... :1. seamless steel pipe (A53, A106, API 5L, A179, A192, A213, A333, DIN1629, DIN17175, Russian standard, Franch stan.)2. stainless steel pipe (304, ... 316, 316L, 304L, 321, 410, 444, 430)3. alloy steel pipe (ASTM ... 2PE, Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel pipe2StandardU.S.A.ASTM A312/A213/ ...