COMPANY PROFILE:ZHEJIANG SIEN INDUSTRIAL CO., LTD was established in 2000. We are manufacturer of carbon steel pipes and trader of pipe fittings and flanges and also other related accessories for pipeline. We have total 180 staff .including 20 professional technicians, Our Head office and production base is in Cangzhou City, Hebei Province. Near Tianjin sea port.Our main market is in The Middle east, South America, South east of Asia. Africa. And part of Europe.We didn€™t export ourself, we export through our partner of SHAAN XI SUCCEED TRADING CO., LTD. All of our export business do like this. OUR PRODUCTS: 1.CARBON STEEL SEAMLESS PIPES.(BLACK PAINT or GALVANIZED or 3PE COATING)ASTM A106 / ASME SA106 / Seamless Carbon Steel Pipe for High Temperature ServiceAPI 5L Line Pipe X42ã€X46ã€X52ASTM A53 / ASME SA53 / Pipe Steel Black and Hot Dipped Zinc Coated ASTM A179 / Seamless Cold Drawn Low Carbon Steel Heat Exchanger and Condenser TubesASTM A192 / ASME SA192 / Seamless Carbon Steel Boiler Tubes for High Pressure ServiceASTM A210 / ASME SA210 / Seamless Medium Carbon Steel Boiler and SuperheaterASTM A333 / ASME SA333 / Steel Pipe for Low Temperature ServiceDIN1629 / Seamless Circular Tubes of Non Alloy Steels with Special Quality Requirements(St 37.0/St 44.0/St 52.0/1.0254/1.0256/1.0421) .DIN2444 / Zinc Coatings on Steel TubesDIN2448 / Seamless Steel Pipes and TubesDIN2449 / Seamless Steel Pipes and TubesBS1387 / Steel Tubes 2. CARBON STEEL WELDED PIPES (ERW. SSAW.LSAW)API 5L Line Pipe X42ã€X46ã€X52ASTM A53 / ASME SA53 / Pipe Steel Black and Hot Dipped Zinc Coated WeldedASTM A178 / ASME SA178 / Electric Resistance Welded Carbon Steel Boiler TubesASTM A333 / ASME SA333 / Welded Steel Pipe for Low Temperature ServiceDIN1628 / Welded Circular Tubes of Non Alloy Steels with Very High Quality Requirements(St37.4/St44.4/St52.4) SPECIAL SIZE IS ALSO AVILABLE QUALITY CONTROL:We understand quality is the most important factor of doing long time business and make company living longer. We care quality very much. we insure every piece of pipe will satisfy of chemical analysis, water pressure testing, X-ray inspection, ultrasonic testing, eddy current inspection, tension testing, chemicaltesting, etc also we have testing equipment for the testing. And we accept any kinds of third party inspection arranged by customer during production or after production. If you have any demand of carbon steel pipes please don€™t hesitate to contact us. We hope we can be your long time partner. We promise we will be honest to every customer for ever!