Trunnion Checks using Kellogg "Choking" method
Trunnion Checks using Kellogg "Choking" method
(OP)
Hi All,
Just wanted to solicit views regarding the use of the "Kellogg" Trunnion check that is used widely. As I see it the method is applicable to "trunnions" which are attached to pipe (or bends) where they are remotely positioned (i.e. straight pipe either side of the trunnion or bend with not fittings such as flanges etc close to the trunnion).
My question is - Can the method "really" be used where the trunnion is located on say a short pipe spool with a flange at either end as this must affect the stress distribution in the pipewall ?
Has anyone considered this situation?
Just wanted to solicit views regarding the use of the "Kellogg" Trunnion check that is used widely. As I see it the method is applicable to "trunnions" which are attached to pipe (or bends) where they are remotely positioned (i.e. straight pipe either side of the trunnion or bend with not fittings such as flanges etc close to the trunnion).
My question is - Can the method "really" be used where the trunnion is located on say a short pipe spool with a flange at either end as this must affect the stress distribution in the pipewall ?
Has anyone considered this situation?





RE: Trunnion Checks using Kellogg "Choking" method
At best the calc should be considered as a rough check, a comparison to endless numbers of similar designs, apparently functioning acceptably in the field. It is by no means a valid stress calculation.
FE-Pipe will do a very quick finite element check and give reliable results for any trunnion.
RE: Trunnion Checks using Kellogg "Choking" method
Just another question. You say FE-Pipe addresses trunnions. I know that Fe-bend can be used for trunnions on bends but where can you check trunnions on straight pipe in FE-pipe?
RE: Trunnion Checks using Kellogg "Choking" method
To build a simple straight pipe trunnion would be quite simple, but would need a sensitivity check on the juncture mesh to ensureyou are not missing anything.
RE: Trunnion Checks using Kellogg "Choking" method
I thought that was the case but I just wanted to check that there was no simplified approach as is the case with FEBend.
Cheers again.