Tianjin Jinggong Petroleum pipe fitting co., Ltd mainly produces Petroleum tubing and casing coupling. We are one of the 4 of most competitive corporation in China. We are the designated supplier of Tianjin days Steel Oil Pipe Co., Ltd. for casing coupling and tubing coupling, which products 4 million a year. Our products had all passed the standard test of API Spec 5CT, and get well evaluate based on our high pursuit and tireless efforts of quality. Our raw materials were chosen from the suppliers which passed certification of API such as Tianjin Seamless Steel Tube Plant. Our internal control standard which is just less 0.2 times than standard tolerance of API used wet fluorescent magnetic particle inspection equipment for NDT. Coupling thread parameters used Thread single instrument to test.Thread surface used nonstick deduction phosphating solution for phosphatizing. That can make more than 4 times of breakout.welcome to come to our space!
