Discharges of static electricity are a powerful force that can cause an unexpected disaster when using tanker vehicles. Such a catastrophic event could happen if a stray static spark comes in contact with a combustible material or flammable liquid being transferred by the vehicle. Static electricity is invisible to the naked eye, can be found almost everywhere, and cannot be simply eliminated and it is very simple to generate static spark discharges when pumping. This is why companies who have purchased a pump truck for sale must be very careful about stray static sparks by using proper grounding for protection.
Proper Grounding and Bonding
Static electricity is indeed invisible, cannot be seen yet is everywhere. Discharges of it can’t be eliminated but can be controlled through proper grounding and bonding, which is one of the essential aspects to consider in relation to static electricity. Basically, this is the joining of conductive components through a strong electric device to maintain an equal electrical potential level. With this method, electrostatic discharges cannot occur when the assembly or connected components have equal electrical potential. Grounding is the step after bonding that connects such equipment to the earth to dissipate any electrostatic discharge between potentially conductive material and any handling equipment.
Proper grounding means that a vac truck for sale is connected to an identified ground point to be sure that static electricity cannot accumulate and result in ignition or explosion while transferring combustible or flammable products. Installation of an earthing system is vital; it should be set up by professionals, inspected, and maintained periodically to ensure that there is continuity and adequacy of the system.
Transferring Flammable Material
There are several recommended practices that must be observed when using vacuum trucks to handle flammable products. Specifically, three standards were made to deliver a clear direction about what security measures should be observed. These are: NFPA 77, CLC/TR:50404, and API RP 2003. It is highly recommended that every tanker truck be properly grounded before any transfer process and never neglected but rather given a top priority.
Proper Grounding and Ohm’s Limit
Proper grounding must provide an electrical path that will direct static electricity to the earth and prevent it from gathering on a vehicle’s tank. This electrical path ensures that a spark will not occur and result in property damage or injury to bystanders. To conduct a safe and proper product transfer, the pathway’s electrical resistance must be measured. According to API RP 2003 and NFPA 77, safe handling requires that the circuit from the vehicle to the ground not exceed 10 ohms. If resistance is above the recommended limit, that means something is wrong with the connection from the clamp to the earth connection and any problem must be fixed.
It is also highly recommended to have interlocks that function to stop the flow of any material or product if the tanker becomes disconnected from the established earthing system – and the potential for static build up with the safety of the bonding and grounding system being functional.
Any vacuum truck that transfers hazardous or inflammable material must have a proper grounding system to avoid a static caused fire or explosion during loading and unloading. All standards and recommended practices to control static electricity discharges during tank truck transfers must be known and closely followed. For proper operation of a vac truck for sale to avoid spark gaps that could ignite explosions or fires, it is imperative to have a means to eliminate any static electricity risk from happening – this must be the standard!
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