Manufacturer of high-quality steel pipe Cangzhou spiral steel company Hebei Tian Hui used in all my company SY/T5037-2000, GB/T9711.1-1997 standards and APISpec5L standard production φ219-φ2320, Q235, Q345, 10 # steel, 20 # steel, 16Mn , L245, L290, L360, X42-X70 grade steel of different thickness, "Tian Hui" brand spiral submerged arc welded steel pipe. Products are widely used in natural gas, petroleum, chemical, electric power, heat, plumbing, steam heat, with hydropower penstock, power generation, water and other long-distance pipelines and piling, bridges, steel and other engineering fields. The company also from Jinxi Petroleum Steel Pipe Plant and Baoji Petroleum Steel Pipe Plant five distinguished industry leading engineers to ensure product quality. The company quality-based, full implementation of quality management. 2001 passed the ISO9002 quality management system certification, and in May 2003 passed the ISO9001-2000 quality management system certification in order to win the trust of our customers quality, science and technology to meet the market, the product that is character, integrity is life. Customer satisfaction is our eternal pursuit. Our commitment: the same quality of steel, steel prices low. http://www.thgangguan.com spiral steel pipe http://www.naimoguanjian.com Spiral Pipe factory tubing http://www.hbthgg.com