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which one is stringent design condition?

which one is stringent design condition?

which one is stringent design condition?

(OP)
How can we check whick one is stringent design condition(design pressure and design temperature given) without designing a vessel for a sa 516 gr 60 material.
3 conditions are
1) 3.8 kg/cm2 @ 350 deg c
2) 0.7 kg / cm2 @ 395 deg c
3) 5.8 kg/cm2 @ 190 deg c

RE: which one is stringent design condition?

define stringent. is fabrication cost the most stringent? is mass the most stringent?
without having the slightest idea of the vessel size, shape, volume, and other key info, there's no way any one here would be able top provide you a correct answer.
your question is too vague.

I suggest you answer your own question. what you could do is pick a design code (if you're free to pick one), or apply the contractual code, and dos some basic calculations for wall thickness in the shell and head, work out a costing sheet, and come up with an answer.

RE: which one is stringent design condition?

I think
5.8 kg/cm2 @ 395 deg c







RE: which one is stringent design condition?

You mean steam-out cond.
regeneration and process conditions?
Calculte them all three, then you see what is the most "stringent"

RE: which one is stringent design condition?

If you design a vessel to the ASME Section VIII Codes, then the answer is that you need to verify all three, and all three can be indicated as design conditions.

RE: which one is stringent design condition?

This is a SAT question.
Assuming the vessel is just an ordinary one, the term "stringent" normally means thicker plate for pressure and temp, and normally will cost more by more material and welding.
So, thickness = stringent factor= proportional to factor of (design pressure/allowable stress).

RE: which one is stringent design condition?

jtseng123, you're right. It was a simple question that wouldn't require high tech over-engineering. In any code you select the allowable (or calculate the allowable) for the given temp and pressure, simply considering all the other variables constant for the current case. That will give a certain set of 3 thicknesses. Which is the most stringent? The highest thickness. Simple. Is it?

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