Expansion Joint
Expansion Joint
(OP)
Hello.
I just want to ask regarding the stress analysis for a single expansion joint (without the tie rod). Is it always required to provide anchor support near the single expansion joint (without the tie rod)?
Thank you in advance.
regards,
marchie
I just want to ask regarding the stress analysis for a single expansion joint (without the tie rod). Is it always required to provide anchor support near the single expansion joint (without the tie rod)?
Thank you in advance.
regards,
marchie





RE: Expansion Joint
You need to give us much more here to work with - a drawing / sketch, isometric, size, movement, why you think it doesn't need one, why you're putting an expansion joint in in the first place etc
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Expansion Joint
RE: Expansion Joint
Additionally, I cross-checked the latest isometric versus the as-built/site condition, there is no anchor near the 3rd EJ (except the pump nozzle).
I just want to clarify for the need of an anchor near the single EJ, Is it really needed? If yes, why the as-built doesn't have anchor and yet the line is still operating?
FYI: Temperature : (Ope) 50C & (Design) 90C
Pressure : (Ope) 6.5 bar & (Design) 10bar
Line size: 60" (reducer 66"x 60")
Maximum Displacement in the 3rd EJ = approx. 2300 mm (if no tie/hinge)
Maximum Displacement in the elbow = approx. 150 mm (if no tie/hinge)
The displacement above is very large.
Thank you in advance.
Regards,
marchie
RE: Expansion Joint
IMO, the support is needed next to the EJ which is designed for the movement but not the weight support. Per attache stress iso, are the nodes #54 and #90 for the pipe supports adjacent to the EJ's?
RE: Expansion Joint
Node 54 has no other purpose and removed after my final report while node 90 is an immediate spool after 3rd EJ that is connected to the reducer.
RE: Expansion Joint
RE: Expansion Joint
But, is that plate sliding on something fixed but with no resistance, welded or bolted firmly to something fixed (like an anchor), or is the 12 mm plate merely assumed to be sliding around on a "perfect surface" until rust and crud freeze it solid?
RE: Expansion Joint
The dummy you are talking about is sliding/not fixed. I already checked it in the site.
RE: Expansion Joint
http://www.spiroflex.hr/restrained-expansion-joint...