NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.

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Designation: D3350 − 21

Standard Specification for

Polyethylene Plastics Pipe and Fittings Materials1
This standard is issued under the fixed designation D3350; 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.

1. Scope* responsibility of the user of this standard to establish appro-

1.1 This specification covers the identification of polyeth- priate safety, health, and environmental practices and deter-
ylene plastic pipe and fittings materials in accordance with a mine the applicability of regulatory limitations prior to use.
cell classification system. It is not the function of this specifi- NOTE 4—There is no known ISO equivalent to this standard.
cation to provide specific engineering data for design purposes, 1.5 For information regarding molding and extrusion mate-
to specify manufacturing tolerances, or to determine suitability rials see Specification D4976. For information regarding wire
for use for a specific application. and cable materials see Specification D1248.
1.1.1 Some plastic pipe and fitting PE compounds classified
by this standard are sold as a base material and then combined 1.6 This international standard was developed in accor-
with other material(s) (for example, color or additive concen- dance with internationally recognized principles on standard-
trate) by the pipe or fitting manufacturer into a final classified ization established in the Decision on Principles for the
compound either prior to or during production of the final Development of International Standards, Guides and Recom-
article. This standard, excluding the requirements of Table 1, mendations issued by the World Trade Organization Technical
properties 5 and 6, and 6.1.1, can be used for property Barriers to Trade (TBT) Committee.
verification of the incoming base material(s) in accordance 2. Referenced Documents
with 8.1.
1.1.2 In the case of PE compounds sold as the compound 2.1 ASTM Standards:2
classified by the standard, see 8.1 regarding property verifica- D618 Practice for Conditioning Plastics for Testing
tion of the incoming classified compound. D638 Test Method for Tensile Properties of Plastics
1.1.3 Compounds with a cell classification value other than D746 Test Method for Brittleness Temperature of Plastics
‘0’ for the Hydrostatic Strength Classification (property 6) rely and Elastomers by Impact
on a defined formulation. The composition of the defined D790 Test Methods for Flexural Properties of Unreinforced
formulation can be obtained from the owner of the formulation. and Reinforced Plastics and Electrical Insulating Materi-
als
NOTE 1—Deviations from the defined formulation may affect the D792 Test Methods for Density and Specific Gravity (Rela-
Hydrostatic Strength Classification.
tive Density) of Plastics by Displacement
1.2 Polyethylene plastic materials, being thermoplastic, are D883 Terminology Relating to Plastics
reprocessable and recyclable (Note 3). This specification al- D1238 Test Method for Melt Flow Rates of Thermoplastics
lows for the use of those polyethylene materials, provided that by Extrusion Plastometer
all specific requirements of this specification are met. D1248 Specification for Polyethylene Plastics Extrusion
NOTE 2—The notes in this specification are for information only and Materials for Wire and Cable
shall not be considered part of this specification. D1505 Test Method for Density of Plastics by the Density-
NOTE 3—See Guide D5033 for information and definitions related to Gradient Technique
recycled plastics. D1603 Test Method for Carbon Black Content in Olefin
1.3 The values stated in SI units are to be regarded as Plastics
standard. D1693 Test Method for Environmental Stress-Cracking of
1.4 This standard does not purport to address all of the Ethylene Plastics
safety concerns, if any, associated with its use. It is the D1898 Practice for Sampling of Plastics (Withdrawn 1998)3

1 2
This specification is under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved July 1, 2021. Published July 2021. Originally approved the ASTM website.
3
in 1974. Last previous edition approved in 2014 as D3350 – 14. DOI: 10.1520/ The last approved version of this historical standard is referenced on
D3350-21. www.astm.org.

*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

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 D3350 − 21
TABLE 1 Primary PropertiesA —Cell Classification Limits
Test
Property 0 1 2 3 4 5 6 7 8
Method
3
1. Density, g/cm D1505 Unspecified 0.925 or >0.925- >0.940- >0.947- >0.955 ... Specify
lower 0.940 0.947 0.955 Value

2. Melt index D1238 Unspecified >1.0 1.0 to <0.4 to <0.15B C

Specify
0.4 0.15 Value

3. Flexural D790 Unspecified <138 138- 276- 552- 758- >1103 Specify
modulus, MPa (psi) (<20 000) <276 <552 <758 <1103 (>160 000) Value
(20 000 to (40 000 to (80 000 to (110 000 to
<40 000) 80 000) 110 000) <160 000)

4. Tensile strength D638 Unspecified <15 15-<18 18-<21 21-<24 24-<28 >28 Specify
at yield, MPa (psi) (<2200) (2200- (2600- (3000- (3500- (>4000) Value
<2600) <3000) <3500) <4000)

5. Slow Crack
Growth Resistance
I. ESCR D1693 Unspecified
a. Test condition A B C C ... ... ... Specify
(100% Igepal.)D Value
b. Test duration, h 48 24 192 600
c. Failure, max, % Unspecified 50 50 20 20
II. PENT (hours) F1473
Molded plaque, Unspecified ... ... ... 10 30 100 500 Specify
80°C, 2.4 MPa Value
Notch depth, Unspecified
F1473, Table 1

6. Hydrostatic Strength
Classification
I. Hydrostatic design D2837 NPRE 5.52 6.89 8.62 11.03 ... ...
basis, MPa (psi), (23°C) (800) (1000) (1250) (1600)
II. Minimum required ISO 12162 ... ... ... ... ... 8 10
strength, MPa (psi), (20°C) (1160) (1450)
A
Compliance with physical properties in accordance with Section 8 is required including requirements for cell classification, color, and ultraviolet (UV) stabilizer, thermal
stability, brittleness temperature, density, tensile strength at yield, and elongation at break.
B
Refer to 10.1.4.1.
C
Refer to 10.1.4.2.
D
There are environmental concerns regarding the disposal of Nonylphenoxy poly(ethyleneoxy) ethanol (CAS 68412-54-4) for example, Igepal CO-630. Users are advised
to consult their supplier or local environmental office and follow the guidelines provided for the proper disposal of this chemical.
E
NPR = Not Pressure Rated.

D2837 Test Method for Obtaining Hydrostatic Design Basis F2263 Test Method for Evaluating the Oxidative Resistance
for Thermoplastic Pipe Materials or Pressure Design Basis of Polyethylene (PE) Pipe to Chlorinated Water
for Thermoplastic Pipe Products 2.2 ISO Standard:
D2839 Practice for Use of a Melt Index Strand for Deter- ISO 12162 Thermoplastic Materials for Pipes and Fittings
mining Density of Polyethylene for Pressure Applications—Classification and
D3035 Specification for Polyethylene (PE) Plastic Pipe (DR- Designation—Overall Service (Design) Coefficient
PR) Based on Controlled Outside Diameter
D3892 Practice for Packaging/Packing of Plastics 3. Terminology
D4218 Test Method for Determination of Carbon Black 3.1 Definitions:
Content in Polyethylene Compounds by the Muffle- 3.1.1 Terms as described in Terminology D883 shall apply
Furnace Technique in this specification.
D4703 Practice for Compression Molding Thermoplastic 3.1.2 polyethylene plastics, n—as defined by this
Materials into Test Specimens, Plaques, or Sheets specification, plastics or resins prepared by the polymerization
D4883 Test Method for Density of Polyethylene by the of no less than 85 % ethylene and no less than 95 % of total
Ultrasound Technique olefins with additional compounding ingredients.
D4976 Specification for Polyethylene Plastics Molding and
Extrusion Materials 3.2 Definitions of Terms Specific to This Standard:
D5033 Guide for Development of ASTM Standards Relating 3.2.1 base materials, n—PE material without non-black or
to Recycling and Use of Recycled Plastics (Withdrawn black pigment, supplied to industry, that is either a PE
2007)3 compound classified by this Standard or a component of a PE
F1473 Test Method for Notch Tensile Test to Measure the compound classified by this standard.
Resistance to Slow Crack Growth of Polyethylene Pipes 3.2.2 PE compounds, n—has the same meaning as PE
and Resins plastics materials, compounds, and plastics.

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 D3350 − 21
3.3 Historical usage and user group conventions have re- characterization, and specification of material properties. The
sulted in inconsistent terminology used to categorize and information from the format is to be used alone or in
describe polyethylene resins and compounds. The following combination.
terminology is in use in ASTM specifications pertaining to NOTE 7—This type format, however, is subject to possible misapplica-
polyethylene: tion since unobtainable property combinations can be selected if the user
is not familiar with commercially available materials. The manufacturer
3.3.1 Specification D1248: should be consulted. Additionally, the appropriate ASTM standard speci-
3.3.1.1 Type (0, I, II, III, IV) = density ranges (same, fication should be reviewed to assure materials utilized will meet all the
respectively, as Class in Specification D4976). material and piping requirements as specified in the standard.
3.3.1.2 Class (A, B, C, D) = composition and use. 4.3 Grade—A code for polyethylene pipe and fittings ma-
3.3.1.3 Category (1, 2, 3, 4, 5) = melt index ranges (same as terials that consists of the two letter abbreviation for polyeth-
Grade in Specification D4976). ylene (PE) followed by two numbers that designate the density
3.3.1.4 Grade (E, J, D, or W followed by one or two digits) cell (Property 1) and the slow crack growth resistance cell
= specific requirements from tables. (Property 5), as defined by either Test Method F1473 or Test
3.3.2 Specification D3350: Method D1693, of the thermoplastic, as specified in Table 1.
3.3.2.1 Type (I, II, III) = density ranges (same as Types I, II, For the requirements of Property 5 (slow crack growth
and III in Specification D1248 and Classes 1, 2, and 3 in resistance), consult the materials section of the appropriate
Specification D4976). ASTM standard specification for the end-use application.
3.3.2.2 Class = a line callout system consisting of “PE” NOTE 8—Grade designations were adapted from Specification
D1248 – 84 prior to the removal of pipe material from D1248 - 84.
followed by six cell numbers from Table 1 plus a letter (A, B, Former Specification D1248 – 84 grades for PE pipe materials were P14,
C, D, E) denoting color and UV stabilizer. P23, P24, P33, and P34. Equivalent Specification D3350 grade designa-
3.3.2.3 Grade = simplified line callout system using “PE” tions for these materials are PE11, PE20, PE23, PE30, and PE33,
followed by density and slow crack growth cell numbers from respectively.
Table 1. 5. Materials and Manufacture
3.3.3 Specification D4976:
5.1 The molding and extrusion material shall be polyethyl-
3.3.3.1 Group (1, 2) = branched or linear polyethylene. ene plastic in the form of powder, granules, or pellets.
3.3.3.2 Class (0, 1, 2, 3, 4) = density ranges (same,
respectively, as Type in Specification D1248). 5.2 The molding and extrusion materials shall be as uniform
3.3.3.3 Grade (1, 2, 3, 4, 5) = melt index ranges (same as in composition and size and as free of contamination as is
Category in Specification D1248). achieved by good manufacturing practice. If necessary, the
level of contamination may be agreed upon between the
4. Classification manufacturer and the purchaser.
5.3 When specified, the color and translucence of molded or
4.1 Polyethylene plastic pipe and fittings compounds are
extruded pieces formed, under the conditions specified by the
classified in accordance with density, melt index, flexural
manufacturer of the materials, shall be comparable within
modulus, tensile strength at yield, slow crack growth
commercial match tolerances to the color and translucence of
resistance, and hydrostatic strength classification in Table 1.
standard samples supplied in advance by the manufacturer of
NOTE 5—It has been a long-standing practice to use the following terms the material.
in describing polyethylene plastics:
Type I (0.910 to 0.925) = Low Density
6. Physical Properties
Type II (0.926 to 0.940) = Medium Density 6.1 Cell Classification—Test values for specimens of the PE
Type III (0.941 to 0.965) = High Density
material prepared as specified in Section 9 and tested in
NOTE 6—The manner in which materials are identified in the cell accordance with Section 10 shall conform to the requirements
classification is illustrated for Class PE233424B as follows (refer also to given in Table 1. A typical property value for a PE material is
Table 1 and 6.2):
to be the average value from testing numerous lots or batches
Class
2 3 3 4 2 4 B
and determines the cell number. When, due to manufacturing
Density (0.926–0.940 g/cm ) 3 tolerances and testing bias, individual lot or batch values fall
Melt Index (<0.4–0.15) into the adjoining cell, the individual value shall not be
Flexural Modulus (276–<552 MPa)
Tensile Strength at yield considered acceptable unless the user, or both the user and the
(21–<24 MPa (3000–<3500 psi)) producer, determine that the individual lot or batch is suitable
Slow Crack Growth Resistance for its intended purpose.
I. ESCR D1693
Condition B, 24 h, 50% max failure 6.1.1 For PE compounds with a code letter designation of A,
II. PENT F1473 all properties shall be determined, for classification purposes,
Average 1 h failure on the non-pigmented (natural) material. For PE compounds
Hydrostatic design basis at 23°C
(11.03 MPa (1600 psi)) with any other code letter designation, all properties other than
Color and UV stabilizer (colored) density, in accordance with 6.5, shall, for classification
purposes, be determined on the PE compound represented by
4.2 Materials used in polyethylene plastic pipe and fittings that code letter (for example, black [C], colored with UV
shall use a cell-type format for the identification, close stabilizer [E], etc.)

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 D3350 − 21
6.2 Color and Ultraviolet (UV) Stabilizer—The color and TABLE 2 Minimum Log Average Test Times for Oxidative
UV stabilization shall be indicated at the end of the cell Resistance Classification
classification by means of a letter designation in accordance 90°C (194°F) Test Temperature
Test Stress 2.48 Test Stress 2.76 Test Stress 3.10
with the following code: Categorization
MPa (360 psi) MPa (400 psi) MPa (450 psi)
Code Letter Color and UV Stabilizer Time (h) Time (h) Time (h)
A Natural CC0 Unspecified Unspecified Unspecified
B Colored CC1 2700 1900 1200
C Black with a carbon black in CC2 7400 5100 3400
the range as noted in 6.2.1 and 6.2.2 CC3 16 200 11 100 7400
D Natural with UV stabilizer
E Colored with UV stabilizer

6.2.1 For PE compounds with a hydrostatic strength classi-

fication cell class 0 (not pressure-rated), the carbon black class specified in 3.3.2.2, the user shall specify an oxidative
content shall be in the range of 2.0 % to 4.0 %. resistance requirement by appending the category designation
requirement (Table 2) to the line call out.
6.2.2 For PE compounds with a hydrostatic strength classi-
6.8.2 The oxidative resistance time used to classify the PE
fication other than cell class 0, the carbon black content shall
compound shall be determined in accordance with 10.1.11 and
be in the range of 2.0 % to 3.0 %.
be classified in accordance with Table 2.
6.3 Thermal Stability—The PE material shall contain suffi-
cient antioxidant so that the minimum induction temperature 7. Sampling
shall be 220°C when tested in accordance with 10.1.9. 7.1 A batch or lot shall be considered as a unit of manufac-
6.4 Brittleness Temperature—The brittleness temperature ture and shall consist of one production run or as a blend of two
shall not be warmer than −60°C when tested in accordance or more production runs of material.
with Test Method D746. 7.2 Unless otherwise agreed upon between the manufacturer
6.5 Density—The density used to classify the material shall and the purchaser, the material shall be sampled in accordance
be the density of the PE base material (non-pigmented PE) with the procedure described in Sections 9 through 12 of
determined in accordance with 10.1.3. When the average Practice D1898. Adequate statistical sampling prior to packag-
density of any lot or shipment falls within 60.002 g/cm3 of the ing shall be considered an acceptable alternative.
nominal value, it shall be considered as conforming to the NOTE 9—A sample taken from finished product may not necessarily
nominal value and to all classifications based on the nominal represent the original batch or lot.
value.
6.5.1 For black compounds, containing carbon black, deter- 8. Number of Tests
mine the density, Dp, and calculate the resin density, Dr, as 8.1 The requirements identified by the material designation
follows: and otherwise specified in the purchase order shall be verified
Dr 5 Dp 2 0.0044C by tests made in accordance with 11.1. For routine inspection,
only those tests necessary to identify the material to the
where: satisfaction of the purchaser shall be required. One sample
C = weight percent of carbon black. shall be sufficient for testing each batch or lot provided that the
6.5.2 For colored compounds, the nominal density of the average values for all of the tests made on that batch or lot
base material shall be provided by the manufacturer, on comply with the specified requirements.
request. 9. Specimen Preparation
6.6 Tensile Strength at Yield—The tensile strength at yield 9.1 Unless otherwise specified in Section 10, the test speci-
used to classify the material shall be the tensile strength at yield mens shall be molded in accordance with Procedure C of
of the PE resin determined in accordance with 10.1.6. When Annex A1 of Practice D4703.
the average tensile strength at yield of any lot or shipment falls
within 63.45 MPa (6500 psi) of the nominal value, it shall be 9.2 When pipe or fitting test specimens are required, they
considered as conforming to the nominal value and to all shall be extruded or molded in accordance with the specifica-
classifications based on the nominal value. tions of the material manufacturer.
6.7 Elongation at Break—As tested in accordance with 10. Test Methods
10.1.6, all pressure rated materials shall have a minimum
10.1 The properties enumerated in this specification shall be
extension at break of 400 %.
determined in accordance with the following test methods:
6.8 Oxidative Resistance Classification: 10.1.1 Conditioning—Unless otherwise specified in the test
6.8.1 The Oxidative Resistance Classification is a classifi- methods or in this specification, for those tests where condi-
cation of a PE compound’s resistance to the oxidative effects of tioning is required, condition the molded test specimens in
chlorinated potable water. The classification is only for PE accordance with Procedure A of Practice D618.
compounds intended for potable water pressure piping appli- 10.1.2 Test Conditions—Unless otherwise specified in the
cations as noted in the materials requirement section of the test methods or in this specification, conduct tests at the
appropriate ASTM standard specification. In addition to the standard laboratory temperature of 23 6 2°C (73.4 6 3.6°F).

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 D3350 − 21
10.1.3 Density—Test Method D1505 or alternative methods mm/min (20 in./min for materials in the density range from
referenced in 2.1 (see D792, D2839, and D4883) providing 0.910 to 0.925 g/cm3) and 50 mm/min (2 in./min for all others).
equivalent accuracy. Make duplicate determinations using two Specimens shall conform to the dimensions given for Type IV
separate portions of the same molding or from two moldings. in Test Method D638 with a thickness of 1.9 6 0.2 mm
The molded specimen thickness portions shall be 1.9 6 0.2 (0.075 6 0.008 in.). Specimen shall be either die cut or
mm (0.075 6 0.008 in.). Calculate the average value. machined.
10.1.4 Melt Index—Test Method D1238, using Condition 10.1.7 Slow Crack Growth Resistance—One method shall
190/2.16. Make duplicate determinations on the material in the be used to classify this material property.
form of powder, granules, or pellets, and calculate the average; 10.1.7.1 Slow Crack Growth Resistance—The material’s
no conditioning is required. resistance shall meet the minimum requirement shown for the
10.1.4.1 For materials having a melt index less than 0.15 appropriate cell classification when tested in accordance with
(Cell 4), the manufacturer shall report a flow rate not greater Test Method D1693.
than 20 g/10 min and not less than 4.0 g/10 min when tested in 10.1.7.2 Slow Crack Growth Resistance—The average fail-
accordance with Test Method D1238, Condition 190/21.6. ure time from two test specimens shall meet the minimum
10.1.4.2 Classify materials having a melt index less than requirement shown for the appropriate cell classification when
0.15 (Cell 4) as Cell 5 only if they have a flow rate not greater tested in accordance with Test Method F1473. Test at least four
than 4.0 g/10 min when tested in accordance with Test Method specimens in case of a dispute.
D1238, Condition 190/21.6. 10.1.8 Hydrostatic Strength Classification—One method
shall be used to classify this material property.
NOTE 10—For materials having a melt index less than 0.40 to 0.15 g/10 10.1.8.1 Hydrostatic Design Basis—Determine the hydro-
min (Cell 3), the manufacturer may report a flow rate value when tested
in accordance with Test Method D1238, Condition 190/21.6. For non- static design basis in accordance with Test Method D2837, on
pressure applications, if agreed upon between the manufacturer and the pipe extruded from three different lots of material. Subject
purchaser, the manufacturer may report only the melt index. specimens from one lot for at least 10 000 h. Terminate the
NOTE 11—Flow rate is the general term used for all results obtained tests on the two additional lots after 2000 h. The results from
with Test Method D1238. Although the flow rate of polyethylene plastics each of the three lots shall be within the same or next higher
may be measured under any of the conditions listed for it under 7.2 of Test
Method D1238, only measurements made at Condition 190/2.16 may be cell limits.
identified as “Melt Index.” NOTE 12—For pressure application at elevated temperatures, the
10.1.5 Flexural Modulus—Test Methods D790, using hydrostatic design basis should be determined at that temperature in
Method 1, Procedure B, and a 50-mm (2-in.) test span. Test five accordance with Test Method D2837. The 100 000-h intercept should be
categorized in accordance with Table 1 of Test Method D2837.
specimens, each 3.2 by 12.7 mm (1⁄8 by 1⁄2 in.) flatwise at a
crosshead speed of 12.7 mm/min (0.5 in./min) and the average 10.1.8.2 Minimum Required Strength—Determine the mini-
value of the secant modulus calculated at 2 % strain in the mum required strength in accordance with ISO 12162.
outer fibers. 10.1.9 Thermal Stability—Test specimens taken from pipe
10.1.5.1 The deflection of the test specimen corresponding or fittings made from the virgin material with a differential
to 2 % strain (0.02 mm/mm or in./in.) is calculated as follows: scanning calorimeter (DSC).4 The directions of the instrument
manufacturer regarding calibration and operation shall be
D 5 rL2 /6d followed except when in conflict with other parts of this
where: section.
D = deflection of the center of the beam test specimen at 2 % NOTE 13—This test requires accurate temperature and atmosphere
strain, in., control on the DSC specimen compartment. The DSC manufacturers offer
r = strain in the outer fibers = 0.02 mm/mm (0.02 in./in.), choices in cell configuration and temperature control parameters that may
L = test span = 50 mm (2 in.), and affect this required control. For example, in some power compensation
DSCs, use of the two-hole platinum specimen holder lids with a special
d = specimen depth = 3.2 mm (1⁄8 in.).
“flow-through” swing-away block cover is required. Therefore, the user
10.1.5.2 The stress corresponding to 2 % strain is calculated may wish to consult equipment-specific literature and with the equipment
as follows: manufacturer to optimize the operation of individual DSCs for this test.

S 5 3 PL/2 bd2
10.1.9.1 Specimens—Press small pieces of the pipe into
films 0.127 6 0.013 mm (0.0050 6 0.0005 in.) thick. Cut at
where: least three disks 6.35 6 0.13 mm (0.250 6 0.005 in.) in
S = stress in the outer fiber at 2 % strain, diameter from the film.
P = load corresponding to 2 % strain, N (lbf), 10.1.9.2 Procedure—Place the disk of film in a small
L = test span = 50 mm (2 in.), aluminum cup used in the DSC in a stretched condition, as
d = specimen depth = 3.2 mm (1⁄8 in.), and shown in Fig. 1(a). Place a small piece of indium (melting
b = specimen width = 12.7 mm (1⁄2 in.). point 156.6°C) or anisic acid (melting point 183.0°C) for a
The secant modulus at 2 % strain is the ratio of stress to temperature reference standard contained in a similar cup (see
strain or S/0.02. Fig. 1(b)) in the reference position. Use an oxidized copper
10.1.6 Tensile Strength at Yield—The tensile strength at
yield and elongation at break shall be determined in accordance
with Test Method D638. The speed of testing shall be 500 4
Instruments are available from TA Instruments, Perkin-Elmer, and others.

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 D3350 − 21

FIG. 1 Mounting Film Specimen in Cup

reference disk for black, filled, or dark brown test specimens 10.1.10 Carbon Black Content—Test Method D1603 or Test
and an aluminum disk for natural or light pigmented polymers. Method D4218 shall be used. Make duplicate determinations
Place the specimen and reference standard cups in the instru- from a sample of the material in the form of powder, granules,
ment which is preset at approximately 150°C. The bottoms of or pellets.
the cups shall be pressed and rubbed securely against the flat 10.1.11 Oxidative Resistance Test—Test specimens shall
surface so as to ensure that thermal contact is made. Allow 5 consist of extruded 4-in. DR11 IPS pipe meeting the dimen-
min for the cups to reach thermal equilibrium. Begin the sional requirements of Specification D3035. All specimens
programmed heating at approximately 150°C at a heating rate shall be from the same lot of pipe. Test a minimum of five (5)
of 10.0°C/min in static air. Test at least three film specimens specimens in accordance with Test Method F2263 at one of the
from each sample and use the average value for the induction temperature and stress combinations of Table 2.
temperature.
NOTE 15—If a selected temperature/stress condition results in prema-
NOTE 14—Since the indium standard may change with use, it should ture failures, testing may be conducted at a lower stress as shown in Table
not be used more than 30 times without confirming that no significant 2.
change in melting point has occurred. This check can be made by
comparison with a fresh piece of indium. 10.1.11.1 Calculation—Calculate the log average test time
10.1.9.3 Results—The temperature change (ΔT) or heat using all failures and non-failures. All specimens shall have
absorption rate (J/s) in the specimen plotted against tempera- been tested at the same nominal test stress. Data from not less
ture shall produce a line with a clear rise in slope. The than five specimens are required for compound classification.
induction temperature (degradation onset) is the intersection of 10.1.11.2 Significance—Testing is only required to be per-
the extended base line and a line tangent to the leading slope of formed on representative pipe samples for the original valida-
the exothermic decomposition peak (see Fig. 2). tion of a particular compound.

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FIG. 2 Typical DSC Plots

11. Inspection at the lowest rate to the point of delivery, unless otherwise
11.1 Inspection of the material shall be made as agreed upon specified in the contract or order.
between the purchaser and the manufacturer as part of the 13.2 Marking—Unless otherwise agreed upon between the
purchase contract. seller and the purchaser, shipping containers shall be marked
with the name of the material, identification in accordance with
12. Retest and Rejection
this specification, the lot or batch number and quantity con-
12.1 If any failure occurs, and when specified by the tained therein, as defined by the contract or order under which
manufacturer, the material shall be retested to establish con- shipment is made, and the name of the manufacturer.
formity in accordance with the agreement between the pur-
chaser and the manufacturer. 13.3 All packing, packaging, and marking provisions of
Practice D3892 shall apply to this specification.
13. Packaging and Marking
13.1 Packaging—The material shall be packaged in stan- 14. Keywords
dard commercial containers, so constructed as to ensure 14.1 cell classification system; pipe and fittings material;
acceptance by common or other carriers for safe transportation polyethylene; recycled

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 D3350 − 21
SUMMARY OF CHANGES

Committee D20 has identified the location of selected changes to this standard since the last issue
(D3350 – 14) that may impact the use of this standard. (July 1, 2021)

(1) Added 1.1.1, 1.1.2, and 1.1.3. (4) Added 6.1.1.

(2) Added Note 1 (all subsequent notes will be re-numbered). (5) Revised 6.5 and 6.5.2.
(3) Revised 3.2.1 (all subsequent terminology entries will be
re-numbered).

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