... , DIN1629, DIN17175, Russian standard, Franch stan.)2. stainless steel pipe (304, 316, 316L, 304L, 321, 410, 444, 430 ... , 3PE, IPN8710, 2PE, Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel pipe2StandardU. ... Commerce↓---ISO 9001↓-Equipment and Detector-Process-Application-Other Leading steel pipe---carbon steel pipe↓---Anti-corrosion steel pipe↓ ---welded steel ...