Definition(s)
Accumulation
Pressure increase over the maximum allowable working pressure (MAWP) of the vessel during discharge through the pressure-relief device.
- NOTE Accumulation is expressed in units of pressure or as a percentage of MAWP or design pressure. Maximum allowable accumulations are established by pressure design codes for emergency operating and fire contingencies.
Source:API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Accumulation
Pressure increase over the maximum allowable working pressure or design pressure of the vessel allowed during discharge through the pressure-relief device.
- NOTE Accumulation is expressed in units of pressure or as a percentage of MAWP or design pressure. Maximum allowable accumulations are established by pressure-design codes for emergency operating and fire contingencies.
Source: API STD 2000, Venting Atmospheric and Low-pressure Storage Tanks, Sixth Edition, November 2009. Global Standards