Hello,

Regarding applicalbe code for GRP pipie design and stress analysis, I ordered vendor to apply below code.

- Design Code : ASTM and AWWA C950
- Stress Analysis : ISO 14692

Then, some vendors stated that pipes design required as per AWWA shall be ASME B31.3 for stress anaylsis not ISO 14692. It is not possible to make stress analysis according to ISO 14692 if pipes are not design according to ISO 14692.

Is it true? I thought the stress analysis for GRP pipe is always applied to ISO 14692 regardless of design code.

Please advise.