Dear Sir,
This question confuesd me very long time, is it must add gaps in stress model according to the pipe support standard???
Normally, the pipe support standard have 2~3mm gap for limit and guide, for easy installation. Someone told me that the gaps in pipe support standard can be ignored in stress model, but someone says no.
With/Without the gap will effect on the equipemnt nozzle load and support load.

Members/admin, can anyone reply. looking for urgent response.

Thanks

As a personal opinion, you would not consider a standard gap of 2 mm because you are not sure it is in place after erection. Ignoring it makes your calculation reasonably conservative and protect you against possible software non-convergence issues.

You have to include a gap of 15 mm, clearly indicated on isometrics to be in place after piping erection.

Finally you remain responsible about the decision to include or not the standards gaps; it is not a matter to be right or wrong but you should think on the credibility of the calculation of a critical system saved by standard gaps.

Hi Mariog, thank you for the reply!

Regards

My current job, applying 2mm gaps on guide increases loads at Pump nozzle, and it exceeds allowable moments. So I requested pump vendor to increase allowable even loads were under allowables after omitted gaps on guides. Because we don't know how the supports will be installed.