Allowable Nozzle/Termination Point Loads
Allowable Nozzle/Termination Point Loads
(OP)
A customer of mine has asked for the acceptable nozzle/termination point loads for a pump feedback loop system. We provide a pump and a branched connection from the main pipeline they have, and they design the pipe layout to the pump based on the allowables.
It seems that acceptable pump loads are given in API 610 for the pump, but where can I find more information on allowable moments and loads for the branched connection, which I interpret as the "termination point"?
I've been looking at descriptions ofthe WRC 537 standard which looks to have the required information, but it doesn't seem to distinguish between sustained, thermal, and occasional loads. ASME B31.3 has allowable stresses, but not an explicit table of acceptable loads though I'm more inclined to use the latter.
Any thoughts on which way to go, or if there's another standard to look at instead?
Cheers
It seems that acceptable pump loads are given in API 610 for the pump, but where can I find more information on allowable moments and loads for the branched connection, which I interpret as the "termination point"?
I've been looking at descriptions ofthe WRC 537 standard which looks to have the required information, but it doesn't seem to distinguish between sustained, thermal, and occasional loads. ASME B31.3 has allowable stresses, but not an explicit table of acceptable loads though I'm more inclined to use the latter.
Any thoughts on which way to go, or if there's another standard to look at instead?
Cheers





RE: Allowable Nozzle/Termination Point Loads
In my opinion, your modification and new "nozzles" on an existing system requires you to perform a detailed reanalysis of the system.
The new analysis should be of both the original and modified piping system and the evaluation should be against the allowable stresses of the code of record for the system.
You should be careful that the proper SIFs are included at the branch connection
WRC 537/297/107 applies to nozzles on stationary equipment, not to mid piping system tie points.
A sketch might help quite a bit with your problem description.
What type of branch connection was used ???
MJCronin
Sr. Process Engineer
Venture Engineering & Construction
www.VentureEngr.com