Line Pipe Manufacturer. ZheJiang Ningsheng Steel Pipe Co., Ltd was the predecessor of Ningbo Zhenhai Shengda steel-wares Manufacturing Co., Ltd., having nearly 15 years of longitude submerged arc welding penstock production experience. We have been a supplier of Sinopec network for a long time, working with the projects of Sinopec Ningbo Engineering Co., Ltd. and Zhenhai Refining & Chemical Co., Ltd. The company has been a major steel pipe supplier for important construction projects such as Benxi Steel Group project, Sinopec Guangxi Qinzhou Port Project, Shanghai LNG terminal project, Zhanhua Ammonia Project, Guizhou Tianfu chemical fertilizer project, the East Sea Bridge project, Shanghai Minpu Bridge project, the East Sea wind power projects, Xining stadium project, Ningbo ring water supplying project and Jaxing circulating water of power plant projects etc.. In 2010, the company plans to invest over 110 million yuan in introducing advanced JCOE straight seam steel tube production line, foreign special JCOE extra-thick straight seam steel tube production line, which fills the domestic blank, the advanced extra-thickness spiral pipe production line.