Simple: I input dimensions in my software, I guess a weld dimension, then if software whines I change weld dimensions until it works! :-)
I've read that set-in can manage higher stresses than set-on...so is this not related to SIF?
mmm I don't understand where you can see the difference between insert and not. This note refers to figure 1-3 which is very general and not regarding a difference between type of weld but more about "shape" of the joint...
Hello, I've read many threads in this forum about set-in/set-on nozzles and what is the "best" solution for a pressure vessel.
I usually design according ASME VIII Div.1 but this code seems not to suggest a preference for a insert or a set-on configuration as long as you follow figure UW-16...
I don't exactly know, my client told me that upper nozzles are very close to a burner, which means that fluid entering the upper part of vessel would be at high temperature, estimated about 650°C, but 675°C is the worst scenario. I don't think that vessel will be subjected to a thermal fatigue...
Hi,
I'm designing a pressure vessel, O.D.1800mm, height=4500mm, mat. SS316 acc. to EN 13445.
Vessel has 2 shells (upper&lower) which are connected by a body slip on flange made by plate. Lower shell is 2,5m, higher shell 2m.
Shells are welded to 2 elliptical heads (at bottom and at top) with...
Hi,
would like to know thermal calculation for a thermal oil heater like this one:
https://www.abco.dk/English/CustomisedBoiler/ThermalOilHeater/
Is there a simplified method to calculate the surface temperature of the outside wall of the coil? What parameters are necessary to know? Flame...
mmm in points 3) and 4) there's something that I'm missing...you're talking about horizontal loads, but in this case there's only one vertical force, as in picture.
I don't understand what are the others horizontal forces.
In 3) you describe 2 cases which I think they would be correct if force...
Good points. A few questions:
1) It seems that there are 2 bending moments in 2 different planes, so may I use this formula to find total S and compare with allowable compressive stress?
S = -W/A +/- Mxx/Zxx +/- Mzz/Zzz
2) What is the unsupported length of colum in this case? Total height of...
ok thanks I'll take a look!
only weight of vessel actually (Force=weight of entire vessel and accessories approx).
It's a pro forma calculation, in order only to give a semblance of design check of something which was created from old construction standard belonged to some (unknown) company...
Hi, I'm trying to understand what kind of design check I've to do for a saddle of a pre-existing pressure vessel here below sketch shown:
Saddle is bolted to the ground/structure through 4 bolts. The only force to consider is there shown (weight included).
I suppose that base plate undergoes...
Hi,
a friend of mine, who works in a workshop, is asking me if he can do something for this issue.
He is building a pressure vessel acc.to EN 13445, Gr.1.2 (c.steel).
This vessel has a shell with a nozzle bended from plate; this nozzle is welded to the vessel with a set-in weld and has a...
thread292-481216
Hi, I've a similar question of thread below.
In this case I have 2 different spheres mat.316, 30 and 35mm, whose starting disks (cut from plate) will be hot formed and then solution annealed with PFHT.
In the first one mill certificate, base material was solution annealed at...
Thank you for your answer, so if the thickness of RF would increase more and more, at some point stud bolts could highly plasticize/break, right?
I don't understand why ASME or calculation softwares themselves do not include this case. I've seen many raised face with various dimensions...
More...
I've already run appendix 2 calculation with a pressure vessel software and new geometry seems not possible to be integrated...what kind of calculation should I do?
Hi,
suppose that you have a flange in contact with its identical counterflange, both special WN raised faced with RF thickness=2mm. Suppose also a spiralwounded gasket between the two.
This configuration could be easily designed using ASME VIII Div.1 appendix 2.
Now suppose, keeping the other...
Nope, it's not a classic RTJ acc.to B16.5.
Please notice that the internal part after the "groove" is higher than the finishing surface of flange (you can see clearly in the sketch).
I think it's more similar to EN 1092-1 TYPE H here below:
but also in this case dimensions don't match with...
Hi,
one of my clients wants to rebuild a small pipeline of a old project ('80 years), which consists of a tube from rolled plate and welded at the both ends 2 flanges as sketch below:
These flanges are welding neck and they also have a small strange cave for O-Ring gasket, as you can see...
