Hi,

I have tried searching but had no luck. I'm sure that many of us have come across this problem before. When you have interface between U/G FRP pipe and A/G steel pipe, what critera for flange leakage calculation do we use? I found in BS 7159 section 10.6 mentions Flanged joints calculation. which seems ok to be used for FRP part.

Does it mean that we need to check for both sides steel flange and FRP flange? (And with different approach, of course FRP will be check by vendor but I would like to know which method they normally refer to.)

Has anyone got this situation before? Have any idea roughly how much different in term of bending moment and axial forces between the two.

Any suggestion will be very appreciated.

regards,

Waranat