Tianjin Zhongshun Petroleum Steel Pipe Co., Ltd. Is a leading manufacturer of steel pipe in China. We supply ERW steel pipe, Spiral welded pipe, Anti-corrosion pipe, galvanized pipe, seamless pipe, square pipe etc. Acc. To spec API 5L, API 5CT, ASTM A53, ASTM A252, EN10217, EN10219, BS1387 etc.