Bl This standard establishes the method of naming residual hydrocarbons in commercial propane, for the solidification of mercury. B-2 This method cannot be applied in places where the pressure is not close to normal atmospheric pressure, because although mercury solidifies at it. same temperature, the boiling point of the residual hydrocarbons changes as the pressure varies.
IRAM 6623-1960 history
1960IRAM 6623-1960 Determination of residual hydrocarbons in commercial propane in liquefied petroleum gas