Tube

The kinds of the tubing made in the company are as follows: 2 3/8in, 2 7/8in and 3 1/2in NU and EU tubing of J55, N80 and P110 steel grade. After upsetting, the tubing endures full-length heat treatments. The heat treatment procedure is controlled by computers. Tubing production capacity is 100,000 ton per year and the upsetting and heat treatment capacity is30,000 ton per year. With a perfect management system for tubing quality, the company got ISO9001 quality system certificate from Classification Society of China in 1996 and got ISO9001 quality system certificate from API in 1999.Tubing and its coupling is one of main products to be covered with the quality system. In the mean time, the product was also authorized to use API Spec 5 CT monogram in 1999 (Certificate No.5CT-0484). The product is stable and reliable in quality, characteristic data are in accordance with the requirement of API Spec 5 CT specification for Casing and Tubing and API Std.5B Specification for Machining, Measurement.