Axial expansion metal bellows should be installed co-axially with the pipes centreline. The purpose of this bellows is to compensate axial movements. With the existence of axial movements desired cyclic life can be achieved. If incase there exist other movements like angular or lateral this will affect the cyclic life of Bellows. Generally there expansion joints are used between straight pipes where movement is parallel to the centreline of pipe line.

Use These Bellows In Following Circumstances

• Movement compensation is in straight line.
• Minute lateral/Angular movement can be adjusted but will affect the cyclic life of the expansion joint.
• Bellows are not designed to absorb rotary movements.
• Due to the line pressure between the piping systems numbers of expansion joints are required.
• The best piping system is the once which is broken between intermediate stages with metal bellows at each stage