Cangzhou Zhongshun Steel Pipe Trade Co., Ltd is a china–leading product service provider and exporter of steel pipe and pipe fittings.the Company mainly engaged in oil casing, seamless steel pipe and other products.our company can produce all kinds of steel pipes according to the standard of  API, astm, EN, JIS, BS, DIN and so on. The steel grades are GRA,GRB, X42, X80, H40, J55, k55 ,S355, A333, ST42, STK 400, 500 and so on.