Jiangyin Changgang Pipe Making Co., Ltd. was invested and co-established by Jiangyin City Seamless Steel Tube Factory and Hongkong Changhong International Investment Limited in 2005.The registered capital was 18 million US dollars and the total investment was 44 million US dollars. Changgang is a developed enterprise with a high-tech scientific research, specializing in producing petroleum drill pipe. Changgang has an annual output of 20,000 tons of drill pipes. Changgang is a manufacturer certified by API Spec 5DP?API Spec Q1?ISO 9001:2000 and ISO/TS 29001.
Jiangyin Changjiang Oil Special Pipe Manufacture Co., Ltd. is a professional oil pipe manufacturer. The registered capital was 12 million US dollars and the total investment was 37 million US dollars, which has an integrated annual production capability of 450,000 tons of OCTG, mainly produces casing, tubing, line pipe and so on. Changjiang is a manufacturer certified by API Spec 5CT?API Spec Q1?ISO 9001:2008?ISO/TS 29001 and API Spec 5L.