FUNCTION OF EXPANSION JOINTS
Why do we require an Expansion Joint ?
Any pipe connecting two points is subjected to numerous types of forces, which result in stresses on its wall.
Let us consider the stress due to the movement and thermal expansion. The stress on the wall of the piping is related to the force or movement exerted on it by external restraints.When either the values of the stresses or the values of the external forces or moments exceed the maximum allowable values, the flexibility of the pipe must be increased artificially.This can be done either by altering the layout of the pipe or by inserting high flexibility section into it.