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Installation of stainless steel corrugated compensator joint of Luoying pipeline

Time: 03-30 󰃯 Reading times: 851 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: Bellows compensator is composed of metal bellows and prefabricated components, or the components with compensation function in the connection between equipment and equipment in the thermal pipe network. It can compensate the radial expansion and angle change of pipeline caused by temperature difference

corrugated pipe Compensator The driving force composed of metal bellows and prefabricated components or the components with compensation function in the connection between equipment and equipment in thermal pipe network can compensate thermal deformation and mechanical equipment deformation caused by radial expansion and angle change of pipeline caused by temperature difference, and absorb various kinds of damping vibration, so as to reduce pipeline deformation and ground stress and develop pipeline The effect of using time. The high geostress of the bellows is caused by the overpressure of the gas.
It is composed of bellows (a kind of elastic element) and notes such as end pipe, support frame, flange and hose. It can compensate the thermal excursion of pipeline, the deformation of mechanical equipment and absorb all kinds of damping vibration. It can reduce the in-situ stress of pipeline deformation and improve the service life of pipeline. Corrugated compensator The interface mode is divided into looper flange and welding. Directly buried pipeline compensator generally adopts welding method (except for pipe trench installation).
(1) Bellows can be divided into flange type bellows, sleeve bellows, rotary bellows, square natural bellows, etc. among them, bellows are more commonly used. The key is to ensure the safe operation of pipelines, with the following functions:
1. Compensate the radial, transverse and angular thermal deformation of absorption pipe.
Easy installation and installation of expansion valve.
3. Absorb equipment vibration and reduce the harm of equipment vibration to pipeline.
4. Absorbing the deformation of pipeline caused by earthquake and ground subsidence.
(2) Stainless steel corrugated compensator installation details:
The production enterprises have a good understanding of Bellows compensator The failure cause analysis shows that the invalidity during the operation period can be divided into two types: erosion leakage and unbalanced deformation, among which the erosion invalidation is the most common. It is found that corrosion failure usually consists of pitting corrosion perforation and stress corrosion cracking, of which chloride ion stress corrosion cracking accounts for about 95% of the total corrosion failure. Therefore, the safety and reliability of bellows expansion joint (compensator) can be further improved by properly selecting corrugated pipe as raw material and structure, effective design scheme, main parameters of wave shape and fatigue life, and ensuring installation quality. In the design scheme, the stability of the compensator should be considered to prevent the unbalance of bellows. The material shows that the compensation of bellows lies in its fatigue life. The higher the fatigue life is, the smaller the single wave compensation is. When the allowable service life of the bellows design scheme is low, not only the meridian comprehensive geostress is higher, but also the circumferential geostress is higher, which makes the bellows part rapidly into the plastic deformation, resulting in the bellows imbalance and invalid.
Corrugated compensator belongs to special pipeline components. It is complicated to install and strict regulations. It needs to measure the pipe resistance and support of support frame. Therefore, it is not allowed to install it without permission. Otherwise, it will cause safety accidents. Therefore, the installation must be provided with detailed pipeline construction drawings and pipe support frame provided by professional design department, and carried out according to the requirements of compensator installation instructions.
1. The pipeline for installing corrugated compensator must be properly guided and fixed in many aspects to make the compensator fully play. Therefore, the setting of the guiding and supporting frame must be carried out in strict accordance with the relevant technical documents of the technical department.
2. The bellows used for bellows compensator is made of thick wall stainless steel plate. Therefore, attention should be paid not to damage the bellows due to knocking, scratch, arc striking and welding spatter during transportation, lifting and welding.
3. Before installation, the foreign matters in bellows and pipes should be eliminated to ensure all normal fitness activities of bellows.
4. The compensator with inflow regulations shall be installed according to the provisions of the inflow arrow symbol.
6. In order to make the bellows in a good working attitude, the deformation of the compensator, including radial, transverse and torsional, can not be used to adjust the installation deviation of the pipeline.
7. Before the operation of the system software, the manufacturer generally does not recommend the removal of the small tie rod, but loosen the inner nut according to the compensation amount after pressing.