Zhongyuan Pipeline Manufacturing Co., Ltd. (originally known as Hebei Zhongyuan Steel Pipe Manufacturing Co., Ltd. ), is situated at South Industrial Zone, Yanshan, Hebei, covering an area of 545, 000 m2 and a construction area of 210, 000 m2. It has a total asset of RMB 1.1 billion and 1100 staffs. It has 4 advanced production lines of ERW hot rolling steel tubes, 12 production lines of spiral seam double submerged arc welding steel pipelines, 2 production lines of petroleum casing pipes and 1 coating production line of three layers of polyolefin (PE, PP) in the specification of φ 508mm-φ 1820mm and 1 internal and external epoxy anti-corrosion production line in the specification ofφ 508mm-φ 3200mm. The high-standard physical and chemical laboratories and advanced testing equipment is a reliable guarantee for the product quality. The main products are spiral seam double submerged arc welding steel pipelines with φ 219mm-φ 3200mm, wall thickness of 5mm-25.4mm and B-X80 steel grade, ERW hot rolling steel tube withφ 89mm-φ 630mm and wall thickness of 4mm-12.7mm and the petroleum casing pipe withφ 139.7mm-φ 339.