PRESSURE/VACUUM VENTS

EXPLANATION

Pressure and /or Vacuum Vents are used for the normal venting requirements. Normal venting is defined as venting required because of operational requirements (i.e.filling and emptying the tank) or atmospheric changes.

Emergency Relief Vents are used to meet venting required when an abnormal condition, such as an external fi re or such as ruptured internal heating coils, exist either outside or inside the tank.

All of these devices are sized in accordance with API Standard 2000. Improperly specified relief vents may result in structural damage to the tank or system and can cause severe personal injury or death.