Cangzhou Sined Steel Pipe Group co., Ltd now holds six Lincoln automatic manufacture lines of bifilar and double-side spiral seam welding pipes with submerged arcs (SSAW) which are introduced from the USA. The annual production capacity is about 300,000ts of different specifications of spiral welded steel pipes which are arrange from �219mm to�3500mm,wall thickness from 6mm to 25.4mm.Our products can widely-used in many infrastructure areas, such as petroleum, coal gas, natural gas, water supply and heat power of electricity industries,ssaw steel water pipes, ssaw steel gas pipe, steel casing pipe,steel petroleum pipes,pipe piles etc.