We are Zhangjiakou High-Tech Steel Pipe Co., Ltd which specialized in manufacturing the precision steel tubes for automobile, oil casing tubes for petroleum and natural gas, steel tubes for drilling, steel tubes for liquid service and high strength welded steel tubes. The outside diameter of tubing isΦ2-3/8'-Φ4-1/2' ,and the outside diameter of casing is Φ4-1/2'-Φ5-1/2'. Grade for tubing and casing includes H40, J55, K55, and N80. On Jan 11, 2008, we have become the supplier of CNPC (China National Petroleum Corporation). It is proved by Tubular Goods Research Center of CNPC that ERW tubing and casing have the advantage of high precision, good toughness, low cost and can resist crush and burst well, etc. Gradually, they will replace seamless tubing and casing to reduce the cost in well construction.
Compared with similar products, our pipes are of higher quality and more competitive price. We always provide pipes with superior/guaranteed quality and moderate price.