4 hinged expansion joints
4 hinged expansion joints
(OP)
I have a question for experts in pipeline and expansion joint design.
We have a pipeline like this (carbon steel, 350°C) and our supplier gave us this layout.
I've never seen 4 hinged EJs in this configuration, it has 1 degree of freedom!!!
So what do you think about it?
We have a pipeline like this (carbon steel, 350°C) and our supplier gave us this layout.
I've never seen 4 hinged EJs in this configuration, it has 1 degree of freedom!!!
So what do you think about it?





RE: 4 hinged expansion joints
A piping system is normally analysed as a structure. Due to the number of degrees of freedom (and it's not 1 !!), this is a mechanism.
RE: 4 hinged expansion joints
RE: 4 hinged expansion joints
It is a mechanism. Piping systems are normally structures.
The arrangement as shown has no control over the position it may adopt. EJ's have specific rotational limits, beyond which, failure can be guaranteed.
Did you want a discussion about semantics or perhaps some useful comments aimed at avoiding a catastrophic failure ?
RE: 4 hinged expansion joints
What are the two dimensions from each "Anchor" to the Elbow (Change in direction)?
prognosis: Lead or Lag
RE: 4 hinged expansion joints
Pipeline: DN250
Dimensions: about 3mx10m (I'm not involved in thi work, so I don't know exactly)