ASTM A403/A403M-04
(Specification)Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
SCOPE
1.1 This specification covers wrought stainless steel fittings for pressure piping applications.
1.2 Several grades of austenitic stainless steel alloys are included in this specification Grades are designated with a prefix, WP or CR, based on the applicable ASME or MSS dimensional and rating standards, respectively.
1.3 For each of the WP stainless grades, several classes of fittings are covered, to indicate whether seamless or welded construction was utilized. Class designations are also utilized to indicate the nondestructive test method and extent of nondestructive examination (NDE). Table 1 is a general summary of the fitting classes applicable to all WP grades of stainless steel covered by this specification. There are no classes for the CR grades. Specific requirements are covered elsewhere.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.6 This specification does not apply to cast steel fittings. Austenitic stainless steel castings are covered in Specifications A 351/A 351M, A 743/A 743M, and A 744/A 744M.
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Designation: A 403/A 403M – 04
Standard Specification for
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Wrought Austenitic Stainless Steel Piping Fittings
This standard is issued under the fixed designationA 403/A 403M; 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 (e) 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* 2. Referenced Documents
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1.1 This specification covers wrought stainless steel fittings 2.1 ASTM Standards:
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for pressure piping applications. A 262 Practices for Detecting Susceptibility to Intergranu-
1.2 Several grades of austenitic stainless steel alloys are lar Attack in Austenitic Stainless Steels
included in this specification Grades are designated with a A 351/A 351M Specification for Castings, Austenitic,
prefix, WP or CR, based on the applicable ASME or MSS Austenitic-Ferritic(Duplex),forPressure-ContainingParts
dimensional and rating standards, respectively. A 370 Test Methods and Definitions for MechanicalTesting
1.3 For each of the WP stainless grades, several classes of of Steel Products
fittings are covered, to indicate whether seamless or welded A 388/A 388M Practice for Ultrasonic Examination of
construction was utilized. Class designations are also utilized Heavy Steel Forgings
to indicate the nondestructive test method and extent of A 480/A 480M Specification for General Requirements for
nondestructive examination (NDE). Table 1 is a general Flat-Rolled Stainless and Heat-Resisting Steel Plate,
summary of the fitting classes applicable to all WP grades of Sheet, and Strip
stainless steel covered by this specification. There are no A 743/A 743M SpecificationforCastings,Iron-Chromium,
classes for the CR grades. Specific requirements are covered Iron-Chromium-Nickel, Corrosion-Resistant, for General
elsewhere. Application
1.4 This specification is expressed in both inch-pound units A 744/A 744M Specification for Castings, Iron-
and in SI units. However, unless the order specifies the Chromium-Nickel, Corrosion-Resistant, for Severe Ser-
applicable “M” specification designation (SI units), the mate- vice
rial shall be furnished to inch-pound units. A 751 Test Methods, Practices, and Terminology for
1.5 The values stated in either inch-pound units or SI units Chemical Analysis of Steel Products
are to be regarded separately as standard. Within the text, the A 960 Specification for Common Requirements for
SI units are shown in brackets. The values stated in each Wrought Steel Piping Fittings
system are not exact equivalents; therefore, each system must E 112 Test Methods for Determining Average Grain Size
be used independently of the other. Combining values from the E 165 Test Method for Liquid Penetrant Examination
two systems may result in nonconformance with the specifi- E 213 Practice for Ultrasonic Examination of Metal Pipe
cation. and Tubing
1.6 This specification does not apply to cast steel fittings. 2.2 ASME Standards:
Austenitic stainless steel castings are covered in Specifications ASME B16.9 Factory-Made Wrought Steel Butt-Welding
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A 351/A 351M, A 743/A 743M, and A 744/A 744M. Fittings
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
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A01.22 on SteelForgingsandWroughtFittingsforPipingApplicationsandBolting For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Materials for Piping and Special Purpose Applications. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2004. Published May 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1956. Last previous edition approved in 2003 as A 403/A 403M-03a. the ASTM website.
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For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from ASME International, Three Park Avenue, New York, NY
cation SA-403 in Section II of that Code. 10016-5990.
*ASummary 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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A 403/A 403M – 04
TABLE 1 Fitting Classes for WP Grades
4.2.2 Vacuum furnace, or
Class Construction Nondestructive Examination 4.2.3 One of the former followed by vacuum or electroslag-
consumable remelting.
S Seamless None
W Welded Radiography or Ultrasonic
4.3 If secondary melting is employed, the heat shall be
WX Welded Radiography
defined as all ingots remelted from a primary heat.
WU Welded Ultr
...
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