ASME B 16.5 Medium pressure pipe flanges with NPT thread

Threaded flange

Threaded flange refers to a flange that uses threads to connect to pipes. When designing, it can be handled as a loose flange. The advantage is that no welding is required, and the additional moment produced on the cylinder or pipe when the flange is deformed is very small. The disadvantage is that the flange is thick and the cost is high. Suitable for connection of high-pressure pipelines.
Implementation principle
Threaded flange is a non-welded flange that processes the inner hole of the flange into pipe threads and connects it with threaded pipes. Compared with flat welding flanges or butt welding flanges, threaded flanges are easier to install and maintain, and can be used on pipelines where welding is not allowed on site. Alloy steel flanges have sufficient strength, but are not easy to weld, or have poor welding performance. Threaded flanges can also be selected. However, it is recommended not to use threaded flanges to avoid leakage when the pipeline temperature changes rapidly or when the temperature is higher than 260°C and lower than -45°C.