Hi there,

I'm new in pipe stress analysis and CAESAR software. Is there anyone who could help me to model an elbolet? One end of this elbolet is connected to 4x3" reducer and the other end is connected to 4x2" reducer. Any suggestions, should be really appreciated.

How can you connect an elbolet to a reducer on each end? There's no end left over to weld to the elbow!

Sorry, i couldn't describe my problem clearly. What i mean by elbolet is that it has three ends (like ordinary Tee). One end is connected to the main pipe 4", other two ends is connected to the two reducers, what i mention earlier. I'm familier with elbow and tee connection, but not with this unusual elbolet ( sometimes may be named as Tee-Elbow, i saw this name couple of times). please give me some suggestions.

Hello Mech,

I am sorry but I must admit that I still do not know what you are describing. If is is an "olet" it must me in the Bonney Forge Catalog. You would do us all a great favor if you would find it in the catalog and tell us what page it is on.

Go here:

http://www.bonneyforge.com/

I think I know what he is decribing. I believe he is trying to describe a 4" run pipe connecting to a 4" elbow with a 4"x3" reducer on one end. There is a normal 4"x2" elbowlet on the elbow as we all commonlt understand it.
I reckon the confusion might come from looking at an Isogen drawn Iso. Isogen commonly uses "tee-elbow" as an annotation beside an elbowlet and draws it as an 'T' shaped elbow. If you can imagine an iso elbow with a 'round' corner, with a third line coming out in the elbowlet direction with a reducer shown connected to it to indicate the size reduction at the olet. Perhaps [and just perhaps], Mech might benefit from a stint in a fab shop so he can relate the standard Isogen symbology to real life.

Thank you all and Mr. Kenny describes my situation pretty well.
Can i model my elbolet in the following way:
4" straight pipe ( node 10 to 20) connected to a 4" elbow (node 20 to 30) and a 4x3" reducer ( node 30 to 40). There is third line coming out from the middle of the elbow (suppose the middle node is 25) and connected to another 4x2" reducer (node 25 to 100).
Is it a realistic idea? What will be the other factors i have to consider? Is there any other way to model it?
I read the discussion about 'dummy leg design' with an elbow in this forum and i get my idea from that discussion.
I would appreciate your help.

I'm pretty confused by all of this but just for the record....

An elbolet is simply a weldolet, sockolet or threadolet type of fitting that is curved at the run attachment point so that it fits nicely on the heal of an elbow.

They are used mostly for instrumentation connections. I have seen them used for branch connections but I certainly don't recommend it and recommend to the designer to do something different.

Now it will become a discussion regarding what are the right SIF's to use at all these locations and how should they be applied. But let us enjoy the weekend first.

Hello folks,

hahahaha...the w/e is over...It´s been almost 2 years since the last post...and now I am going thru the same dillema...what SIF´s to use?? weldolet's SIF??

Any idea??

Regards,

We could also discuss what happens to the flexibility of the elbow or possible creep in the weld and the end result...

I have a simple rule: I do not weld anything into an elbow or bend.

I propose a second simple rule. If you post a question here, and don't get a decent answer in two years, try something else the next time you run into the same problem.