Pipe material: UNS S32001,S31500,S32304,S31803,S32205,S32760,S32750.. Standards: ASTM A789(ASME A789),ASTM A790(ASME A79 1. Commodity name: Duplex pipe,duplex tube2.Process method: cold rolled/cold drawn 3. Surface finish: annealed/pickling 4. Material: UNS S32001,S31500,S32304,S31803,S32205,S32760,S32750.. 5. Standards: ASTM A789(ASME A789),ASTM A790(ASME A790)6. Size: a) O.D.: 6 to 508mm b) ...