1.1 This specification covers a group of general requirements that, unless otherwise specified in an individual specification, shall apply to the ASTM product specifications noted below. 1.2 In the case of conflict between a requirement of a product specification and a requirement of this specification, the product specification shall prevail. In the case of conflict between a requirement of the product specification or a requirement of this specification and a more stringent requirement of the purchase order, the purchase order shall prevail. Title of Specification ASTM Desig- nation Seamless and Welded Austenitic Stainless Steel Pipes A312/A312M Seamless and Welded Steel Pipe for Low-Temperature Service A333/A333M Seamless Ferritic Alloy-Steel Pipe for High Temperature Service A335/A335M Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service A358/A358M Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service A369/A369M Seamless Austenitic Steel Pipe for Use With High Temperature Central-Station Service A376/A376M Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service A409/A409M Centrifugally Cast Ferritic Alloy Steel Pipe for High-Temperature Service A426/A426M Centrifugally Cast Austenitic Steel Pipe for High- Temperature Service A451/A451M Centrifugally Cast Iron-Chromium-Nickel High-Alloy Tubing for Pressure Application at High Temperatures A608/A608M Welded, Unannealed Austenitic Stainless Steel Tubular Products A778 Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe A790/A790M Single- or Double-Welded Austenitic Stainless Steel Pipe A813/A813M Cold-Worked Welded Austenitic Stainless Steel Pipe A814/A814M Centrifugally Cast Ferritic/Austenitic Stainless Steel Pipe for Corrosive Environments A872/A872M Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal A928/A928M Spray-Formed Seamless Austenitic Stainless Steel Pipe A943/A943M Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe A949/A949M Austenitic Chromium-Nickel-Silicon Alloy Steel Seamless and Welded Pipe A954 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units apply unless the " M " designation (SI) of the product specification is specified in the order. Note 1 -The dimensionless designator NPS (nominal pipe size) is used in this standard for such traditional terms as " nominal diameter, " " size, " " nominal bore, " and " nominal size. " 1.4 The following precautionary statement pertains only to the test method portion, Section 22, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.