Butt welding flange is a type of pipe fitting, which refers to a flange with a neck and a round pipe transition and connected to the pipe by butt welding. The butt welding flange is not easy to deform, has good sealing, and is widely used. It is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature. The advantage is that the quotation is relatively cheap, and the nominal pressure does not exceed 2.5MPa; it is also used for transportation quotations On pipelines with expensive, flammable and explosive media, the nominal pressure is around PN16MPa.
The correct installation sequence of butt welding flange:
1. First, the inner and outer sides of the connected stainless steel pipe fittings should be sorted out before connecting butt welding flanges.
2. Install the flanges with grooved rings on the pipes that need to be connected.
3. The port of the pipe needs to be treated with a 90-degree flanging process. After the treatment, the plane of the port of the pipe needs to be ground. After grinding, it should be vertical and flat, and there is no doubt about burrs, bumps and deformation, and the nozzle needs to be rounded with special tools. .
4. Another simple method is to use the finished product to flange the short pipe and then weld it on the pipe.
5. Embed the stainless steel sealing ring of the O-shaped rubber sealing ring installed on both sides in the flange with groove ring. The inner hole of the sealing ring is the same as the inner diameter of the pipe.
6. Then connect the flange holes with bolts, and the bolt components need to be tightened symmetrically.
7. When tightening the butt welding flange, attention should be paid to ensure that the tightness of each joint should reach the required specification.
