...with the units.
On page Procedure 10-6 (page 693), when calculating the Pad Eye Weld, i'm getting strange units.
the formulas are
f4 = Pt * tp * pi * D2 / (2*tp + tl)
w3 = f4 / (0.707*Fs)
where f4 is called unit shear load on pad
Pt is the load on transverse direction
tp is the pad eye...
Thank you for the clarification of the name of the piece in english, thats an exactly it.
@LittleInch
Could you elaborate on why you think this is not a good idea? On Cryogenic vessels all connections are usually welded for two reasons one is that the inner tank is not acessible once fully...
Hi,
Thank you for your replys, Answering some general questions:
Yes it is a pressure vessel, operates at 17 barg, temperature of inner vessel ranges about -140 to -180 degrees celsius. Material of piping and vessel is Austenitic SS. I also agree most bends are to allow expansion/contraction...
Hi
Not trying to reverse engineer this. I actually have all the drawings and full acess to manufacturing site during production. I am trying to have some code reference, as these piping are made that way by 'experience' and the is no documented paper on the company, so I'm trying to evaluate...
Hi,
I was looking at the internal piping of a Liquid Oxygen truck (picture in annex). I noticed these formings and bends of the piping and some questions came to my mind.
(https://files.engineering.com/getfile.aspx?folder=b0aa845c-dbbe-4aff-b4cc-b9a18f9c9785&file=20181009_084626.jpg)
1- What...
...a good method I can use to aproximate the flow values?
I also have another question. I've seen two types of design.
1- Flow is divided into N segments of X thin pipes and then collected into a single output
2 - All the flow passes through the N*X thin pipes
Which one is more desirable and why?
Hi,
Sorry for the long time to reply,
1-I agree with you that excess material thickness would prevent shell from stretching enough, but as you said P is design pressure, shouldn't it be MAWP? Can anyone clarify on that?
2- Seems like a good interval, i agree with you. However I'm still on...
Hi,
I'd like some advice on performing cold stretching for a vessel intended for cryogenic storage (ASME VIII-1 Mand App 44). I will list some items for discussion.
1- Pc (cold stretching pressure) is said to be between 1.5P and 1.6P(inclusive). Do I need to keep this value constant during the...
Hi,
I'm designing a storage vessel for R717 refrigerant.
Usually when I design those I specify normalized carbon steel (usually 516gr70N)and PWHT, and also recommend that if possible the addition of 0.2% of water, all that to avoid stress corrosion cracking.
All vessels I've designed for...
Hi,
I'm studying ASME XII which is very similar in many aspects to ASME VIII-1. During my studies I came up with some questions hope you could provide me some help. There is a picture of the load combinations attached from (1-1.4).
1st. I'll treat the vessel as a beam, so in order to account...
...has an idea why it is equal to QF/8 ? According to my calculations it should be QF/2.
Then again when determining M for offset web, M is now w*l²/6, and the unit for that is Force, not Force*length.
I`m attatching page 181 from 3rd edition.
A is the baseplate length
F is the baseplate...
Hi,
I've been asked by a customer to design an atomspheric tank for process use. The tank is vented to the atmosphere on the top part so it is atmospheric pressure. Only load to be considered than is hydrostatic pressure due to the fluid.
The dimensions are
Diameter 3800 mm
T/T Height 6000 mm...
The way I see is the following
If there is a flow, then there is a pressure difference. At the end of the piping (at the burner) the pressure will be atm, and until it reaches there, there will be a gradient in pressure along the piping.
So depending on the distance from the pressure source...
Hi Compositepro
Yes you guessed correctly, this is a refrigerated unit. Thanks for the reply, makes sense to me now.
Just one more question, just to check, it appears to me that the reference height for my DP gauge will be at the tip of the inverted U (gas trap) inside the tank, hence in...
Hi Guys,
I'm a junior engineer
I need some help understanding some principles on the aplication of a differential pressure gauge to measure liquid level on a CO2 tank. (the tanks operates at 16 - 24 bar for co2 storage). Probably is a very easy question, but I could not figure out myself...
Hi guys, sorry for the late reply,
@TGS4
I really appreciate your advice. Unfortunately I do not have access to these professionals and mentoring at the moment, so I have to go the harder way. I'm studying more about FEA on vessels and getting more familiar with div 2. Hopefully someday I can...
Hi,
Thank you for your replies.
@TGS4
I agree with you. When you say I'd have to do something much further, could you please point me into the right direction? Any inputs or references would be greatly appreciated. (PS: As I said I`m not familiar with the WRC procedures, are they applicable...
Hi,
I need some guidance on assessing some local loads on a torispheric head.
It is a vessel for cryogenic Argon storage, for those who are not familiarized with it, it consists of an stainless steel vessel inside of a carbon steel vessel. The space between the vessels is filled with a powder...
