安全知识－－Gaseous Nitrogen氮气

Nitrogen makes up the major portion of the atmosphere (78.03% by volume, 75.5% by weight). Gaseous nitrogen is inert, colorless, odorless, tasteless, nontoxic, non corrosive, and nonflammable. Nitrogen is inert and will not support combustion; however, it is not life supporting. 氮构成了大气的大部分（体积比78.03，重量比75.5%）。气态氮是不活泼的，无色，无嗅，无味，无毒，无腐蚀性，不可燃。氮是不活泼的，不支持燃烧；但是它不是维持生命的必要元素。 Nitrogen is inert except when heated to very high temperatures, where it combines with some of the more active metals, such as lithium and magnesium, to form nitrides. It will also combine with oxygen to form oxides of nitrogen and when combined with hydrogen in the presence of catalysts, will form ammonia. 一般情况下，氮是不活泼的的。当加热到非常高的温度时它会同更加活泼的金属，如锂和镁反应生成氮化物。它还会同氧反应生成氮的氧化物，而且当在有催化剂存在时它会同氢反应生成氨。 Since gaseous nitrogen is non corrosive, special materials of construction are not required. Vessels and piping should be designed to the American Society of Mechanical Engineers (ASME) standards or Department of Transportation (DOT) codes for the pressure and temperatures involved. 由于气态氮无腐蚀性，不需要特殊的建材。容器和管道系统要根据相关的压力和温度按照美国机械工程师协会（ASME）的标准或交通部（DOT）的规定来设计。 Nitrogen may be compressed into cylinders using water- or oil-lubricated compressors or by dry compression systems. 可以使用水或油润滑的压缩机或干压缩系统把氮压缩进钢瓶。