The transfer of hazardous chemicals poses an increased risk to workers and the environment as the chemicals are unconfined while being poured or pumped from one container to another. Proper transfer tools and procedures will reduce the potential for spills, which can result in negative impacts to workers’ health or the environment. These tools and procedures can also result in cost savings by reducing chemical loss.
Grounding & Bonding of Flammable Chemicals
Grounding and bonding is used to help control the risks associated with static electricity. When transferring liquid chemicals from one container to another, the movement of chemicals via the transfer tools may generate a static electricity charge. This can create a difference in the electrical charge between the two containers. If this static electricity charge is released, it can create a spark. If the chemicals being transferred have a low flash point, meaning they are highly flammable, this can result in a fire or explosion.
When transferring Category 1, 2, or 3 flammable chemicals with a flash point below 37.8 °C, The pouring and receiving containers should be bonded (connected with a wire and clamp assembly) to equalize the electrical charge between both containers. These bonded containers should then be grounded (connected to a grounded or earthed wire) to allow any build-up of static electricity to be release to the ground. An example of bonded an grounded containers is illustrated in the figure below: