If you’ve ever driven behind a fuel tanker, you may have noticed something unusual dangling near the rear bumper: a short length of metal chain dragging along the road. At first glance, it might seem like just a loose piece of hardware left behind by a careless mechanic. But in reality, this chain is a crucial safety feature—a simple yet highly effective tool designed to prevent tragedy.
The Role of the Grounding Chain
Tanker trucks are purpose-built to transport liquids and gases such as gasoline, diesel, chemicals, water, and even food products like milk or corn syrup. The cylindrical tanks mounted on heavy-duty chassis are engineered with one primary goal: containment and the safe delivery of their volatile cargo. Yet, even with robust engineering, one invisible hazard always lurks—static electricity.