... -20) x (4000 - 13000)mm 2)The main standards are 304, 304L, 316, 316L, 321, 321H, 310S, 347H 1) Size: (6 ... are corrosion and high-temperature resistant3) The main standards are 304, 304L, 316, 316L, 321, 321H, 310S, 347H4) Standards: GB/T14975 ... , chemical, medical equipment, aviation, boiler heat-exchanger and other fieldsStainless Steel Pipes(special steel pipe,steel tube Stainless Steel tubes 304