Does anyone have a copy of ASME VIII to hand?
I'm trying to confirm the adequacy of some burst discs fitted to vessels with a design pressure of 0.3 Barg.
API 520 helpfully includes a chart (taken from ASME 8), which shows that the max allowable accumulated pressure for fire exposure is 121% of the design pressure for vessels who's design pressure of 30 psig or above.
I need to find out the max allowable accumulated pressure for fire exposure, when the design pressure is only 0.3 barg. Can anyone help?
Best regards
Ian
|
Max Accumulated Pressure - Fire Case
Started by Guest_Ian_*, Apr 25 2005 02:25 AM
2 replies to this topic
Share this topic:
#1 Guest_Ian_*
Posted 25 April 2005 - 02:25 AM
#2
Posted 25 April 2005 - 03:38 AM
Both sections AR-150 and UG-125 of ASME VIII just mention that for fire relief, pressure shall not rise more than 21% above the maximum allowable working pressure. This while for other reliefs they state that the device shall prevent the pressure from rising more than 10% or 3 psi, whichever is greater, above the MAWP.
Since in your case 21% of the MAWP of 2 psig is only 0.42 psig, I would use 3 psig instead. Reasoning is that in UG-125 it is stated that the base rule is "10% or 3 psi, whichever is greater", but that you are permitted to use 21% for fire case. In your case I would use the base rule.
Note that I am an engineer and not a lawyer...
Since in your case 21% of the MAWP of 2 psig is only 0.42 psig, I would use 3 psig instead. Reasoning is that in UG-125 it is stated that the base rule is "10% or 3 psi, whichever is greater", but that you are permitted to use 21% for fire case. In your case I would use the base rule.
Note that I am an engineer and not a lawyer...
#3
Posted 17 May 2005 - 03:02 PM
Ian,
Typically a tank designed for such a low pressure would not be built to comply with ASME VIII. Build the tank to API Standards 620 or 650. It is not practical to design a large storage tank to withstand even 3 psig, and so they are not built to this standard.
Doug
Typically a tank designed for such a low pressure would not be built to comply with ASME VIII. Build the tank to API Standards 620 or 650. It is not practical to design a large storage tank to withstand even 3 psig, and so they are not built to this standard.
Doug
Similar Topics
Answered
Steam Pressure Requirements For Limpet Batch ReactorStarted by Guest_golegolegole_* , 10 Apr 2024 |
|
|
||
Valves On Low Pressure Steam ServiceStarted by Guest_Ali4269278331_* , 15 Apr 2024 |
|
|
||
Pressure Control Valve Issues For Gsw LinesStarted by Guest_fahadazh_* , 29 Mar 2024 |
|
|
||
Vapor PressureStarted by Guest_Hamza1111_* , 23 Mar 2024 |
|
|
||
Answered
Vacuum Ejector Pressure ControlStarted by Guest_himanshu.ch_* , 19 Mar 2024 |
|
|