IG System (IGS)

Inert Gas System - An oil tanker's inert gas system is one of the most important arts of its design. Fuel oil itself is very difficult to ignite, however its hydrocarbon vapours are explosive when mixed with air in certain concentrations. The purpose of the system is to create an atmosphere inside tanks in which the hydrocarbon oil vapours cannot burn Inert gas systems deliver air with an oxygen concentration of less than 5% by volume