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The compensation and pressure of bellows compensator should be within the range

Time: 03-31 󰃯 Reading times: 611 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: The bellows compensator can compensate the axial offset caused by thermal expansion and cold contraction. It should be known whether the amount of pre tension and compensation required for each pipe can be reduced in normal operation

corrugated pipe Compensator The axial expansion of the pipe is compensated by the cold expansion. According to the compensation amount of each wave and the compensation amount required for the normal operation of all pipelines, it can be understood that Bellows compensator In the case of production and manufacturing, it is necessary to pre shrink or pre stretch. When installing bellows compensator, effective pre stretching or pre shrinking should be carried out for bellows compensator according to the difference of working temperature and operating temperature at that time, so that the bellows compensator can be in a very good design state under normal working conditions and ensure good characteristics. In addition, it is also an effective method to reduce the deformation elastic force of bellows compensator.
Generally, when heating, the pipe will be stretched due to heat expansion and cold contraction, so as to reduce the bellows compensator, so as to meet the compression. It can be stretched ahead of time, but there is a limit that too much can not cause the pipe to run normally. This time, the number of bellows can be increased by pre stretching the pipe to avoid.
The reliability of bellows compensator can not be considered from one aspect only. Under normal conditions, the reliability of bellows compensator consists of several stages, such as planning, manufacturing, installation and operation management.
In the pipeline network planning, the reliability of bellows compensator should be considered from these aspects. At the beginning, the selection of materials should be based on the selection of materials. Besides the working medium, working temperature and external environment, the possibility of stress corrosion, the harm of water treatment agent and pipeline cleaning agent on the material should also be considered. On this basis, the welding of bellows material should be contacted The economical and practical material for bellows manufacturing is optimized by the function price ratio of joining, forming and data.
In general, the following criteria should be considered when using bellows compensator: 1) good plasticity, which is conducive to the processing and forming of bellows, and the satisfactory strength and compressive strength can be obtained through the subsequent treatment technology (cold work hardening, heat treatment, etc.). 2) High elastic tensile strength and fatigue strength ensure the normal operation of bellows. 3) Good welding effect, satisfying the welding technical requirements of bellows in the whole process of production and manufacturing. 4) Good anti-corrosion effect, satisfied with bellows in different environment operation requirements. Most manufacturers choose austenitic stainless steel. In order to develop the corrosion resistance of corrugated pipe, the material of corrugated pipe in heating pipe network is 316 or 316L.