Why is there always an iron chain dragging behind a tanker truck?
2 Answers
Because during the transportation of oil, friction between the oil and the tank walls generates static electricity. The iron chain dragging behind the tanker truck serves to promptly transfer the generated electric charge to the ground, thereby eliminating the risk of explosion. Below is relevant knowledge about tanker trucks: 1. They are specialized vehicles designed for transporting fuel, with metal-constructed bodies. 2. Static electricity generated during driving poses safety hazards, so these vehicles are equipped with anti-static devices. Below are daily maintenance tips for tanker trucks: 1. The use and maintenance of oil pumps should strictly follow the accompanying operation manual. 2. The use and maintenance of fuel dispensers should strictly follow the accompanying operation manual. 3. If oil output is slow or fails, check the safety valve and filter screen, which should be regularly inspected and cleaned. 4. The oil tank and pipeline system should be cleaned periodically. Regularly inspect all connection points in the pipeline system to ensure proper connection and reliable sealing.
I've been driving tanker trucks for 20 years, and this iron chain dragging on the ground isn't just for decoration—it's specifically designed to prevent static sparks. The oil in the tank sloshes around during transit, creating static charges through friction with the tank walls. If these charges aren't discharged in time, they can accumulate and spark, potentially igniting the oil vapors inside and causing an explosion. I've seen accident cases, and the consequences can be catastrophic. The chain touching the ground acts like a grounding wire, safely dissipating the static electricity. Before every trip, I check the chain to ensure it's secure and replace it if it's worn out. All my colleagues in the industry do the same—it's an essential safety measure for transporting hazardous materials. Don't cut corners; though small, this chain can save lives and cargo. Without it, the risks are even greater, especially on highways exposed to wind and rain.
