In Casear II Ver 4.3, we do not have facility to compute SIF for brach type "Sockolet". Weldolet has "BW" connection at branch end whereas Sockolet has "SW" connection. However, the Olet which is sitting on the header pipe has same configuration. Hence shall I consider "Sockolet" as same as "Weldolet" as far as branch type is defined, as we intend to calculate SIF for the branch. Could anybody support this logic?

Mr. Thiagarajan :
Weldolet is defined in the code terminology as "Branch welded on" fitting and Sweepolet as "branch welded in ". However there is no reference to a sockolet, but SIf is prescribed for a Socket weld.

In my opinion it can be done like this:

At the junction point define a weldolet and at the end of the weldolet define a SW connection.This will simulate the effect of a sockolet.

Regards

Anindya Bhattacharya

Stress analyst

Bechtel Corporation

Mr Thiagarajan ,

In my opinion, model a rigid element of length equal to the radius of the header pipe from centre line of Header and define SIF corresponding to "Welding Tee" at centre line of Header. Then define SIF corresponding to "Weldolet" connection at the other end of the rigid element.

If your piping system is to B31.3 then the answer to your question is in Appendix D.

Header pipe sif should be as per "branch weld on fitting", but the branch pipe sif should come from the bottom section of table D-300 than then refers you to note 14.

All above information of Modelling of Sockolet is interesting, but I am expecting some answer also from Moderator of this forum.

I have a case of main line as 3" and tapping taken of 2". To follow procedures as describe above would be difficult in this case where 1/2 OD of main line is very less.

Richard,

Please advise on sockolet modeling. Should we define weldolet @ header/branch junction and socket at the end of sockolet or should we just define socket at the center of header/branch intersection in caesar II?

You may find some guidance in the thread http://forums.coade.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=68106