For Longitudinal, GB longitudinally welded pipes, Q345B GB longitudinally welded pipes plant is the northern region and scale 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 capacity 40 million tons of straight seam pipe size 1/4 inch to 20-inch (outer diameter Φ57mm to Φ660mm), wall thickness 3mm ~ 22mm ERW ,325-1620mm straight seam submerged arc wall thickness of 8 ~ 88mm steel pipe, straight seam steel pipe production organized in accordance with the national standard GB/T3091-2001, GB/T13793-92, GB/T6728-2002; volume and welding thick-walled pipe 400-4000 * 8-125mm product sales throughout the country and South Asia The products are mainly used for large span Wangjiagongcheng, water and gas pipes, construction, power engineering, machinery, 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.