Flange thread is a type of flange that is threaded to the pipe. Designed with a loose flange. The advantage is that no welding is required and the additional torque generated on the cylinder or pipe when the flange is deformed is small. The disadvantage is that the flange is thick and the cost is high. Suitable for connection to high-pressure pipes.
The flange thread is a non-welded flange that is formed by machining the inner hole of the flange into a pipe thread and supporting it with a threaded pipe. Compared with the flat welding flange or the butt welding flange, the flange thread has the characteristics of convenient installation and maintenance and can be used on some pipelines where welding is not allowed. Alloy steel flanges have sufficient strength but are not easy to weld, or the welding performance is not good, you can also choose the flange thread. However, it is recommended not to use the flange thread to avoid leakage when the pipe temperature changes sharply or the temperature is higher than 260 °C and lower than -45 °C.