1、Designation:A403/A403M19Standard Specification forWrought Austenitic Stainless Steel Piping Fittings1This standard is issued under the fixed designation A403/A403M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revi
2、sion.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 U.S.Department of Defense.1.Scope*1.1 This specification covers wrought stainless s
3、teel fittingsfor pressure piping applications.21.2 Several grades of austenitic stainless steel alloys areincluded in this specification Grades are designated with aprefix,WP or CR,based on the applicable ASME or MSSdimensional and rating standards,respectively.1.3 For each of the WP stainless grade
4、s,several classes offittings are covered,to indicate whether seamless or weldedconstruction was utilized.Class designations are also utilizedto indicate the nondestructive test method and extent ofnondestructive examination(NDE).Table 1 is a generalsummary of the fitting classes applicable to all WP
5、 grades ofstainless steel covered by this specification.There are noclasses for the CR grades.Specific requirements are coveredelsewhere.1.4 This specification is expressed in both inch-pound unitsand in SI units.However,unless the order specifies theapplicable“M”specification designation(SI units),
6、the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used
7、 independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.1.6 This specification does not apply to cast steel fittings.Austenitic stainless steel castings are covered in SpecificationsA351/A351M,A743/A743M,and A744/A744M.1.7 This international st
8、andard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Ref
9、erenced Documents2.1 ASTM Standards:3A351/A351M Specification for Castings,Austenitic,forPressure-Containing PartsA743/A743M Specification for Castings,Iron-Chromium,Iron-Chromium-Nickel,Corrosion Resistant,for GeneralApplicationA744/A744M Specification for Castings,Iron-Chromium-Nickel,Corrosion Re
10、sistant,for Severe ServiceA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA960/A960M Specification for Common Requirements forWrought Steel Piping FittingsE112 Test Methods for Determining Average Grain SizeE165/E165M Practice for Liquid Penetrant Testing for Gen-
11、eral Industry2.2 ASME Standards:4ASME B16.9 Factory-Made Wrought Steel Butt-WeldingFittingsASME B16.11 Forged Steel Fittings,Socket-Welding andThreaded2.3 MSS Standards:5MSS SP-25 Standard Marking System for Valves,Fittings,Flanges,and UnionsMSS SP-43 Standard Practice for Light Weight StainlessStee
12、l Butt-Welding FittingsMSS SP-79 Socket-Welding Reducer Inserts1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for PipingApplications and Bolt
13、ingMaterials for Piping and Special Purpose Applications.Current edition approved March 1,2019.Published March 2019.Originallyapproved in 1956.Last previous edition approved in 2018 as A403/A403M 18a.DOI:10.1520/A0403_A0403M-19.2For ASME Boiler and Pressure Vessel Code applications see related Speci
14、fi-cation SA-403 in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Americ
15、an Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.5Available from Manufacturers Standardization Society of the Valve and FittingsIndustry(MSS),127 Park St.,NE,Vienna,VA 22180-4602,http:/www.mss-.*A Summary of Changes secti
16、on appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 MSS SP-83 Steel Pipe Unions,Socket-Wel
