Nitrogen for Cargo & Freight shipping protects the goods and produce during transport or offshore storage. Just as on land, its needs to be stored & protected. Food such as grains, (corn, wheat) cement, chemicals or crude oil is considered a fire hazard. Nitrogen can dramatically reduce this risk to a minimum while protecting the products from oxidation and enzymatic reaction. The oxygen can be completely displaced with the aid of self-produced nitrogen. Due to its high level of inertness, nitrogen is used for headspace filling of cargo holds and liquid tanks. More about the shipping industry.