Static electricity may be generated when liquids are dispensed (poured), or when processed (such as filtering/blending/mixing/stirring). The amount of static electricity produced can depend on the type of materials, speed of pouring/stirring etc.
Static can build up over time, and if not eliminated there is a risk of a static discharge, resulting an a spark. As static discharges the spark can result in fire or explosion. As static is normally invisible the charge can build up over time and often goes unnoticed until it is too late….
The use of earth bonding and grounding between equipment is a proven method of minimising the risk of a spark from static discharge.
From a fire safety point of view, grounding and bonding of equipment used for the transfer of flammable liquids and combustible solids/dusts can be briefly explained as follows:
Grounding (sometimes described in the UK as ‘Earthing’)
Typically this means connecting a piece of equipment to earth. Effective Grounding will provide a means for continuously discharging a charged, conductive body to the earth, this prevents the static charge being built up and therefore eliminates the risk of a spark. Our product is here – https://www.firesafetycompliance.co.uk/flammable-liquidsgases/284-anti-static-grounding-wires.html
Bonding is achieved by connecting objects together, typically using an anti-static grounding wire (one of the objects must also be grounded). An adequate bond between two or more conductive objects will allow the charges to flow freely between objects, resulting in no difference in electrical potential. The image on the right shows a Justrite bonding wire, often used to connect a large flammable liquid container to a smaller safety can whilst dispensing the liquid. Our product is here: https://www.firesafetycompliance.co.uk/flammable-liquidsgases/285-dual-hand-clamps-antistatic-grounding-wires.html
The grounding and bonding wires can be seen in use within the following images: