Dear all,

Can anyone please tell me why we are not preferring ASME B31.3 for GRP stress analysis to ISO 14692 / UKOOA / BS 7159 codes?

BS7159, UKOOA and ISO 14692 (which is mostly based on UKOOA) are codes specifically written for GRP piping. ASME B31.3 has a part on non-metallic piping, but this is far from complete regarding for example load cases and material strength. And it has a very high factor of safety in comparison with the other codes.
I once had a project where the end user insisted on using B31.3 for GRP piping. What I have done is that I first ran all models using UKOOA and reported this results to my client (contractor) and afterwards ran all models again using B31.3 and reported this again, but now for the end user. That is how much I value the B31.3 code for GRP lines.

Dear Mr. Corne,

Many thanks for your reply. In fact my client requested to do the FRP analysis with B31.3 and I have to convince them to use ISO 14692.

Regards
Nidh

Can we go upto 100% of the allowable stress value during the pipe stress analysis using ISO-14692 code in Caesar???

Regards

Hi guys,

No.

We can not Run it using ASME B31.3 for GRP Pipe. As crone said, you can submit two different result.

Hi,

But as per ISO-14692 code, we are using factored envelope curve for the stress analysis, so I presume we can consider upto 100% of the allowable stress value.

Regards

You can always allow stresses up to 100% of the allowable stress. That is why it is called ALLOWABLE stress. It would be strange if you may only allow 50% of the allowable stress isn't it?

Make sure you correctly enter all stress values and load factors (f2) in CII though.

Hi members

could any one give me ISO-14692 code?
and appreciate his help


Thanks