zhangjiakou high-tech steel pipe company

Zhangjiakou High-Tech Steel Pipe Co., Ltd. is a corporation who specializes in manufacturing high strength ERW steel tubes for automobile, drilling and liquid service, as well as oil casing tubes for petroleum and natural gas. With the predecessor of Ningyuan Iron & Steel Works established in 1965, our company is one of the earliest manufacturers of electric-welded tubes for cardan shafts.Our company has introduced advanced technology and sophisticated manufacturing equipment. For instance, the high-strength ERW steel pipes lines were imported from Germany; the high frequency induction heating apparatus were brought in from EFD and the threading & coupling lines were from America. The J55 and N80 tubing and casing manufactured by our company had filled the gap in high grade ERW oil casing tubes in domestic market. At present, the annual turnover of ERW pipes is 150.000 tons.The art of state of technology has brought top-ranking quality. Our products have been certified under the ISO... [Details]