... A333, DIN1629, DIN17175, Russian standard, Franch stan.)2. stainless steel pipe (304, 316, 316L, 304L, 321, 410, 444, 430)3 ... and coated, 3PE, IPN8710, 2PE, Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel pipe2StandardU. ... Equipment and Detector-Process-Application-Other Leading steel pipe---carbon steel pipe↓---Anti-corrosion steel pipe↓ ---welded steel pipe↓