Shandong Zhongzheng Steel Pipe Manufacturing Co., Ltd. which is located at Liaocheng, one of the biggest steel pipe production base in China. All kinds of CS steel pipes are made and supplied by us with high quality and low price. And We have got two complete production lines: --Cold drawn from size 1/4"-5" OD pipe. --Hot rolled from size 6"-16" OD pipe, also we can work from size 20"-24" as hot expand pipe. Additionally, we have got carbon steel pipe for liquid use(ASTM A106/A53GR.B), steel pipe for casing(P-110, K55, N80 and so on), steel pipe for pipeline(API5L, GR.B, X42, X52, X60, X70), steel pipe for construction(high thickness of ST45, ST52), steel pipe for mechanical(high quality CK45). We promise nothing to our customers except the high quality, low price and first-rate service.If you have anything in need right now or in the near future, please do not hesitate to contact me.We really want to make a long and steady cooperation relationship in the future.