The company now holds one φ140-φ381 middle straight seam steel pipe production line and four production lines ofφ219-φ2032 bifilar double-side spiral welding pipes with submerged arcs. The annual production capacity is of 380,000 tons of different specifications and the annual output amounts to RMB1.2 billion. It has imported Lincoin auto-welding equipments from the USA and advanced steel pipes production equipments from Germany which are of specific characteristic both in workmanship and technology. Thus makes it easy to produce qualified steel pipes of Q235,Q345 and X42-×70 grades according to the standards of petroleum industry, national regulations and the API spec 5Lstandards of American Petroleum ,coal gas, natural gas. Heat power. Etc.