Operation method for welding flanges
21-11-12
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Welding flanges are not easily deformed, have good sealing, are widely used, have corresponding requirements for rigidity and elasticity, and reasonable welding thinning transition. The distance between the weld and the joint surface is large
Welding flanges are not easily deformed, have good sealing, are widely used, have corresponding requirements for rigidity and elasticity, and reasonable welding thinning transition. The distance between the weld and the joint surface is large, and the joint surface is free from welding temperature deformation. It adopts a relatively complex trumpet shaped structure and is suitable for pipelines with large pressure or temperature fluctuations or high temperature, high pressure, and low temperature pipelines. It is generally used for the connection of pipelines and valves with PN greater than 2.5MPa; It is also used on pipelines that transport expensive, flammable, and explosive media.
1、 Firstly, before connecting the welded flanges, the inner and outer sides of the stainless steel fittings to be connected should be sorted.
2、 Install the flanges with slotted rings onto the pipes that require connection.
3、 The port of the pipe needs to be processed with a 90 degree flanging process. After processing, the flat surface of the pipe's port needs to be polished. After polishing, it should be vertical and flat, and there should be no burrs, bumps, or deformations. The pipe mouth needs to be rounded with specialized tools.
4、 Another simple method is to use finished products to flange short pipes and then weld them onto the pipe material for use.
5、 Insert O-ring rubber seals and stainless steel seals installed on both sides into the flange with slotted rings. 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 tighten the bolt components symmetrically.
7、 When tightening the butt welding flange, it is important to ensure that the sealing at each joint meets the required specifications.
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