... kinds of steel pipes like following:1. seamless steel pipe (A53, A106, API 5L, A179, A192, A213, A333, DIN1629, DIN17175, Russian standard, Franch ... coated, 3PE, IPN8710, 2PE, Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel pipe2StandardU.S.A.ASTM A312/A213 ...