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The two bolt sealing surfaces compress the flange gasket and seal against each other
Since the advantage of non-standard flange seal is that it is convenient to inspect nuclear power plants, it has its supporters, especially when adopting a new sealing structure. The flat welding flange is a flange that is directly welded to the equipment or pipeline through the fillet weld. The structure is simple and the processing is convenient. Its stress characteristics are between the integral flange and the loop flange. The flat welding flange is divided into plate flat welding flange and neck flat welding. The flat welding flange is low in cost and short in production cycle. It is more commonly used. A flange type widely used in various fluid pipelines. The butt welding flange is a kind of pipe fitting, which refers to a flange with a neck and a round pipe transition, and is connected to the pipe by butt welding.
The two bolt sealing surfaces compress the flange gasket and seal against each other
It 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 high-temperature, high-pressure and low-temperature pipelines.
The advantage is that the price is relatively cheap, and the nominal pressure does not exceed 2.5MPa; On the pipeline of flammable and explosive medium, the nominal pressure is about PN16MPa.
Stainless steel flange gasket is a medium that can produce plastic deformation and has a certain strength. In large closed containers (tanks, towers, pipelines) for maintenance and repair or other needs, there will be holes and passages for people and goods to enter and exit, so that the flange connection of the manhole flange will be left. The forming mold uses a part of the main model or sprays low-melting point alloy and perfect, or the main model surplus plastic (structure: synthetic resin, plasticizer, stabilizer, colorant) is extruded into sheet material. If post-weld heat treatment of weldments cannot be performed, it should choose chrome-nickel stamping flanges.
The two bolt sealing surfaces compress the flange gasket and seal against each other
Different types of electrodes have different performance and characteristics in use, and the corresponding selection is used according to the needs to ensure the quality of the welded stamping flange. There are two types of flat welding flanges: plate flat welding steel pipe flanges and neck flat welding steel pipe flanges. When the diameter of the mandrel is too small or seriously worn with the important pipe bender, a suitable mandrel should be replaced, and the unilateral gap between the mandrel and the pipe wall should not be greater than zero. The principle of ANSI flange sealing is very simple: the sealing surfaces of two bolts (composition: head and screw) compress the flange gasket and seal against each other.
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