EXPANSION JOINTS

axial

universal

hinghed

gimbal

lateral

spheric lateral

pressure balanaced axial

pressure balanced universal

Axial expansion joints   
(calculations of the thrusts)

The axial expansion joints, composed of one or more bellows, are planned and built, to absorb the axial movements. 
They always are installed among two fixed points, regulated so that they can bear the thrust due to the inside pressure.

For a correct installation it is necessary to presetting the joint, calculating the length to the assemblage, as follows:

were :

Sp	thrust
Am	medium area
Pe	pressure
L	length
Tmax	maximum working temperature
Tmin	minimum working temperature
Tm	mounting temperature
	expansion of the pipeline between Tmin and Tmax
Ce	extension travel
Cc	compression travel

Axial expansion joints installation schemes