Zhangjiakou High-Tech Steel Pipe Co., Ltd. was established in 2005, on the basis of Ningyuan Iron & Steel Works which had changed its old economic is one of the manufactures that have specialized in producing the electrically-welded steel pipes the earliest in China.The company has equipments and technologies of the high-strength electrically-welded steel pipes line which were imported from high frequency induction equipment is imported from EFD, which is in equipments of threading line of tubing and casing used for petroleum and the process line of coupling were imported from whole equipments and process technologies is advanced in the tubing and casing of grade J55 and N80 which produce in the company have covered the blank of high grade ERW tubing and casing in the production line of tubing of grade N80 is the only one in the company can produce 150.000 tons tubing and casing a year.According to ISO 9001ãAPI Spec Q1, the company have implemented an efficient quality assurance standard used for product is API 5CTãAPI ERW tubing and casing which produced by the company is certificated by Tubular Goods Research Center of CNPC in November, product have the advantage of high precision, good toughness, low price and can resist crush and burst well, can instead of seamless tubing and casing gradually, to reduce the cost of the establish of the well.The company is conveniently located in High-Tech New District, Zhangjiakou city, occupying an area of 164082 square meters and has a 3.5Km special railway line.The company has been adhering to the principle of Quality First and keeping introducing the advanced technology and learning up-to-date management experience from home and broad, ensured to provide products with excellent quality to all customers.