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 Designation |
| Seamless and Welded Austenitic Stainless Steel Pipe | A 312/A 312M |
| Seamless and Welded Steel Pipe for Low-Temperature Service | A 333/A 333M |
| Seamless Ferritic Alloy-Steel Pipe for High Temperature Service | A 335/A 335M |
| Electric-Fusion-Welded Austenitic Chromium-Nickel Alloy Steel Pipe for High-Temperature Service | A 358/A 358M |
| Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service | A 369/A 369M |
| Seamless Austenitic Steel Pipe for Use With High Temperature Central-Station Service | A 376/A 376M |
| Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service | A 409/A 409M |
| Welded, Unannealed Austenitic Stainless Steel Tubular Products | A 778 |
| Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe | A 790/A 790M |
| Single- or Double-Welded Austenitic Stainless Steel Pipe | A 813/A 813M |
| Cold-Worked Welded Austenitic Stainless Steel Pipe | A 814/A 814M |
| Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal | A 928 |
| Spray-Formed Seamless Austenitic Stainless Steel Pipe | A 943 |
| Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe | A 949 |
| Austenitic Chromium-Nickel-Silicon Alloy Steel Seamless and Welded Pipe | A 954 |
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. With the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall 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 21, 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.
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