Hengyang Hongling Petroleum Pipe Co., Ltd. Is a joint capital company. the registered capital of Hongling is RMB 34.15 million, fixed asset is RMB 58.17 million, and net asset is RMB 120 million. Now Hongling has developed into a large process manufacturer of all sizes of OCTG at home and abroad. Our business scope includes the manufacture, sale and technology development for steel pipes used as tubing, casing, drill pipes and couplings in petroleum and natural gas industries, and also the development and service of high-tech steel pipes used in petroleum and natural gas industries. the annual production capability of Hongling is 500,000 tons of OCTG and 3 million pieces of couplings. Production size is from dia. 48.3mm to dia. 508mm. Our company can produce all kinds of API connections and various premium connections with the steel grades of J55, N80, L80, P110, Q125, G105, S135 and 13Cr. At present, Hongling has 10 threading lines of OCTG from dia. 48.3m to dia. 177.8mm, 10 threading lines of casings from dia. 177.8mm to dia. 508mm. Our company has 54 NC machines for coupling blanks and couplings. the production export ratio is more than 70%. Hongling has a complete quality control system and normative management processes. We persist in the business principle of " Quality first, customers first", based on the quality requirements of GB/T 19001-2000 and API Spec Q1-2003. the quality of the products has been improved continuously. Hongling has obtained the certificates of ISO9001:2008, ISO14001, API Spec Q1-2008 and API 5CT. the products enjoy high reputation around the world, and the market share is increasing year by year. Your interest in our products is greatly appreciated by all the employees of Hongling. We are looking forward to long and close cooperation with our existing and future customers, and are seeking opportunities to grow and develop together.