Flammable Liquid Transfer Pump
A flammable liquid transfer pump is a device designed to move flammable liquids between containers or tanks, requiring compliance with ignition-risk controls such as bonding, grounding, and pressure management. It must be suitable for the liquid's flash point and operating pressure, with recognized listings from agencies like UL or FM ensuring adherence to good engineering practice for safe shop floor use.
On a manufacturing or shop floor, flammable liquid transfer pumps are selected for specific products and installed with compatible hoses and fittings to prevent static discharge and overpressure. Conductive containers must be bonded or grounded during transfer to control static ignition risks. For positive displacement pumps, pressure relief is required on the discharge side, and quick-closing valves are prohibited. Emergency shut-offs and fire extinguishers (e.g., 80-B:C) must be accessible. The pump must be rated for flammable service, not a modified generic pump, and the system must withstand maximum working pressure.
- Using a non-rated pump or modified water pump not designed for flammable liquids, creating ignition and compatibility hazards.
- Failing to bond conductive containers or ground the system during transfer, allowing static discharge to ignite vapors.
- Installing a positive displacement pump without proper pressure relief or using a quick-closing discharge valve, risking rupture or line failure.
What is the core hazard a flammable liquid transfer pump must control?
Ignition of flammable vapors from static electricity, hot surfaces, sparks, or pressure-related mechanical failure, requiring grounding/bonding and pressure control.
Does WorkSafeBC regulate the pump as a standalone device?
No, WorkSafeBC focuses on the full transfer arrangement, ensuring the pump, fittings, and practice meet good engineering practice and OHS requirements.
When is bonding or grounding required?
When transferring a combustible liquid normally used as fuel, a flammable liquid, or a flammable gas between metallic or conductive containers, they must be bonded or grounded during transfer.