What are the regulations for casing threads?
Internationally, the requirements for casing threads between one pair of inner and outer cones meet the requirement of end face allowance only, and the axial displacement can be used to complete the interference of the connection surface. And it can be used to improve the processing quality of the connection area, increase the axial force to increase the pressure of touch area and touch area, and then get a more compact ring pressure touch area. The larger the touch area, the less likely the leakage path is, and the more reliable the sealing function is. Casing thread is a special conical seal with thread grooves and taper pipe threads. When the conical tube thread meets, only the surface allowance is satisfied, and the preload in the seal surface can be easily obtained by tightening the thread and causing the axial displacement. After reviewing the conical sealing method, when the inner and outer cone threads match each other, a continuous and discontinuous ring pressure contact...