Dear all,

In trunnion support, shall i considered SIF. If we considered SIF, which type is used like reinforced or reinforced or welding etc,. plz confirm.

My client says, above 36" and larger, the SIF of the branch pipe shall be input at the node of the non-rigid element.

Check out the 'Search'facility. There have been loads of posts on this subject and similar.

normaly SIF for large pipe sizes in trunion shall be checked in FE but a thumb rule says to keep it 2.1.

If the trunnion is considerably smaller OD than the pipe, the relevant 's.i.f' can be more than 5 when checked with FE. The Kellogg equation is a rough and ready check of trunnion stresses and if nothing more, compares the subject to thousands of successful installations out in the field, which were designed the same way.