Hebei zhonghai steel pipe manufacturing co.ltd

Our products not only base on ISO9001-2000 series,but also passed the certification of API. Our featured products are big size seamless steel pipe,hot-rolled steel pipe,hot-expanded steel pipe and spiral steel pipe .Diameter between 8"and 48",wall thinkness from 6mm-60mm. These products are widly used in extraction and processing of petroleum and natural gas , pipeline transportation, machinofacture, boilermaking, and the big construction item.