stainless steel pipe: 304/304L, 316/316L, 321, 310S, EN1.4404, EN 1. ... an experienced company specializing in manufacturing and exporting Seamless stainless steel pipes and tubes. (1) Grades : 304/304L, 316/316L, 321 ... , 310S, EN1.4404, EN 1.4301, ect. (2) Standards : ASTM, GOST, JIS, DIN, ect. (3) Sizes : OD: 6mm - -410mm WT ...