Reliable research on compensator

The reliability of the compensator is composed of multiple links such as design, manufacture, installation and operation management. Reliability should also be considered from these aspects. Material selection For the selection of corrugated pipes used in the heating pipe network, 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. should also be considered. On this basis, combined with the welding and forming of the bellows material and the performance-price ratio of the material, an economical and practical material for making the bellows is selected.

In general, the material used for bellows should meet the following conditions:

(1) High elastic limit, tensile strength and fatigue strength to ensure the normal operation of the bellows.

(2) Good plasticity, which is convenient for the processing and forming of bellows, and can be obtained by subsequent treatment processes (cold work hardening, heat treatment, etc.)

hardness and strength.

(3) Good corrosion resistance to meet the working requirements of bellows in different environments.

(4) Good welding performance, meeting the welding process requirements of the bellows in the production process.

For the thermal pipe network laid in the trench, when the compensator is located in a low terrain, the bellows will be soaked by rainwater or accidental sewage, and materials with stronger corrosion resistance should be considered, such as iron-nickel alloys, high-nickel alloys, etc. Due to the high price of such materials, when manufacturing bellows, it can be considered to only add a layer of corrosion-resistant alloy to the surface in contact with the corrosive medium.