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Research on the Reliability of Compensator

Author: Huatai Hydraulic Source: creapax.com Posted: 2011-5-4 Views: Baidu
The reliability of the compensator is composed of design, manufacturing, installation and operation management. Reliability should also come from these parties
Consideration. Material selection For the selection of corrugated pipes used in heating pipe networks, in addition to the working medium, working temperature and external environment, the possibility of stress corrosion, the influence of water treatment agents and pipe cleaning agents on materials, etc. Based on this, combining the welding, forming of the bellows material and the performance-price ratio of the material, an economical and practical bellows production material is preferred.
In general, the materials selected for bellows should meet the following conditions:
(1) High elastic limit, tensile strength and fatigue strength ensure normal operation of the bellows.
(2) Good plasticity, which is convenient for processing and forming of corrugated pipes, and can be obtained through subsequent processing processes (cold work hardening, heat treatment, etc.)
Hardness and strength.
(3) Good corrosion resistance to meet the requirements of bellows working in different environments.
(4) Good welding performance, meeting the welding process requirements of the bellows during the manufacturing process.
For a thermal pipe network laid in a trench, when the compensator is located on a low-lying pipeline, rainwater or accidental sewage will soak the corrugated pipe, and you should consider choosing
Materials with better corrosion resistance, such as iron-nickel alloys, high-nickel alloys, etc. Due to the high price of such materials, when manufacturing bellows, you can consider adding a layer of corrosion-resistant alloy only on the surface in contact with the corrosive medium.
The fatigue life design can be seen from the failure type and cause analysis of the bellows compensator. The plane stability, circumferential stability and corrosion resistance of the bellows
Corrosion performance is related to its displacement, that is, fatigue life. Too low fatigue life will cause the stability and corrosion resistance of the metal bellows to decrease.
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