How to refuel a Self Bunded Diesel Fuel Storage Tank

1Prepare Equipment and Inspect Safety Conditions

Gather necessary equipment including approved fuel transfer hoses, grounding cables, and spill containment kits.
Inspect the tank's fill port for debris or damage, ensuring the cap and seals are intact.
Check the refueling truck or supply line for leaks, verifying that all valves are in the closed position.
Confirm the tank's current fuel level using the monitoring system to avoid overfilling.
Ensure the area is well-ventilated, free of ignition sources like open flames or sparks.
Post warning signs to restrict unauthorized access.

Connect a grounding cable from the storage tank's grounding lug to a dedicated earth ground point.
Attach a second cable to bond the storage tank and the refueling vehicle or supply source.
Verify that connections are secure and free of corrosion.
Ensure electrical continuity between all components.

Align the refueling hose with the tank's fill port, using compatible fittings to ensure a tight seal.
Avoid forcing connections, which could damage threads or cause leaks.
If using a pump system, ensure it is rated for diesel fuel and properly primed.
Open the tank's fill valve partially to allow air venting during initial connection.
Confirm that all auxiliary valves in the transfer line are closed before proceeding.

Open the supply valve on the refueling source gradually, allowing fuel to flow at a controlled rate.
Monitor the flow rate and tank level in real-time using the tank's level gauge.
Keep a constant visual check on all connections for signs of leakage.
Avoid leaving the refueling operation unattended.

As the tank approaches its recommended fill capacity (typically 90%), reduce the flow rate.
Close the supply valve when the desired level is reached, then close the tank's fill valve.
Allow residual fuel in the hose to drain back into the supply source before disconnecting.
Open vent valves temporarily to equalize pressure inside the tank.

Remove the grounding and bonding cables in reverse order of connection.
Securely cap the tank's fill port and stow the transfer hose properly.
Inspect the fill area for any spilled fuel, using absorbent materials to clean up.
Record the refueling volume, date, and time in the tank's maintenance log.
Perform a final check of all valves to ensure they are closed and sealed.