For the large vapour line(36"), the support loads for hydrocase becomes significant. Do we really need to consider hydrocase for permanent support design? Or temporary support can be utilised during hydrotest. Maximum operating loads is calculated 10 ton typically, but two times greater for hydrocase. Pipe line runs above ground by 1 or 2 m, so huge concrete file will be necessary. It will be too conservative design.

Please give me your thought?

Thanks