Specifications: 1) Product name: screw shaped steel pipe 2) Model: assorted steel pipe 3) Type: duplex and austenitic 4) Process method: cold drawn, cold rolled 5) Surface finish: annealed, pickled, polished, 6) We can produce specifications according to customers\'\' requirements 7) Materials: TP304, TP304L, TP310/S, TP316L, TP316/316L dual grade, TP317L, TP321, TP347, 2205 (S31803), 2507 8) Internal technical standards implemented: GB/T 14975-2002, GB/T 14976-2002, GB 13296-91 9) Foreign standards implemented (partial): JIS G 3463, JIS 3448, JIS 3459, DIN 2462 10) ASTM (ASME) standards: a) A213 / A213M (SA213 / SA213M) b) A269 / A269M c) A312 / A312M (SA312 / SA312M) d) A450 / A450M (SA450 / SA450M) e) A1016 / A1016M (SA1016 / SA1016M) f) A530 / A530M (SA530 / SA530M) g) A789 / A789M (SA789 / SA789M) h) A790 / A790M (SA790 / SA790M) 11) Applications: a) General services industries (petroleum, food, chemical, paper, fertilizer, fabric, aviation and nuclear) b) Fluid, gas and oil transport c) Pressure and heat transmission d) Construction and ornament e) Boiler heat exchangers Inner packing: Wooden cases, bundle or plastic bags, plywood boxes