Manage Your Hydrogen. Assist in preventing accidents. Although hydrogen has gained popularity as a fuel source quite quickly, because of its special qualities and uses, it needs to be handled and stored carefully to reduce the risk of burning, fire, and explosion. Because it provides protections for the use of hydrogen in both gas and liquid form, NFPA 2, Hydrogen Technologies Code, is the ultimate reference for building inspectors, engineers, installers, facility managers, and anybody else who works with hydrogen.