1、Designation:A790/A790M18Standard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelPipe1This standard is issued under the fixed designation A790/A790M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification2covers seamless and straight-seamwelded ferritic/austenitic steel pipe intended for general corro-sive
3、 service,with particular emphasis on resistance to stresscorrosion cracking.These steels are susceptible to embrittle-ment if used for prolonged periods at elevated temperatures.1.2 Optional supplementary requirements are provided forpipe when a greater degree of testing is desired.Thesesupplementar
4、y requirements call for additional tests to be madeand,when desired,one or more of these may be specified in theorder.1.3 Appendix X1 of this specification lists the dimensions ofwelded and seamless stainless steel pipe as shown in ANSIB36.19.Pipe having other dimensions may be furnishedprovided suc
5、h pipe complies with all other requirements of thisspecification.1.4 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 systems
6、hall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.The inch-pound units shall apply unless the Mdesignation of this specification is specified in the order.NOTE1The dimensionless designator NPS(nominal pipe size)hasbeen substit
7、uted in this standard for such traditional terms as nominaldiameter,size,and nominal size.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standard
8、s,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA923 Test Methods for Detecting Detrimental IntermetallicPhase in Duplex Au
9、stenitic/Ferritic Stainless SteelsA941 Terminology Relating to Steel,Stainless Steel,RelatedAlloys,and FerroalloysA999/A999M Specification for General Requirements forAlloy and Stainless Steel PipeE213 Practice for Ultrasonic Testing of Metal Pipe andTubingE309 Practice for Eddy Current Examination
10、of Steel Tubu-lar Products Using Magnetic SaturationE381 Method of Macroetch Testing Steel Bars,Billets,Blooms,and ForgingsE426 Practice for Electromagnetic(Eddy Current)Examina-tion of Seamless and Welded Tubular Products,Titanium,Austenitic Stainless Steel and Similar AlloysE527 Practice for Numbe
11、ring Metals and Alloys in theUnified Numbering System(UNS)2.2 ANSI Standards:4B1.20.1 Pipe Threads,General PurposeB36.10 Welded and Seamless Wrought Steel PipeB36.19 Stainless Steel Pipe2.3 SAE Standard:5SAE J 10862.4 Other Standard:6SNT-TC-1A Personal Qualification and Certification inNondestructiv
12、e Testing1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved March 1,2018.Published March 2018.Originallyapproved
13、in 1981.Last previous edition approved in 2017 as A790/A790M 17.DOI:10.1520/A0790_A0790M-18.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA790 in Section II of that Code.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Se
14、rvice at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.5Available from Society of Automotive
15、Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.6Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM Int
16、ernational,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 2.5 AWS Standard:7A5.9 Corrosion-Resisting Chromium and Chromium-NickelSteel Welding Rods and
