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Henan Liwei Industry Co., Ltd:
1. Since 1988, Top 3 manufacturer of stainless steel bellows in China;
2. The Main Drafting Committee of National Standard for Bellows; 
3. Qualified Supplier for Nuclear Power Plant;
4. ISO9001:2008 and ISO14001:2004 Certified.
 
Bellows Expansion Joint is the compensating element for thermal expansion and relative movement in pipelines, containers and machines. They consist of one or more metal bellows, connectors at both ends, and tie rods that depend on the application. They are differentiated according to the three basic types of movement: axial, angular and lateral expansion joints. 
 
Bellows Expansion Joint is elastic vessel that can be compressed when pressure is applied to the outside of the vessel, or extended under vacuum. When the pressure or vacuum is released, the bellows will return to its original shape (provided the material has not been stressed past its yield strength).
 
Features: 

Economical end usage
Providing for lower initial costs in piping & construction work
Applications:

Diesel engine sets
Pipelines
Turbines
Compressors
Blowers
Vacuum pumps
Heat exchangers 
Advantages:

Reduce vibration
Dampen sound transmission
Compensate lateral, torsional & angular movements
Compensate axial movements
Minimal face-to-face dimensions
Lightweight
Low movement forces required
Reduced fatigue factor
Reduced heat loss
Corrosion, erosion resistant
No gaskets