Ross Mackay Forum Moderator 94 Posts
Re: Is it necessary to install an expansion joint at pump discharge piping?28 June 2011 at 1:29pm
Expansion joints can be of great benefit in a pumping system when used properly. They are, however, only needed when pipe strain is present. In addition, the correct installation of an expansion joint is also necessary.
It is not simply a matter of bolting them into the pipeline. This merely transfers the strain through the joint and onto the pump casing, which will ultimately cause seal and bearing failure. In order to protect the pump from such problems, it is necessary to independently secure the end of the expansion joint closest to the pump. This allows the expansion joint to absorb the entire strain coming from the pipeline and thus protects the pump.