1、Designation:A 403/A 403M 02An American National StandardStandard Specification forWrought Austenitic Stainless Steel Piping Fittings1This standard is issued under the fixed designationA 403/A 403M;the number immediately following the designation indicates the yearof original adoption or,in the case
2、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.Scope1.1 This specificati
3、on covers wrought stainless steel 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 e
4、ach of the WP stainless grades,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
5、 classes applicable to all WP 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”specifi
6、cation designation(SI units),the mate-rial shall be furnished to inch-pound units.1.5 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem are not exact equivalents;therefor
7、e,each system mustbe used independently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.6 This specification does not apply to cast steel fittings.Austenitic stainless steel castings are covered in SpecificationsA 351/A 351M,A 743/A 743M,and A
8、 744/A 744M.2.Referenced Documents2.1 ASTM Standards:A 262 Practices for Detecting Susceptibility to Intergranu-lar Attack in Austenitic Stainless Steels3A 351/A 351MSpecification for Castings,Austenitic,Austenitic-Ferritic(Duplex),for Pressure-ContainingParts4A 370 Test Methods and Definitions for
9、Mechanical Testingof Steel Products3A 388/A 388M Practice for Ultrasonic Examination ofHeavy Steel Forgings5A 480/A 480M Specification for General Requirements forFlat-Rolled Stainless and Heat-Resisting Steel Plate,Sheet,and Strip3A 743/A 743M Specification for Castings,Iron-Chromium,Iron-Chromium-
10、Nickel,Corrosion-Resistant,for GeneralApplication4A 744/A 744MSpecificationforCastings,Iron-Chromium-Nickel,Corrosion-Resistant,for Severe Ser-vice4A 751 Test Methods,Practices,and Terminology forChemical Analysis of Steel Products3A 960 SpecificationforCommonRequirementsforWrought Steel Piping Fitt
11、ings6E 112 Test Methods for Determining Average Grain Size7E 165 Test Method for Liquid Penetrant Examination8E 213 Practice for Ultrasonic Examination of Metal Pipeand Tubing72.2ASME Standards:ASME B16.9 Factory-Made Wrought Steel Butt-WeldingFittings91This specification is under the jurisdiction o
12、f 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 Piping Applications andBolting Materials for Piping and Special Purpose Applications.Current edition approved June 10 2002.Published June
13、 2002.Originallypublished as A 403 56 T.Last previous edition A 403/A 403M 01.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-403 in Section II of that Code.3Annual Book of ASTM Standards,Vol 01.03.4Annual Book of ASTM Standards,Vol 01.02.5Annual Book of ASTM Sta
14、ndards,Vol 01.05.6Annual Book of ASTM Standards,Vol 01.01.7Annual Book of ASTM Standards,Vol 03.01.8Annual Book of ASTM Standards,Vol 03.03.9Available from ASME International,Three Park Avenue,New York,NY10016-5990.TABLE 1 Fitting Classes for WP GradesClassConstructionNondestructive ExaminationSSeam
15、lessNoneWWeldedRadiography or UltrasonicWXWeldedRadiographyWUWeldedUltrasonic1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.ASME B16.11 Forged Steel Fittings,Socket-Welding andThreaded9ASME B16.28 Wrought Steel Butt-Welding Short RadiusE
16、lbows and Returns92.3MSS Standards:MSS SP-25 Standard Marking System for Valves,Fittings,Flanges,and Unions10MSS SP-43 Standard Practice for Light Weight StainlessSteel Butt-Welding Fittings10MSS SP-79 Socket-Welding Reducer Inserts10MSS SP-95 Swaged(d)Nipples and Bull Plugs102.4ASME Boiler and Pressure Vessel Code:Section VIII Division I,Pressure Vessels11Section IX,Welding Qualifications112.5AWS Standards:A 5.4 Specification for Corrosion-Resisting Chromium andChromium-Nickel Steel Covered Wel
