Metal Expansion Joint installation precautions and installation methods

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Aug 12,2021

Metal Expansion Joint installation precautions and installation methods:
1, Metal Expansion Joint is a special pipeline component. The installation is complicated and strict. It needs to calculate the pipeline thrust and the force of the fixed bracket. Therefore, it cannot be installed without authorization, otherwise it will cause an accident. Therefore, the installation requires pipeline construction provided by the staff. The drawing and the detailed configuration of the pipe support shall be carried out according to the requirements of the compensator installation manual.

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2. The Metal Expansion Joint with flow direction requirements should be installed according to the requirements of the medium flow direction arrow.
3. In order to keep the bellows in a good working condition, the deformation of the expansion joint, including axial, lateral, torsion, etc., cannot be used to correct the installation error of the pipe system during installation.
4. Before installation, the bellows and foreign objects in the pipeline should be removed to ensure the normal movement of the bellows.
5. Don't just rely on the model or code when buying, but provide data to the manufacturer, and the manufacturer can design and produce it, so that the service life or quality can be guaranteed.
6. The corrugated pipe used in the Metal Expansion Joint is formed of thin-walled stainless steel plates, so be careful not to damage the corrugated pipe due to knocks, scratches, arc ignition, welding spatter and other reasons during transportation, hoisting and welding.
7. The small tie rod is generally not recommended to be removed by the manufacturer before the system is running, but after the pressing is completed, the inner nut is loosened according to the compensation amount.
8. The pipe where the Metal Expansion Joint is installed needs to be properly guided and fixed to make the expansion joint work, so the guide and fixed brackets are set up.
Bellows are mainly divided into metal (stainless steel, carbon steel) bellows and plastic bellows. Metal bellows are mainly used to compensate pipeline thermal deformation, shock absorption, and absorb pipeline settlement deformation, etc., and are used in petrochemical, instrumentation, chemical, electric power, cement, metallurgical and other industries. Corrugated pipes of other materials such as plastic materials are used in the fields of medium transmission, power threading, machine tools, and home appliances.
The foldable wrinkle sheet is connected to form a tubular elastic sensitive element along the folding and stretching direction. Its open end is fixed, and the sealed end is in a free state, and an auxiliary coil spring or reed is used to increase elasticity. When working, under the action of internal pressure, it stretches along the length of the pipe, causing the movable end to produce a displacement in a certain relationship with the pressure. The movable end drives the pointer to directly indicate the size of the pressure. The manufacturer of Metal Expansion Joint tells you that bellows are often combined with displacement sensors to form a pressure sensor that outputs electricity, and is sometimes used as an isolation element. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. The bellows is suitable for measuring low pressure.

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