... torsional resistance improve the pressure loss completely interchangeable with the API drill pipe tread connection Jinzhou Shenghua Petroleum Geology Machinery Factory ... 100000 tons to 150000 tons.Items: Elbow,Tee,Cross,Socket,Union,Bushing,Backnut, Nipple,Crossover, Caps,Plug etc.We will always ... home and abroad contact with us and promote business relations. API drill pipe