... , 321 2)Standards: GB, AISI/ASTM, JIS, BS, DIN, ISOT Stainless Steel PipeFeatures:1)Size: 15mm*15mm to 300mm*300mm2) Wall Thickness ... reduce the overall cost8) Certificate: ISO, TSG, OIISAS9) The stianless steel pipe 304 is applicable to fluid transport and high pressure ... . 10) Special pipes according to customers' needs are avalible. seamless stainless steel square tube