What is the significance of the IG system on a tanker?

The significance of the Inert Gas (IG) system on a tanker plays a crucial role in enhancing safety during the transportation of flammable liquids, primarily by reducing the risk of explosions. The IG system works by displacing the flammable vapors in the cargo tanks with a nitrogen-rich gas, which is non-combustible. This creates an inert atmosphere that minimizes the presence of oxygen, significantly lowering the chances of vapor ignition.

By maintaining a controlled environment within the cargo tanks, the IG system helps to prevent explosive situations that could arise from potential ignition sources, such as static electricity or equipment sparks. Thus, its implementation is a vital safety measure required by international regulations for tankers carrying volatile cargoes. This function not only protects the vessel and crew but also the marine environment and surrounding communities from potential disasters associated with explosions or fires related to cargo vapors.

While fuel efficiency, loading speed, and cooling cargo temperature are relevant operational considerations, they do not pertain directly to the primary function of the IG system in mitigating explosion risks.