pipe support with repad

[howls88]

I am trying to qualify some pipe supports that will require a reinforcing pad (repad) due to the hogh forces acting on the pipes.

We have a structural T support and trunnion support that require a repad. The T supports are sliders and the trunnion support is an anchor.

I need to determine how much larger the repad needs to be than the pipe support connection. How far around the pipe should the repad be wrapped? How far longitudinally along the pipe header should the repad be extended from the support?

Since we are only supporting the pipe and no material is being removed, I don't think the B31.1 method of reinforcing branch connections is applicable.

I am also having problems finding the appropriate way to install the trunnion and repad. 1) Should the repad be welded to the pipe header and the trunnion be welded to the repad. Or, 2) Cut a hole in the repad and weld it to the pipe header. Then the trunnion will be inserted through the hole and welded directly to the pipe header and to the repad.

I have qualified the trunnion anchor using the Megyesy condensed WRC 107 method using the increased thickness of the pipe wall by including the repad thickness.

Please include references with any suggestions you may have so I can back up my qualifications.

Thanks

 

[gr2vessels]

There is a world of information on this topic, previously discussed on this forum. I suggest to use the search on the top of this page, type in the 'trunnion' and then select the 'Search Posts'.
Cheers,
gr2vessels