TGS4,
Perhaps I did not state my opinion correctly. I have used FEA many times, but never if there was a clear example in The Code. Unfortunately, in custom equipment design, there has been many applications where I could not find a relative application in The Code. The bottom line is Sound...
Read U-1(a)(3)... again. I call this the Sound Engineering Practice Disclaimer.
If your FEA dude has done everything right, and I have found that it takes several iterations for them to get everything right, then you should be able to go with the FEA results. However, be aware that if there...
Thanks for responding chicopee.
The attachments I was concerned about are indeed forgings but they are machined for each specific application/attachment. My concern was that it appeared to me that The Code was now specifying that a minimum 1/4" radius was required for all transitions. I...
Ok you pressure vessel experts out there. I have a good one for you.
Section VIII, Div. 1, Figure UW-13.4 shows typical transition details for attaching nozzles to piping of lesser wall thickness. In both sketches, it shows a 1/4" minimum radius at the angle intersections. Is this setting a...
It's good practice to always check your vessel for full vacuum. It is a fairly simple task via Megyesy. In our process plants today you just never know what may happen. Even birds can plug a critical vent! Painters are infamous for taping over pipes and openings.
If you have checked and...
As good engineers, we shouldn't overlook any of these issues. Check bending and shear....the unity check will normally take care of unusual geometry issues. Be sure to look at your lugs as well and don't forget bearing stress.
AISC is a good reference that has acceptable criteria for all of...
The bending moment, worst case, would be M=PL/4. Where
L is the maximum length between the "simple" supports
P is the maximum load in the center.
You can calculate your section modulus as Z=d^3/6. (All units in inches of course.)
Your bending stress (using AISC terms) is fb=M/Z. Y...
Blodgett is the bible when it comes to welding. If you don't have it, you need to get it. Don't let the cheap cost fool you, it is the best value you will ever get for your money. It's cheap because Lincoln subsidizes it. Blodgett covers pretty much anything I have ever seen when it comes to...
I don't know of any formuli or rules so it must be an imperical issue that deals strictly with ease of assembly.
The real question is "why are you concerned about it?" I have always found that if there is a standard, don't deviate from it without rock solid justification. If you...
Our practice has always been that the vessel includes everything up to the first flange or fitting....which agrees exactly with what JTE is saying. Another way you can look at this is "how can you do a hydro test with an open hole?" Obviously you can't, so either a plug must be...
