astm 304 seamless stainless steel pipe 1)Grade: 304, 304L, 316, 316L, 321 2)Standards: GB, AISI/ASTM, JIS, BS, DIN astm 304 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: 0.2''-12.75 ...