Is Ammonia flammable?
Yes, ammonia will burn, but only if ammonia gas is mixed with the proper proportion of air. The flammable limits of a mixture are reported as 16-25 percent of ammonia vapor in air. Ammonia-air mixtures are difficult to ignite. It requires an intense ignition source and a high concentration of gas. The ignition temperature is in excess of 1560 degrees F. But never let the flammable limits and high ignition temperatures give you a false level of security. It is impossible to test mixture percentages in a storage tank, nurse tank, applicator or piping. Under no condition should welding or cutting be done on ammonia equipment until the equipment has been completely decontaminated and thoroughly cleaned of all salt and ammonia.
