Stainless SteelChina ASTM A403 Duplex Steel Pipe 310S S31803 S32205 S32750 Stainless Steel Pipe 6" Sch40/Stock, Find details about China Steel and Pipe, Stainless Tubing from ASTM A403 Duplex Steel Pipe 310S S31803 S32205 S32750 Stainless Steel Pipe 6" Sch40/Stock