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ASME/ANSI B16 Standards for Pipes and Fittings

The ASME B16 standards covers pipes and fittings in cast iron , cast
bronze, wrought copper and steel
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The ASME - American Society of Mechanical Engineers - ASME/ANSI B16 Standards covers
pipes and fittings in cast iron , cast bronze, wrought copper and steel.

ASME/ANSI B16.1 - 1998 - Cast Iron Pipe Flanges and Flanged Fittings
This Standard for Classes 25, 125, 250 Cast Iron Pipe Flanges and Flanged Fittings covers:

(a) pressure-temperature ratings,

 (b) sizes and method of designating openings of reducing fittings,

 (c) marking,
 (d) minimum requirements for materials,
 (e) dimensions and tolerances,
 (f) bolt, nut, and gasket dimensions and
 (g) tests.
ASME/ANSI B16.3 - 1998 - Malleable Iron Threaded Fittings
This Standard for threaded malleable iron fittings Classes 150, and 300 provides requirements
for the following:

 (a) pressure-temperature ratings

 (b) size and method of designating openings of reducing fittings
 (c) marking
 (d) materials
 (e) dimensions and tolerances
 (f) threading
 (g) coatings
ASME/ANSI B16.4 - 1998 - Cast Iron Threaded Fittings
This Standard for gray iron threaded fittings, Classes 125 and 250 covers:

 (a) pressure-temperature ratings

 (b) size and method of designating openings of reducing fittings
  (c) marking
 (d) material
 (e) dimensions and tolerances
 (f) threading, and
 (g) coatings
ASME/ANSI B16.5 - 1996 - Pipe Flanges and Flanged Fittings
The ASME B16.5 - 1996 Pipe Flanges and Flange Fittings standard covers pressure-
temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of
designating openings for pipe flanges and flanged fittings.

The standard includes flanges with rating class designations 150, 300, 400, 600, 900, 1500, and
2500 in sizes NPS 1/2 through NPS 24, with requirements given in both metric and U.S units.
The Standard is limited to flanges and flanged fittings made from cast or forged materials, and
blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also
included in this Standard are requirements and recommendations regarding flange
bolting, flange gaskets, and flange joints.

ASME/ANSI B16.9 - 2001 - Factory-Made Wrought Steel Butt-welding Fittings

This Standard covers overall dimensions, tolerances, ratings, testing, and markings for wrought
factory-made butt-welding fittings in sizes NPS 1/2 through 48 (DN 15 through 1200).

ASME/ANSI B16.10 - 2000 - Face-to-Face and End-to-End Dimensions of Valves

This Standard covers face-to-face and end-to-end dimensions of straightway valves, and
center-to face and center-to-end dimensions of angle valves. Its purpose is to assure installation
interchangeability for valves of a given material, type size, rating class, and end connection

ASME/ANSI B16.11 - 2001 - Forged Steel Fittings, Socket-Welding and Threaded

This Standard covers ratings, dimensions, tolerances, marking and material requirements for
forged fittings, both socket-welding and threaded.

ASME/ANSI B16.12 - 1998 - Cast Iron Threaded Drainage Fittings

This Standard for cast iron threaded drainage fittings covers:

 (a) size and method of designating openings in reducing fittings

 (b) marking
 (c) materials
 (d) dimensions and tolerances
 (e) threading
 (f) ribs
 (g) coatings
 (h) face bevel discharge nozzles, input shafts, base plates, and foundation bolt holes
(see Tables 1 and 2).
ASME/ANSI B16.14 - 1991 - Ferrous Pipe Plugs, Bushings and Lock-nuts with
Pipe Threads
This Standard for Ferrous Pipe Plugs, Bushings, and Lock-nuts with Pipe Threads covers:
  (a) pressure-temperature ratings:
 (b) size;
 (c) marking;
 (d) materials;
 (e) dimensions and tolerances;
 (f) threading; and
 (g) pattern taper.
ASME/ANSI B16.15 - 1985 (R1994) - Cast Bronze Threaded Fittings
This Standard pertains primarily to cast Class 125and Class 250 bronze threaded pipe fittings.
Certain requirements also pertain to wrought or cast plugs, bushings, couplings, and caps. This
Standard covers:

 (a) pressure-temperature ratings;

 (b) size and method of designating openings of reducing pipe fittings;
 (c) marking;
 (d) minimum requirements for casting quality and materials;
 (e) dimensions and tolerances in U.S. customary and metric (SI) units;
 (f) threading.
ASME/ANSI B16.18 - 1984 (R1994) - Cast Copper Alloy Solder Joint Pressure
Fittings
This Standard for cast copper alloy solder joint pressure fittings designed for use with copper
water tube, establishes requirements for:

 (a) Pressure-temperature ratings;

 (b) Abbreviations for end connections;
 (c) Sizes and method of designating openings of fittings;
 (d) Marking;
 (e) Material;
 (f) Dimensions and tolerances; and
 (g) Tests.
ASME/ANSI B16.20 - 1998 - Metallic Gaskets for Pipe Flanges-Ring-Joint, Spiral-
Would, and Jacketed
This standard covers materials, dimensions, tolerances, and markings for metal ring-joint
gaskets, spiral-wound metal gaskets, and metal jacketed gaskets and filler material. These
gaskets are dimensionally suitable for used with flanges described in the reference flange
standards ASME/ANSI B16.5, ASME B16.47, and API-6A. This standard covers spiral-wound
metal gaskets and metal jacketed gaskets for use with raised face and flat face flanges.
Replaces API-601 or API-601.

ASME/ANSI B16.21 - 1992 - Nonmetallic Flat Gaskets for Pipe Flanges

This Standard for nonmetallic flat gaskets for bolted flanged joints in piping includes:

 (a) types and sizes;

 (b) materials;
  (c) dimensions and allowable tolerances.
ASME/ANSI B16.22 - 1995 - Wrought Copper and Copper Alloy Solder Joint
Pressure Fittings
The Standard establishes specifications for wrought copper and wrought copper alloy, solder-
joint, seamless fittings, designed for use with seamless copper tube conforming to ASTM B 88
(water and general plumbing systems), B 280 (air conditioning and refrigeration service), and B
819 (medical gas systems), as well as fittings intended to be assembled with soldering materials
conforming to ASTM B 32, brazing materials conforming to AWS A5.8, or with tapered pipe
thread conforming to ASME B1.20.1. This Standard is allied with ASME B16.18, which covers
cast copper alloy pressure fittings. It provides requirements for fitting ends suitable for soldering.
This Standard covers:

 (a) pressure temperature ratings;

 (b) abbreviations for end connections;
 (c) size and method of designating openings of fittings;
 (d) marking;
 (e) material;
 (f) dimension and tolerances; and
 (g) tests.
ASME/ANSI B16.23 - 1992 - Cast Copper Alloy Solder Joint Drainage Fittings
(DWV)
The Standard establishes specifications for cast copper alloy solder joint drainage fittings,
designed for use in drain, waste, and vent (DWV) systems. These fittings are designed for use
with seamless copper tube conforming to ASTM B 306, Copper Drainage Tube (DWV), as well
as fittings intended to be assembled with soldering materials conforming to ASTM B 32, or
tapered pipe thread conforming to ASME B1.20.1. This standard is allied with ASME B16.29,
Wrought Copper and Wrought Copper Alloy Solder Joint Drainage Fittings - DWV. It provides
requirements for fitting ends suitable for soldering. This standard covers:

 (a) description;
 (b) pitch (slope);
 (c) abbreviations for end connections;
 (d) sizes and methods for designing openings for reducing fittings;
 (e) marking;
 (f) material; and
 (g) dimensions and tolerances.
ASME/ANSI B16.24 - 1991 (R1998) - Cast Copper Alloy Pipe Flanges and Flanged
Fittings
This Standard for Classes 25, 125, 250, and 800 Cast Iron Pipe Flanges and Flanged Fittings
covers:

 (a) pressure temperature ratings,

 (b) sizes and methods of designating openings for reduced fittings,
 (c) marking,
 (d) minimum requirements for materials,
  (e) dimensions and tolerances,
 (f) bolt, nut, and gasket dimensions, and
 (g) tests.
ASME/ANSI B16.25 - 1997 - Butt-welding Ends

 The Standard covers the preparation of butt welding ends of piping components to be
joined into a piping system by welding. It includes requirements for welding bevels, for
external and internal shaping of heavy-wall components, and for preparation of internal
ends (including dimensions and tolerances). Coverage includes preparation for joints
with the following.
 (a) no backing rings;
 (b) split or non continuous backing rings;
 (c) solid or continuous backing rings;
 (d) consumable insert rings;
 (e) gas tungsten are welding (GTAW) of the root pass. Details of preparation for any
backing ring must be specified in ordering the component.
ASME/ANSI B16.26 - 1988 - Cast Copper Alloy Fittings for Flared Copper Tubes
This standard for Cast Copper Alloy Fitting for Flared Copper Tubes covers:

 (a) pressure rating;

 (b) material;
 (c) size;
 (d) threading;
 (e) marking.
ASME/ANSI B16.28 - 1994 - Wrought Steel Butt-welding Short Radius Elbows and
Returns
This Standard covers ratings, overall dimensions, testing, tolerances, and markings for wrought
carbon and alloy steel butt-welding short radius elbows and returns. The term wrought denotes
fittings made of pipe, tubing, plate, or forgings.

ASME/ANSI B16.29 - 1994 - Wrought Copper and Wrought Copper Alloy Solder
Joint Drainage Fittings (DWV)
The standard for wrought copper and wrought copper alloy solder joint drainage fittings,
designed for use with copper drainage tube, covers:

 (a) Description,
 (b) Pitch (slope),
 (c) Abbreviations for End Connections,
 (d) Sizes and Method of Designating Openings for Reducing Fittings,
 (e) Marking,
 (f) Material,
 (g) Dimensions and Tolerances.
ASME/ANSI B16.33 - 1990 - Manually Operated Metallic Gas Valves for Use in Gas
Piping Systems Up to 125 psig
General This Standard covers requirements for manually operated metallic valves sizes NPS
1.2 through NPS 2, for outdoor installation as gas shut-off valves at the end of the gas service
line and before the gas regulator and meter where the designated gauge pressure of the gas
piping system does not exceed 125 psi (8.6 bar). The Standard applies to valves operated in a
temperature environment between .20 degrees F and 150 degrees F (.29 degrees C and 66
degrees C). Design This Standard sets forth the minimum capabilities, characteristics, and
properties, which a valve at the time of manufacture must possess, in order to be considered
suitable for use in gas piping systems.

ASME/ANSI B16.34 - 1996 - Valves - Flanged, Threaded, and Welding End

This standard applies to new valve construction and covers pressure-temperature ratings,
dimensions, tolerances, materials, nondestructive examination requirements, testing, and
marking for cast, forged, and fabricated flanged, threaded, and welding end, and wafer or
flange-less valves of steel, nickel-base alloys, and other alloys shown in Table 1. Wafer or
flange-less valves, bolted or through-bolt types, that are installed between flanges or against a
flange shall be treated as flanged end valves.

ASME/ANSI B16.36 - 1996 - Orifice Flanges

This Standard covers flanges (similar to those covered in ASME B16.5) that have orifice
pressure differential connections. Coverage is limited to the following:

 (a) welding neck flanges Classes 300, 400, 600, 900, 1500, and 2500
 (b) slip-on and threaded Class 300

 Orifice, Nozzle and Venturi Flow Rate Meters

ASME/ANSI B16.38 - 1985 (R1994) - Large Metallic Valves for Gas Distribution
The standard covers only manually operated metallic valves in nominal pipe sizes 2 1/2 through
12 having the inlet and outlet on a common center line, which are suitable for controlling the
flow of gas from open to fully closed, for use in distribution and service lines where the
maximum gage pressure at which such distribution piping systems may be operated in
accordance with the code of federal regulations (cfr), title 49, part 192, transportation of natural
and other gas by pipeline; minimum safety standard, does not exceed 125 psi (8.6 bar). Valve
seats, seals and stem packing may be nonmetallic.

ASME/ANSI B16.39 - 1986 (R1998) - Malleable Iron Threaded Pipe Unions

This Standard for threaded malleable iron unions, classes 150, 250, and 300, provides
requirements for the following:

 (a) design
 (b) pressure-temperature ratings
 (c) size
 (d) marking
 (e) materials
 (f) joints and seats
 (g) threads
 (h) hydrostatic strength
  (i) tensile strength
 (j) air pressure test
 (k) sampling
 (l) coatings
 (m) dimensions
ASME/ANSI B16.40 - 1985 (R1994) - Manually Operated Thermoplastic Gas
The Standard covers manually operated thermoplastic valves in nominal sizes 1.2 through 6 (as
shown in Table 5). These valves are suitable for use below ground in thermoplastic distribution
mains and service lines. The maximum pressure at which such distribution piping systems may
be operated is in accordance with the Code of Federal Regulation (CFR) Title 49, Part 192,
Transportation of Natural and Other Gas by Pipeline; Minimum Safety Standards, for
temperature ranges of .20 deg. F to 100 deg. F (.29 deg. C to 38 deg. C). This Standard sets
qualification requirements for each nominal valve size for each valve design as a necessary
condition for demonstrating conformance to this Standard. This Standard sets requirements for
newly manufactured valves for use in below ground piping systems for natural gas [includes
synthetic natural gas (SNG)], and liquefied petroleum (LP) gases (distributed as a vapor, with or
without the admixture of air) or mixtures thereof.

ASME/ANSI B16.42 - 1998 - Ductile Iron Pipe Flanges and Flanged Fittings,
Classes 150 and 300
The Standard covers minimum requirements for Class 150 and 300 cast ductile iron pipe
flanges and flanged fittings. The requirements covered are as follows:

 (a) pressure-temperature ratings

 (b) sizes and method of designating openings
 (c) marking
 (d) materials
 (e) dimensions and tolerances
 (f) blots, nuts, and gaskets
 (g) tests
ASME/ANSIB16.44 - 1995 - Manually Operated Metallic Gas Valves for Use in
House Piping Systems
This Standard applies to new valve construction and covers quarter turn manually operated
metallic valves in sizes NPS 1/2-2 which are intended for indoor installation as gas shutoff
valves when installed in indoor gas piping between a gas meter outlet & the inlet connection to a
gas appliance.

ASME/ANSI B16.45 - 1998 - Cast Iron Fittings for Solvent Drainage Systems
The Standard for cast iron drainage fittings used on self-aerating, one-pipe Solvent drainage
systems, covers the following:

 (a) description
 (b) sizes and methods for designating openings for reducing fittings
 (c) marking
 (d) material
  (e) pitch
 (f) design
 (g) dimensions and tolerances
 (h) tests
ASME/ANSI B16.47 - 1996 - Large Diameter Steel Flanges: NPS 26 through NPS 60
This Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking,
and testing for pipe flanges in sizes NPS 26 through NPS 60 and in ratings Classes 75,
150,0300, 400, 600, and 900. Flanges may be cast, forged, or plate (for blind flanges only)
materials. Requirements and recommendations regarding bolting and gaskets are also included.

ASME/ANSI B16.48 - 1997 - Steel Line Blanks

The Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking,
and testing for operating line blanks in sizes NPS 1/2 through NPS 24 for installation between
ASME B16. 5 flanges in the 150, 300, 600, 900, 1500, and 2500 pressure classes.

ASME/ANSI B16.49 - 2000 - Factory-Made Wrought Steel Butt-welding Induction

Bends for Transportation and Distribution Systems
This Standard covers design, material, manufacturing, testing, marking, and inspection
requirements for factory-made pipeline bends of carbon steel materials having controlled
chemistry and mechanical properties, produced by the induction bending process, with or
without tangents. This Standard covers induction bends for transportation and distribution piping
applications (e.g., ASME B31.4, B31.8, and B31.11) Process and power piping have differing
requirements and materials that may not be appropriate for the restrictions and examinations
described herein, and therefore are not included in this Standard.

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Related Topics

 Codes and Standards - Piping codes and standards - ASME, ANSI, ASTM, AGA, API,
AWWA, BS, ISO, DIN and more..
Related Documents

 ANSI - American National Standards Institute - ANSI provides a forum for

development of American national standards
 ANSI B16.5 - Steel Pipe Flanges - Maximum Pressure and Temperature Ratings -
Group 1.2 - Non-shock pressure (psig) and temperature ratings for steel pipe flanges
and flanged fittings
 ASME - American Society of Mechanical Engineers - ASME is one of the leading
organizations in the world developing codes and standards
 ASME - Performance Test Codes - The ASME Performance Test Codes provide
standard directions and rules for conducting and reporting tests
 ASME B31 - Pressure Piping - A survey of one of the most important pressure pipe
codes - ASME B31, earlier known as ANSI B31
 ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions -
Metric Units - Pipe sizes, inside and outside diameters, wall thickness, schedules,
weight and weight of pipe filled with water - Metric Units
  ASTM B306 - Copper Tubes for Drain, Waste and Vent - Dimensions and Working
Pressures - Dimensions of copper tubes ASTM B306 Drain Waste and Vent - DWV
 Bolt Stretching and Tensile Stress - Tensile stress and Hooke's Law
 Bronze Flanges - ASME/ANSI 150 lb - Flange diameters, thickness, bolt circles,
numbers and diameters of bolts for ASME/ANSI B16.15 - Cast Bronze Threaded
Fittings - 150 lb Bronze flanges with plain faces
 Carbon and Stainless Steel Flanges - ASME/ANSI Class 600 - ASME/ANSI B16.5-
1996 Pipe Flanges and Flanged Fittings - Class 600 Flanges - outside and inside
diameters, bolt circles, numbers and diameters of bolts
 Carbon and Stainless Steel Welding Neck Flange Bores - Flange bores of welding
neck flanges according ASME/ANSI B16.5-1996 Pipe Flanges and Flanged Fittings
 Cast Iron Flanged Pipe Fittings - Working Pressures - Maximum working pressures
for cast iron flanged pipe fittings according ANSI B16.1
 Cast Iron Flanges - ASME/ANSI Class 125 - ASME/ANSI B16.1 Cast Iron Pipe
Flanges and Flanged Fittings - Class 125 Flanges - outside and inside diameters, bolt
circles, numbers and diameters of bolts
 Cast Iron Flanges - ASME/ANSI Class 25 - ASME/ANSI B16.1 - 1998 - Cast Iron Pipe
Flanges and Flanged Fittings - Class 25 Flanges - outside and inside diameters, bolt
circles, numbers and diameters of bolts
 Cast Iron Flanges - ASME/ANSI Class 250 - ASME/ANSI B16.1 Cast Iron Pipe
Flanges and Flanged Fittings - Class 250 Flanges - outside and inside diameters, bolt
circles, numbers and diameters of bolts
 Cast Iron Threaded Pipe Fittings - Working Pressures - Maximum working pressures
for cast iron threaded pipe fittings according ANSI B16.4
 Comparing American and British Piping Standards - Comparing US American
(ASTM) and British (BSi) piping standards - specifications, grades and material
descriptions
 Dimensions Butt-Welding Fittings - Butt-Welding Fittings - B16.9 - dimensions
 Gaskets - Temperature Ratings - Temperature ratings for gaskets materials
 Malleable Iron Threaded Fittings - Pressure and Temperature Ratings - ASME/ANSI
B16.3 - 1998 - Malleable Iron Threaded Fittings - Pressure and Temperature Ratings
 Pipe Flanges and Gasket Dimensions - Gasket dimensions according ASME B16.5
Pipe Flanges and Flange Fittings
 Solder Joints - Pressure Ratings - Solder joints and their pressure ratings according
ASME B16.18
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