Seismic design for B31.3 piping. 1

[PipingGB]

For the Safe Shutdown Earthquake we are required to allow deformation but maintain pressure containment. B31.3 does not cover this and ASME III Div 1,appears to not consider piping with a D/t ratio greater than 50. I can't believe this has not been addressed before therefore could someone give advise as to allowables that could be used and or any other code that may be considered applicable.

 

[doct9960]

PipingGB,

For ASME B31.3 piping, refer to paragraphs 301.5.3, 302.3.6 and 321

 

[JohnBreen]

This may provide some insight:

http://www.americanlifelinesalliance.org/pdf/Seismic_Design_and_Retrofit_of_Piping_Systems.pdf