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Correct installation sequence and manufacturing process of welding flanges

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Correct installation sequence and manufacturing process of welding flanges

Release date:2019-03-05 Author:锻件网 Click:

Shaft forgings manufacturers talk about the correct installation sequence and manufacturing process of welding flanges

Butt welding flange is also called the high neck flange, flange or big tail is one of the types of pipe fittings, refers to with a neck and a circular tube transition and pipe butt welding connecting flange. Butt welding flange is not easy to deformation, good sealing, wide applicability, suitable for pressure or temperature fluctuations of pipeline or high temperature, high pressure and low temperature pipes, strength is compared with cheap price, nominal pressure no more than 2.5 MPa; Also used to transport expensive, flammable, explosive media on the pipeline, the nominal pressure at PN16MPa or so.

Accurate installation sequence shall be used for welding flanges:

1, first in the connection of welding flange before the connection of the stainless steel pipe fitting inside and outside finishing.

2. Install the flange with grooved ring on the pipe with connecting demand.

3. The pipe end needs 90-degree flanging process. After treatment, the pipe end plane needs to be polished.

4, there is a brief method is to use finished products for flanging short pipe and then welding it on the pipe.

5, in the flange with grooved ring embedded on both sides of the o-type 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 bolt the flange holes together. The bolt assembly shall be tightened symmetrically.

7. When tightening the butt welding flange, pay attention to the sealing of each joint to reach the required specification.

Butt welding flange is a kind of pipe fitting, it is to point to the flange with neck and round pipe transition and butt welding connection with the pipe. Welding flange is not easy to deformation, sealed, widely used, suitable for pressure or temperature fluctuations in the pipeline or high temperature, high pressure and low temperature pipeline, advantage is relatively cheap quotation, the nominal pressure is not more than 2.5MPa; It is also used for conveying expensive, flammable and explosive media with nominal pressure around PN16MPa.

There are two production techniques of butt welding flange:

Die forging, is to heat up the steel material in the heating furnace to 1200C, and then put into the corresponding specifications of the mold forging molding.

Free forging is to raise the temperature of the material in the heating furnace to 1200C, and then forge the square material into the shape of a round cake, and punch the hole.


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