1) Grade: 304, 316L, 321H, 317L, 347H, 310S, 2205, 2507, 904L 2) OD: ... , 316/L, 321/H, Surface: Pickled & Annealed 300 series stainless steel pipe 1) Grade: 304, 316L, 321H, 317L, 347H, 310S, 2205, 2507, 904L 2 ... EN 10297-2006(DIN 17456),GL LR DNV, etc. 430 welded stainless steel pipe