"Shell-side / Channel-side Vacuum Pressures
Enter positive values. For example, for full atmospheric vacuum condition enter a value of 15.0 psig. If no value is entered, then 0 psi is used."
I would be looking at the Output closely because noone knows what PV Elite sometime does behind the...
What do you mean by:
"I understand that of course tubes of the bundle always verify" ?
Do you mean that tubes will always pass internal/external pressure calculations?
In my experience, this might not always be the case.
We have repaired old refinery exchangers, where the existing tube...
In PV Elite you have the option to subject flanges to external loads.
UG-44 b)
Design both the small and large flanges of the channel by adding the maximum Axial load and Equivalent Bending moment in the Torque; Loads; Partition Gasket Information module.
This will allow PV Elite to transform...
I cannot comment on the procedure, but one piece of advise would be to check if the maximum allowable external pressure of the tubes is greater than the shellside maximum test pressure.
I've seen many cases where this has been unaccounted for and exceeded.
Does your bundle have runner/sliding bars?
Are they setup in the baffles correctly? Usually they are setup proud of the baffle edge by 1.5 mm.
Did you check it for twisting before insertion? Because this might have happened during initial assembly too.
Otherwise you might have something in the...
Some plants require these to be plugged with high temperature grease, or if there is insulation, these holes can be threaded and tell tale tubes (1/4" NB or similar) be fitted protruding beyond/outside the insulation.
Check what your plant/client preference normally is.
I think you might be able to find your answer in ASME VIII-1 UG-152:
"(f) The relieving capacity of a pressure relief device for compressible fluids may be prorated at any relieving pressure greater than 1.10p"
Without being an expert in the field and briefly reading between the lines, my...
You make the template to match your skirt base, then you send it to the guys on site to prepare the concrete and predrill in the positions and install the anchors in place before the reactor arrives.
Make sure you match the exact orientations for any deviations during reactor manufacture.
There is no problem to use either fillet only or groove plus fillet weld provided that the strength requirements of the joint are fullfilled.
The groove + fillet might be preferred because it's normally a two weld run process - root weld run + cap weld run, where the start/stop positions of the...
Just do a LAP Joint flange design if allowed. Then no PWHT would be required. (Do not weld the Inconel to the C/ST whatsoever).
You can weld the lap to neck followed by a face skim, something like this:
https://ibb.co/WDx8Sts
By the way, if your design code is PD5500 -> the lap must be...
9-10mm is really too thin for such a large diameter blind.
The force across your blind will be at least: The area within the 900mm ID multiplied by your pressure or:
Force [Newtons] = (900mm/2)^2 x Pi x P (where P is your pressure)
Since you're working in SI units, it's best to convert your...
Have a look at EEMUA Publication 143
https://www.eemua.org/products/publications/digital/eemua-publication-143
https://www.eemua.org/news/identifying-the-appropriate-techniques-for-tube-en
Basically what the code is telling you that you have to investigate the stresses in the shell without considering the metal which has been removed from it.
They call that the NET AREA (Whatever area is left after you drilled your nozzle holes).
Go to the program settings and ask it to apply/resolve the nozzle loads to the supports.
It's in Job Specific Settings and is called "Conzider Nozzle Loads on supports".
Then add your nozzle loads and ensure Thrust loads are considered.
PV Elite will then resolve any nozzle loads as vectors...
Section UCS-66 works only with the ASME materials which are listed in Figure UCS-66 and Table UCS-66.
If you can't find your SA-36 in there (I think you won't be able to find it) - you are looking for trouble.
I suggest you leave this SA-36 alone. Not sure who is giving you such ideas (:
Look...
Christine74, you also have to take into account the cost of NDT to be performed on each nozzle & pad.
Sometimes it might work out cheaper to UT + Dye Pen nozzle to shell using a LWN nozzle, than UT+Dye Pen nozzle to shell, pad to shell, pad to nozzle and X-Ray + Dye pen the pipe to a RFWN flange.
Why not use SA-320 L7 bolting material instead? Cheap, easy to get in variety of diameters and the MDMT is -50 deg C.
https://www.wermac.org/bolts/a193-b7_a320lL7_studs.html
Unless you have a practical reason to use SA-36 which I believe is structural steel - the option above seems better to...
