《中华人民共和国法定计量单位》颁布已八年多了,但节流装置设计国家标准《GB2624-81》迄今尚未更换。《G132624-81》中的公式绝大部分是按旧制单位推导,计算实例用的也是旧制单位,而且标准中同一物理量采用了多种单位,如压力的单位有kgf/m3、kgf/cm2、bar、mbar;差压单位有有k “Statutory Metrology Unit of the People’s Republic of China” promulgated for more than eight years, but the national standard for throttling device design “GB2624-81” has not been replaced so far. The formula in “G132624-81” is mostly derived from the old unit. The calculation example uses also the old unit, and the standard uses a variety of units for the same physical quantity. For example, the unit of pressure is kgf / m3, kgf / cm2, bar , Mbar; differential pressure unit has k