Preventing electrostatic hazards in transfer fuel tanks requires targeted measures to control static generation, ensure effective static dissipation, and avoid conditions that could trigger ignition—all to mitigate the risk of sparks that may ignite fuel vapors.
Control Static Generation
- Optimize material selection by choosing tank materials with conductive properties (certain grades of steel or conductive polymers)
- Avoid non-conductive materials that trap static charges
- Minimize fuel flow velocity during transfer to reduce friction
- Use wide-diameter hoses and ensure a steady, gentle flow
- Avoid rapid or turbulent fuel movement that increases static buildup
Ensure Reliable Static Dissipation
- Properly ground the transfer fuel tank to provide a path for static charges to safely discharge
- Use dedicated grounding cables with secure clamps
- Attach to clean, unpainted parts of the tank (avoid rusted or coated surfaces)
- Bond all components together in multi-part systems to maintain equal electrical potential
- Regularly inspect grounding and bonding equipment for wear or damage
Avoid Ignition Sources
- Keep open flames, hot surfaces, and electrical devices away from the tank
- Ensure the tank's vent systems are functioning properly to release fuel vapors
- Use non-sparking tools made from brass or non-ferrous alloys
- Prevent sparks that could ignite fuel vapors even if static charges are present
Implement Operational Best Practices
- Train operators to recognize static hazard risks and follow proper procedures
- Ground the tank before starting transfer
- Avoid sudden stops or starts that disrupt fuel flow
- Avoid transferring fuel in dry, low-humidity environments
- Maintain moderate humidity levels to help control charge buildup