Boiler seamless stainless steel pipe 1)Grade: 304, 304L, 316, 316L, 321 2)Standards: GB, AISI/ASTM, JIS, BS, DIN Boiler seamless stainless steel pipe1)Grade: 304, 304L, 316, 316L, 321 2)Standards: GB, AISI/ASTM, JIS, BS, DIN Grade(UNS):304/304L; 316/316L; 321; 310SOutside Dia:3.05mmWall Thickness:73mmStandards(Norm):ASTM A312, S312M, ASTM A213, ASTM A269,DIN17440,DIN17224, ...