Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. I plant mainly produces diameter 10-273mm, wall thickness 1.0-20mm, length 2-16m American API5L, PI5CT, ASTM standard, DIN, JIS and British Standard BS oil casing, line pipe, hollow pumping pole, general fluid pipe, tube and alloy pipes and other institutions. The company has a modern research center with mechanical properties testing, process performance testing, eddy current testing and other set of testing instruments, as well as a number of highly qualified technology staff and inspection personnel. Companies with strong technical strength, advanced production equipment, complete product specifications and good quality full-service, trusted by customers and people. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube spiral, reasonable price and stock. How to increase the stability of spiral pipe should be selected according to the geographical conditions of the Treasury dn500 spiral, generally use ordinary Treasury enclosed large spiral, that roof with walls, doors and windows tight, with the Treasury ventilation device. Treasury requires attention to ventilation sunny, rainy close attention to moisture, keep proper storage environment. Mastery of Tianjin Steel Trade Co., Ltd. specializes in the supply of various types of spiral pipe, pipe, seamless tube, reasonable price and stock. Density test: storage of liquid or gas welding stainless steel spiral container, which is not dense weld defects such as penetrating cracks, pores, slag, incomplete penetration and loose tissue, etc., can be found in the dense test. Compactness test methods are: kerosene trial, ballast water test, water will test. Tianjin spiral plant, around the steel association (certified), Ningxia spiral from the Tianjin Steel Trade Co., Ltd. Mastery. Mastery of Tianjin Steel Trade Co., Ltd. (www.tjtdgl.com) (www.tdglgt.com) Shandong Liaocheng, steel leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Mastery Steel Union leaders in the staff warmly welcome all inquiries negotiations to create accessible VAI better future.