For longitudinally welded pipes, ERW L290 ERW plant and scale of the northern region straight seam steel pipe manufacturing factory, the company has a world-class straight seam steel pipe production, testing and inspection equipment, the annual production of straight seam steel pipe capacity of 40 million tons, 1/4 inch to 20-inch (outside diameter Φ57mm to Φ660mm) straight seam steel pipe specifications, wall thickness 3mm ~ 22mm ERW ,325-1620mm, wall thickness of 8 ~ 88mm submerged arc straight seam steel pipe, straight seam steel pipe in accordance with the national standards GB/T3091-2001 GB/T13793-92, GB/T6728-2002 organize production; volume of the welding thick-walled pipe 400-4000 * 8-125mm product sales throughout the country and South Asia, the products are mainly used large span Wangjiagongcheng, water gas pipelines, construction, electrical engineering, mechanical, bridge beams, steel structure, foundation piling and other supporting facilities. My company "in good faith principle, the quality of survival, to the credibility of development", welcome new and old customers coming in contact.