Tianjin Hengfeng Union Steel Pipe Co., Ltd. is located in the southeast of Tianjin, occupying a land area of one hundred acres. We are factory specializing in the manufacture and export of steel pipe for more than ten years in China, products including Spiral steel pipe, ERW steel pipe, Hot-dipped galvanized steel pipe, Pre-galvanized steel pipe, Square and Rectangle steel pipe. Our Mill has built a complete and effective quality system under ISO 9001. With the approval of American Petroleum Institute, the mill is awarded with API 5L certificate. Steel Pipes we offered conform to international standards such as EN, BS, ASTM, DIN, JIS, etc, and can pass any third party inspection like SGS, BV. In order to assure compliance to applicability terms, we assess the pipes through a set of proven tests and inspections including Tensile Tests, Corrosion Tests, Mechanical Tests, Dimensional Inspections, Hydrostatic Test, etc.