(LNG) A cryogenic fluid composed predominantly of methane, but which may contain some butane, ethane, propane, nitrogen, or other components normally found in natural gas
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}