ASTM-A999-2023

This 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.Designation:A999/A999M-23TERNATIONALStandard Specification forGeneral Requirements for Alloy and Stainless Steel PipeThis standard is issued under the fixed designation A999/A999M;the number immediately following the designation indicates the yeaof 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 (s)indicates an editorial change since the last revision or reapproval.1.Scope*Single-or Double-Welded Austenitic Stainless Steel PipeA813/A813M1.1 This specification2 covers a group of general require-Cold-Worked Welded Austenitic Stainless Steel PipeA814A814MCentrifugally Cast Ferritic/Austenitic Stainless Steel PipeA872A8724ments that,unless otherwise specified in an individualfor Corrosive Environmentsspecification,shall apply to the ASTM product specificationsFerritic/Austenitic (Duplex)Stainless Steel Pipe ElectricA928A928MFusion Welded with Addition of Filler Metalnoted below.Spray-Formed Seamless Austenitic Stainless Steel PipesAqM3A日M31.2 In the case of conflict between a requirement of aSpray-Formed Seamless Ferritic/Austenitic Stainless SteelA949A949MPiDeproduct specification and a requirement of this specification.Austenitic Chromium-Nickel-Silicon Alloy Steel SeamlessA954the product specification shall prevail.In the case of conflictand Welded Pipebetween a requirement of the product specification or a1.3 The values stated in either SI units or inch-pound unitsrequirement of this specification and a more stringent require-are to be regarded separately as standard.Within the text,thement of the purchase order,the purchase order shall prevail.SI units are shown in brackets.The values stated in eachTitle of SpecificationASTM Desig-system may not be exact equivalents;therefore,each systemnationshall be used independently of the other.Combining valuesSeamless,Welded,and Heavily Cold Worked AusteniticA312UA312Mfrom the two systems may result in non-conformance with theStainless Steel Pipesstandard.The inch-pound units apply unless the"M"designa-Seamless and Welded Steel Pipe for Low-TemperatureA333/A333Mtion (SI)of the product specification is specified in the order.Service and Other Applications with Required NotchTouahnessNorE 1-The dimensionless designator NPS (nominal pipe size)is usedSeamless Ferritic Alloy-Steel Pipe for High TemperatureA335/A335Min this standard for such traditional terms as "nominal diameter,""size."Servicenominal bore,”and“nominal size."Electric-Fusion-Welded Austenitic Chromium-Nickel StainlessA358/A358MSteel Pipe for High-Temperature Service and General1.4 The following precautionary statement pertains only