Reliable research on Expansion joint

Compensator reliability is by the design, manufacture, installation and operation and management and other aspects of the composition. Reliability should also be considered from these aspects.

Material Selection For the selection of corrugated pipe for heating pipe network, in addition to considering the working medium, working temperature and the external environment, the possibility of stress corrosion should also be considered, the impact of water treatment agent and pipe cleaning agent on the material, etc.,

Based on this, the corrugated pipe material is welded and formed, and the cost performance of the material is optimized. The economical and practical corrugated pipe material is selected.

Under normal circumstances, the use of corrugated pipe material should meet the following conditions:

  1. high elastic limit, tensile strength and fatigue strength, to ensure the normal work bellows.
  2. good plasticity, easy corrugated pipe processing and shaping, and can be followed by the treatment process (cold hardening, heat treatment, etc.) to get enough hardness and strength.
  3. better corrosion resistance, to meet the bellows in different environments work requirements.
  4. good welding performance, to meet the bellows in the production process of the welding process requirements.

For the laying of the heat pipe network, when the compensator is located in the lower pipelines, rain or accidental sewage will soak corrugated pipe, should consider the use of more corrosion-resistant materials, such as iron-nickel alloy, high-nickel alloy. Due to the high price of such materials, it may be advisable to add a corrosion-resistant alloy only to the surface in contact with the corrosive medium when making the bellows.