Section 1: Brief Introduction to Pressure Relief Manholes

Large storage tanks may occasionally experience abnormal conditions during operation, such as damage to the internal heater causing a massive injection of hot carriers or encountering external flames leading to overpressure inside the tank. If immediate emergency emptying measures are not taken, tank destruction is inevitable. Therefore, large storage tanks should be equipped with pressure relief manholes or safety emergency relief devices to prevent accidents.

Pressure Relief Manholes are commonly used safety equipment in low-pressure arch roof tanks, and areBreathable valveFor use in conjunction. When the internal material of the tank rises, the internal pressure of the tank roof increases, and it is necessary to vent the tank gas. At this point, the pressure relief manhole operates when the breathing valve fails to meet the discharge requirements or in the event of a tank fire, expelling the gas to achieve internal pressure balance within the tank, thereby ensuring the safety of the tank.