ASTMA790

Designation:A 790/A 790M-05aStandard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelPipe1This sandard is issued under the fixc designation A 790M:the immediately following the designati indicates the yearof original adaption or.in the case of revision.the year of last revision A number in parentheses indicates the year of last reapprval.I.Scope*A 941 Terminology Relating to Steel,Stainless Steel.Re-1.f This specification-covers seamless and straight-seamlated Alloys and Feroalloyswelded ferritic/austenitic steel pipe intended for generaf corro-A 999/A 999M Specification for General Requirements forsive service.with particular emphasis on resistance to stressAlloy and Stainless Stec Pipecorrosion cracking.These steels are susceptible to embrittle-F.213 Practice for Ultrasonic Examination of Metal Pipement if used for prolonged periods at elevated temperatures.and Tubing1.2 Optional supplementary requirements are provided forH3(%)Practice for Eddy-Current Examination of Stcel Tu-pipe when a greater degree of testing is desired.Thesebular Products Using Magnetic Saturationsupplementary requirements call for additional tests to be made31 Methed of Macroeteh Testing Steel Bars.Billets.and,when desired.one or more of these may be specitied in theBlooms.and Forgingsorder.H420 Practice for Electromagnetic (Eddy-Current)Exami-1.3 Appendrx XI of this specification lists the dimensionsnation of Seamless and Welded Tubular Products.Austen-of welded and seamless stainless steel pipe as shown in ANSIitic Stainless Steel and Similar AlloysB36.19.Pipe having other dimensions may be furnishedF 527 Practice for Numbering Metals and Alloys (UNS)provided such pipe complies with all other requirements of this2.2 ANSI Standards:pecification.B1.20.I Pipe Threads,General Purpose1.4 The values stated in either inch-pound units or SI unitsB36.10 Welded and Seamless Wrought Steel Pipeare to be regarded separately as standard.Within the text,theB36.19 Stainless Steel PipeSI units are shown in brackets.The values stuted in each2.3 SAE Srandard:5system are not exact cquivalents:therefore.each system mustSAE J 1086be used independently of the other.Combining values from the2.4 Other Standardtwo systems may result in nonconformance with the specifi-SNT-TC-1A Personal Qualification and Certification incation.The inch-pound units shall apply unless the M desig-Nondestructive Testingnation of this specification is specified in the order.2.5 AWS StandardA5.9 Corrosion-Resisting Chromium and Chromium-Nore 1-The dimensionless designator NPS (nominal pipe size)hasNickel Steel Welding Rods and Electrodesbeen suhstituted in this standard for such traditional terms as nominaldiameler.size,and nominal size.3.Terminology2.Referenced Documents3.I Definitions-For definitions of terms used in this speci-2.1 ASTM Standards:fication refer to Terminology A 941.A37 Test Methods and Definitions for Mechanical Testing4.Ordering Informationof Steel Products4.1 Orders for mat