pressurized hardware designed primarily for the storage of pressurized fluid with an energy level greater than or equal to 19310 Joules, or with a pressure greater than or equal to 0,69 MPa, or which can create a hazard if released
NOTE E.g. the stored energy can be calculated by the formula for the reversible adiabatic (isentropic) expansion of the confined gas:
E is the stored energy
P1 is the internal pressure
P2 is the external pressure
V is the pressurized volume
g is the ratio of specific heat of the gas.