We have a 72" horizontal pipe that we're attaching lugs to. The lugs support the pipe from a trapeze hanger on the ceiling, and are located on the sides of the pipe. PVElite and CodeCalc won't accept lugs on a horizontal vessel.

The lug is a single 7/8" plate with an attachment hole; it's pretty much a lifting lug. In CodeCalc, I couldn't put a pad under a lifting lug, so I just ran the lug by itself. Then, I faked a support lug (with gussets) that I could put a pad under. Load per lug is 3,000 lb. All resulsts seemed OK.

Is there a better way to look at a lifting lug with a pad under it?

Hello Larry

You are quite correct, the lug programme is specifically designed for the support of vertical vessels. Howeve, the analysis is possible.

Using CodeCalc, the lugs can be considered as attachements that produce a circumferential moment in the pipe wall. All that is necessary is to use the WRC107 component analysis, and the stresses induced in the shell can be computed by the programme.

I hope this provides a solution to your problem.