Stainless Steel and Duplex Pipe (ASTM A312, A790)
13 Comments. The ASTM A312 specification covers seamless and welded austenitic stainless steel pipes used for high temperature and/or corrosive service (the most common grades are 304/304L and 316/316L). The A790 specification covers seamless duplex and super duplex pipes UNS S32205/31803 and UNS S32750/32760 (special SS …