ASTM A312 Seamless & Welded Stainless Steel Pipe Standard

ASTM A312 is the standard specification for seamless, welded, and heavily cold-worked austenitic stainless steel pipes used in high-temperature and general corrosive service. It is the most widely used pipe specification in the stainless steel industry, covering everything from 1/8 in. NPS instrument lines to 30 in. NPS processes headers in refineries, chemical plants, power stations, and pharmaceutical facilities.

ASTM A213 Seamless Stainless Steel Tube Standard

ASTM A213 is a standard published by the American Society for Testing and Materials (ASTM) that covers the manufacturing and quality requirements for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes. This standard applies to minimum-wall-thickness tubes made from both ferritic steels (such as T11, T22, and T91) and austenitic stainless steels (such as TP304, TP316, and TP321).

ASTM A789 Duplex Stainless Steel Tube Standard

ASTM A789 is a standard published by the American Society for Testing and Materials (ASTM) that covers the manufacturing and quality requirements for seamless and welded ferritic/austenitic (duplex) stainless steel tubing for general service. This standard applies to duplex grades like UNS S31803 (2205), UNS S32750 (2507), and UNS S32760, where an austenite-ferrite dual-phase microstructure delivers high mechanical strength and outstanding resistance to chloride stress corrosion cracking.