ASTM A403/A403M-07
(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 – 07
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 351/A 351M Specification for Castings, Austenitic, for
1.2 Several grades of austenitic stainless steel alloys are Pressure-Containing Parts
included in this specification Grades are designated with a A 370 Test Methods and Definitions for MechanicalTesting
prefix, WP or CR, based on the applicable ASME or MSS of Steel Products
dimensional and rating standards, respectively. A 480/A 480M Specification for General Requirements for
1.3 For each of the WP stainless grades, several classes of Flat-Rolled Stainless and Heat-Resisting Steel Plate,
fittings are covered, to indicate whether seamless or welded Sheet, and Strip
construction was utilized. Class designations are also utilized A 743/A 743M Specification for Castings, Iron-Chromium,
to indicate the nondestructive test method and extent of Iron-Chromium-Nickel, Corrosion Resistant, for General
nondestructive examination (NDE). Table 1 is a general Application
summary of the fitting classes applicable to all WP grades of A 744/A 744M Specification for Castings, Iron-Chromium-
stainless steel covered by this specification. There are no Nickel, Corrosion Resistant, for Severe Service
classes for the CR grades. Specific requirements are covered A 751 Test Methods, Practices, and Terminology for
elsewhere. Chemical Analysis of Steel Products
1.4 This specification is expressed in both inch-pound units A 960/A 960M Specification for Common Requirements
and in SI units. However, unless the order specifies the for Wrought Steel Piping Fittings
applicable “M” specification designation (SI units), the mate- E112 Test Methods for Determining Average Grain Size
rial shall be furnished to inch-pound units. E 165 Test Method for Liquid Penetrant Examination
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1.5 The values stated in either inch-pound units or SI units 2.2 ASME Standards:
are to be regarded separately as standard. Within the text, the ASME B16.9 Factory-Made Wrought Steel Butt-Welding
SI units are shown in brackets. The values stated in each Fittings
system are not exact equivalents; therefore, each system must ASME B16.11 Forged Steel Fittings, Socket-Welding and
be used independently of the other. Combining values from the Threaded
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two systems may result in nonconformance with the specifi- 2.3 MSS Standards:
cation. MSS SP-25 Standard Marking System for Valves, Fittings,
1.6 This specification does not apply to cast steel fittings. Flanges, and Unions
Austenitic stainless steel castings are covered in Specifications MSS SP-43 Standard Practice for Light Weight Stainless
A 351/A 351M, A 743/A 743M, and A 744/A 744M. Steel Butt-Welding Fittings
MSS SP-79 Socket-Welding Reducer Inserts
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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
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee the ASTM website.
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A01.22 on SteelForgingsandWroughtFittingsforPipingApplicationsandBolting Available from American Society of Mechanical Engineers (ASME), ASME
Materials for Piping and Special Purpose Applications. International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
Current edition approved April 1, 2007. Published May 2007. Originally www.asme.org.
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approved in 1956. Last previous edition approved in 2006 as A 403/A 403M-06. AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
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For ASME Boiler and Pressure Vessel Code applications see related Specifi- Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
cation SA-403 in Section II of that Code. hq.com.
*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 – 07
MSS SP-83 Steel Pipe Unions, Socket-Welding and 5. Manufacture
Threaded
5.1 Forming—Forging or shaping operations may be per-
...
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