seamless stainless stainless pipe steel grade:304,316l,301,310S,321,321H and so on Features:1) ... are corrosion and high-temperature resistant3) The main standards are 304, 304L, 316, 316L, 321, 321H, 310S, 347H4) Standards: GB/T14975 ... petroleum, smelting, foodstuff, power,papermaking, chemical, medical equipment, aviation, boiler Seamless Stainless Steel Pipe