Process: 1/2' -20": (Cold Extrusion Forming) 22" - 48": (Hot Extrusion Forming) Sizes : (Seamless Type): 1/2” -20” (DN15-DN500) (Welded Type): 1/2" -48" (DN15-DN1200) Standards: GB/T12459, GBJ13401, SH3408. SH3409; ASME/ANSI B16.9, B16.28, ASTM A403, MSS SP-43; DIN 2605, DIN2609, DIN2615. DIN2616; JIS B2311, JIS B2312, JIS B2313 Schedules: Sch5S-Sch80S; Sch10-Sch160; XS-XXS Materials: TP304; TP304H; TP304L; TP316; TP316L; TP321; TP321H; TP317L: TP310S; TP347H