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...
I've just found a supplier which will state into certificate the dual standard (EN+ASME), and also without additional costs.
Now I'm in contact with Third Part to understand if he will accept this.
IMO,considering also green light from calculation, unless Notified Body's word, I hope there...
Mmm but EN 1759 is an european standard, isn't it? I'm not mixing anything because flange is according to an EN standard (and ALSO acc. to ASME B16.5, but in certificate EN will be stated).
Ok, I understand your point.
In EN 13445 seems that EN 1759 is not mentioned, but EN 13445-3 par. 11.4.2. says:
11.4.2 Use of standard flanges without calculation
Flanges that conform to an European Standard for pipework flanges may be used as pressure vessel components
without any...
I haven't talked to third body yet, the only thing that I know is that if in the software I select that flange according to EN 1759 (which has the same dimension as per B16.5, i checked), calcs are ok and software doesn't output error or warning anymore. Stop.
So it seems that this solution is...
Hi,
I have to design a vessel according to EN 13445+PED; previously this vessel was designed according to ASME VIII DIV.1.
I have to use ASTM material + PMA.
Vessel is in stainless steel material and is very simple, a shell from plate with 2 elliptical heads at the ends with some nozzles and...
My client could also put an additional gasket below one of the external saddle in order to correct slope of flange. In this case vessel would be slightly inclined from the vertical, but if the lower connection is the only one of concern, well I think it could be a solution (considering that the...
