Maximum Allowable Working Pressure
(MAWP)
The maximum allowable working
pressure is the maximum continuous pressure for which Ariel has designed
the cylinder when handling the specified fluid at the maximum temperature.
Relief valves shall be provided and set to operate at no more than the
Maximum Allowable Working Pressure. The MAWP is based upon the minimum
of the following considerations:
- Burst
test pressure (adjusted by a safety factor which is dependent on cylinder
body material)
- Allowable
bolt loading
- Flange
rating
- Alternate
cylinder bolting (17-4PH bolting). Current
cylinder MAWP are not reduced in most cases when "Sour
Gas" bolting is used. The NACE MAWP are listed in the DataBook
for the exceptions (17-7/8K:T:C:D:Z:U Class cylinders).
Caution: The Ariel DataBook lists only
current MAWP ratings. Many cylinders have been uprated over time. Always
check the cylinder nameplate for the MAWP when calculating compressor
performance for existing equipment.
Ariel
Corporation Application Manual
12-May-2003