
0.15 0.194–0.206 0.146–0.154 0.097–0.103 26 21
TABLE X4.1 Continued
Specified Wall Thickness, in. Elongation in 2 in., min, %

Tension Test Specimen Specified Minimum Tensile Strength, psi

Area, A, in.2

3
⁄4-in. 1-in. 11⁄2-in.
Specimen Specimen Specimen 48 000 60 000
0.14 0.180–0.193 0.135–0.145 0.091–0.096 26 21
0.13 0.167–0.179 0.126–0.134 0.084–0.090 25 21
0.12 0.154–0.166 0.115–0.125 0.077–0.083 25 20
0.11 0.141–0.153 0.106–0.114 0.071–0.076 25 20
0.10 0.127–0.140 0.095–0.105 0.064–0.070 24 20
0.09 0.114–0.126 0.086–0.094 0.057–0.063 24 19
0.08 0.100–0.113 0.075–0.085 0.050–0.056 23 19
0.07 0.087–0.099 0.066–0.074 0.044–0.049 22 18
0.06 0.074–0.086 0.055–0.065 0.037–0.043 22 18
0.05 0.061–0.073 0.046–0.054 0.031–0.036 21 17
0.04 0.047–0.060 0.035–0.045 0.024–0.030 20 16
0.03 0.034–0.046 0.026–0.034 0.017–0.023 19 16
0.02 0.020–0.033 0.015–0.025 0.010–0.016 17 14
0.01 and 0.019 and 0.014 and 0.009 and 15 12
less less less less

X4.2 Tabulated in Table X4.2 are the minimum elongation values

in SI units, calculated using the equation given in Table
2.
TABLE X4.2 Elongation Values
Specified Wall Thickness, mm Elongation in 50 mm, min, %

Tension Test Specimen Specified Minimum Tensile Strength, MPa

Area, A, mm2
19-mm 25-mm 38-mm
Specimen Specimen Specimen 330 415
500 and 26.3 and 20.0 and 13.2 and 36 30
greater greater greater greater
480-499 25.3-26.2 19.2-19.9 12.7-13.1 36 30
460-479 24.2-25.2 18.4-19.1 12.1-12.6 36 29
440-459 23.2-24.1 17.6-18.3 11.6-12.0 36 29
420-439 22.1-23.1 16.8-17.5 11.1-11.5 35 29
400-419 21.1-22.0 16.0-16.7 10.6-11.0 35 29
380-399 20.0-21.0 15.2-15.9 10.0-10.5 35 28
360-379 19.0-19.9 14.4-15.0 9.5-9.9 34 28
340-359 17.9-18.9 13.6-14.3 9.0-9.4 34 28
320-339 16.9-17.8 12.8-13.5 8.5-8.9 34 27
300-319 15.8-16.8 12.0-12.7 7.9-8.4 33 27
280-299 14.8-15.7 11.2-11.9 7.4-7.8 33 27

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 A53/A53M − 12

260-279 13.7-14.7 10.4-11.1 6.9-7.3 32 26

240-259 12.7-13.6 9.6-10.3 6.4-6.8 32 26
220-239 11.6-12.6 8.8-9.5 5.8-6.3 31 26
200-219 10.5-11.5 8.0-8.7 5.3-5.7 31 25
190-199 10.0-10.4 7.6-7.9 5.0-5.2 30 25
180-189 9.5-9.9 7.2-7.5 4.8-4.9 30 24
170-179 9.0-9.4 6.8-7.1 4.5-4.7 30 24
160-169 8.4-8.9 6.4-6.7 4.2-4.4 29 24
150-159 7.9-8.3 6.0-6.3 4.0-4.1 29 24
140-149 7.4-7.8 5.6-5.9 3.7-3.9 29 23
130-139 6.9-7.3 5.2-5.5 3.5-3.6 28 23
120-129 6.3-6.8 4.8-5.1 3.2-3.4 28 23
110-119 5.8-6.2 4.4-4.7 2.9-3.1 27 22
100-109 5.3-5.7 4.0-4.3 2.7-2.8 27 22
90-99 4.8-5.2 3.6-3.9 2.4-2.6 26 21
80-89 4.2-4.7 3.2-3.5 2.1-2.3 26 21
70-79 3.7-4.1 2.8-3.1 1.9-2.0 25 21
60-69 3.2-3.6 2.4-2.7 1.6-1.8 24 20
50-59 2.7-3.1 2.0-2.3 ... 24 19
40-49 2.1-2.6 1.6-1.9 ... 23 19
30-39 1.6-2.0 ... ... 22 18
SUMMARY OF CHANGES

Committee A01 has identified the location of selected changes to this specification since the last issue,
A53/A53M–10, that may impact the use of this specification. (Approved March 1, 2012)

(1) Added new footnotes B and C to Table 1.

Committee A01 has identified the location of selected changes to this specification since the last issue,
A53/A53M–07, that may impact the use of this specification. (Approved October 1, 2010)

(1) Revised Table 1 to decrease maximum copper content for Type

E pipe from 0.50 to 0.40.
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