... /ST52-4JISSTKR490 SS400ApplicationOil drilling,boiler,precision machines ,petroleum,Chemical,structure pipe,fluid pipe,linepipe etcPackagingExpor packaging :in bundles,Painting ,Beveled edges,plastic caps ... , DIN, ASTM, API Enclosed some pictures about Steel pipe welding company The equipment of Steel pipe welding company Production Process:Plate Ultrosonic Inspection → Plate ...