Tianjin Hengji Steel Co., Ltd. We are the leading manufacturer and exporter of steel pipe products in China. established in 2000. Total annual output of 600,000 tons. We advantage has always been our ability to hight quality, deliver on time and Sincere service. We are an ISO 9001 Certified Company, main supply ERW steel pipe and galvanized hollow section. Our products follow the standard of ASTM,BS,GB ect.Looking forward to the cooperation with your.