PSA 7.5 — Expansion Joints & Bellows: Types, Pressure Thrust, EJMA and Tie Rods
A 24″ process line runs at 10 bar. Ten bar is nothing — it is the pressure in a bicycle shock, a number you would not think twice about. The line is hot and congested, there is no room for a loop, so an untied axial bellows expansion joint goes in, with an anchor each side.
Years later a modification crosses the line. One of those anchors is in the way of a new pipe rack leg. It is a support; supports get moved.
Guess before you read on: with that anchor gone, what is trying to pull the joint…
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