Hebei Sunpo Metal Products Co., Ltd

State standardgb/t3091-2001, enterprise standard q/bsds 30-2001(idt bs1387: 1985), british standard bs1387 and american standard astm a53 are strictly followed. \r\n\r\nby applying the advanced high frequency welding technique, the sophisticated devices if quality control and resting & experimental measures, and iso9001 quality assurance system in our factory, it has made all the hot-dip galvanized pipes possess reliable welding seams, high accuracy of geometric shape and mechanical property.