Butt welding flange, also known as high neck flange, is a kind of pipe fitting, refers to the neck and a round pipe transition and pipe butt welding flange connection. Welding flange is not easy to deformation, good sealing, widely used, suitable for pressure or temperature fluctuation of pipelines or high temperature, high pressure and low temperature pipelines, advantages are cheap price comparison, nominal pressure does not exceed 2.5mpa; It is also used for transporting expensive, flammable and explosive media on the pipeline, and the nominal pressure is about PN16MPa.

Correct installation sequence of butt welding flange:
1. First of all, before connecting the butt welding flange, the inner and outer parts of the stainless steel pipe fittings should be arranged.
2. Install the flanges with slot rings on the pipes with joint requirements respectively.
3. The port of the pipe needs 90 degree flanging process processing. After processing, the port plane of the pipe needs to be polished.
4. There is also a simple method that is to use the finished product to flange the short pipe and then weld it on the pipe.
5. in the flannel with groove ring embedded on both sides of the o-shaped rubber sealing ring stainless steel sealing ring. The inner hole of the sealing ring is the same as the inner diameter of the pipe.
6. Then connect the flange hole with a bolt, and tighten the bolt assembly symmetrically.
7. When tightening butt welding flanges, pay attention to the tightness of each joint and reach the required specifications.
Butt welding flange is a kind of pipe fitting, which refers to the flange with a neck and a round pipe transition and butt welding connection with the pipe. Welding flange is not easy to deformation, good sealing, widely used, suitable for pressure or temperature fluctuation of pipelines or high temperature, high pressure and low temperature pipelines, the advantage is that the price is relatively cheap, nominal pressure does not exceed 2.5mpa; It is also used for conveying expensive, flammable and explosive medium on the pipeline, and the nominal pressure is about PN16MPa.