MAWP and design pressure
MAWP and design pressure
(OP)
I am reading right now the API 520 that I found very interesting...
Well, in this document, they specify a difference between the MAWP and the design pressure;
It is said that "MAWP is normally greater than the design pressure".
Is it the same rule everywhere I go or could it change from company to another one?
Thanks!
Méli





RE: MAWP and design pressure
For example, you have a gathering system that you expect will have 350 psig at the farthest well and you are designing your compression inlet for 100 psig--most people would use ANSI 300 flanges and valves and "standard" pipe (e.g., Sched 40 for 6-inch) for this system (MAWP around 600 psig) to make sure that normal transients don't approach PSV set points on vessels.
David
RE: MAWP and design pressure
MAWP must always be greater than or equal to required design pressure.
Some companies prefer to make them the same (by varying corrosion allowance on vessels), while some don't.
RE: MAWP and design pressure
RE: MAWP and design pressure
Regards
Evolution rather than Revolution!
RE: MAWP and design pressure
"MAWP = Actual Vessel Mechanical Design"
Let us hope that the actual mechanical design always meets the minimum requirement.
RE: MAWP and design pressure
MAWP=
Maximum(Maximum) Allowable Working (Withholding strength capablity) Pressure
Best Regards
Qalander(Chem)