ppm和LEL换算

序号气体或蒸汽化学式爆炸下限名称下限VOL%上限VOL%1氢H24752甲烷CH45153乙烷C2H6315.54丙烷C3H82.29.55异丁烷C4H101.88.46乙炔C2H21.51007乙烯