We always attach highly-importance to the quality of the products and made constantly technical reform to the production process and testing＆inspecting equipments. With the continuous development of the production ,as well as enhanced quality control of the products to better meet the demand of the customers, we purchased a great number of advanced testing＆inspecting equipments including X-ray industrial TV, X-ray real-time photographing system, online ultrasonic automatic flaw detector, hydrostatic pressure testing machine ,universal materials testing machine, impact testing machine, carbon and sulfur analysis and testing machine ,etc. We guarantee that our products all meet the standard requirements of API-5L,SY/T5037-2000, GB/T9711.1-1997, thus, it sells to more than 20 provinces and regions throughout China and enjoys universally trust and praise from the customers.