I work as mech eng on a oil refinery so quite often get involved with piping expansion joints.
As a general rule we consider expansion joint as a last resort as due to there construction they are a weak point in the piping system (they are thin and vulnerable) other disadvantages are cost and...
We have a tank in which we have a large paddle and are suffering repeated failures of the shear pin which is fitted in the drive coupling.
What I am attempting to calculate is the Torque at which the shear pin is failing but I do not have a yield shear stress value to use in the shear...
I have successful experience of using nylon tube inserts in a sour water (water containing H2S)heat exchanger.
These were supplied by a UK company called Corrocoat Ltd. Contact was Simon Conroy tel 01132760760, website www.corrocoat.com
They come in all standard tube sizes/gauges and are...
