How is petrol or diesel pumped up in a filling station using a motor without igniting any fire?

Pumping petrol or diesel at a filling station involves several safety measures and mechanical processes to prevent the risk of fire or explosion. Here are the key points:

Storage and Delivery System

• Petrol and diesel are stored in large underground tanks, typically made of metal or concrete, which are located below the ground level to reduce the risk of fire and explosion15.

Pumping Mechanism

• The fuel is transported from these storage tanks to the dispensers using hydraulic components, such as pumps and motors. These components are designed to handle the fuel safely and efficiently13.

Dispensing Process

• When a vehicle is being refueled, the attendant selects the appropriate fuel type and enters the requested amount on the digital display. The pump is activated, and fuel flows through the nozzle into the vehicle's tank. The system is designed to prevent sparks and ensure that the fuel flow is controlled and measured accurately1.

Safety Measures

• To prevent fires, it is crucial to shut off the engine of the vehicle being refueled. Leaving the engine running can generate sparks from the alternator or other electrical components, which can ignite fuel vapors. Many stations have signs and regulations requiring engines to be turned off during refueling4.

Grounding and Static Electricity

• Static electricity is another potential hazard. To mitigate this, it is recommended to ground oneself to the vehicle before touching the fuel nozzle to prevent static electricity from causing a spark4.

Ventilation and Monitoring

• Modern filling stations often have ventilation systems and monitoring devices to detect any fuel leaks or changes in pressure that could indicate a potential hazard. For example, CNG dispensing units have multiple attendants to monitor the gauges and ensure safety around the dispensing unit1.

By combining these safety measures and using properly designed and maintained equipment, the risk of fire or explosion during the refueling process is significantly minimized.