... all kinds of steel pipes like following:1. seamless steel pipe (A53, A106, API 5L, A179, A192, ... DIN1629, DIN17175, Russian standard, Franch stan.)2. stainless steel pipe (304, 316, 316L, 304L, 321, 410, 444, ... GR. 4130, 4140)4. anti-corrosion steel pipe (cement lined and coated, 3PE, IPN8710, 2PE ... , Epoxy powder)5. welded steel pipe (A53, API 5L, BS1387, EN10025) 1Productstainless steel ...