BGT2 Tubing Pipe Fitting

BGT2 tubing pipe fitting

The structural design of special threaded joints has certain characteristics. The sealing structure of the joint does not rely solely on screw fitting and thread sealing grease, but mainly uses a main sealing structure, such as a metal seal or an elastic sealing structure.

Special screw joints increase internal or external torque shoulders. The main purpose of designing torque shoulders is to control the buckle torque, to overcome the adverse effects of API screw joints' buckle position and wide torque range on their performance, and to improve the joint's resistance to sticking Fastening and over-torque resistance. In addition, the torque shoulder can also control the interference amount of threads and seals to ensure that the interference interference amount of the main seal can be well controlled. The torque shoulder has an auxiliary sealing effect, and can also improve the compression resistance of the joint. The shoulder shape is generally a right-angle shoulder, such as TM, HYD CS special buckle replacement, NK 3SB, NSCC; arc shoulder, such as FOX; bevel shoulder, such as SEC. Generally, the trapezoidal buckle is used for the thread buckle. Only the shape is adjusted appropriately. For example, the bearing surface angle adjustment range is -25 ° ~ 3 °. Joint resistance to composite loads. There are also joints with constant pitch, such as TM type; joints with variable pitch, such as FOX type.

Types of main sealing structure can be divided into: tapered surface and tapered surface, such as TM, NSCC, SEC, etc spherical surface and tapered surface, such as NK 3SB