1 This International Standard specifies a method for the determination of density or relative density of liquefied petroleum gases and other light hydrocarbons. The prescribed apparatus shall not be used for materials having gauge vapour pressures higher than 1,4 MPa (14 bar) (absolute vapour pressure 1,5 MPa) at the test temperature.
CAUTION —Attention is drawn to the hazards en-countered when working with liquefied petroleum gas or light hydrocarbons. The requirements of any national, local or domestic safety code should always be strictly observed.
2 Alternative calibration procedures are described, but only the one using a certified hydrometer is suitable for the deter-mination of density to be used in calculations of quantities for custody transfer or fiscal purposes.
NOTE —An alternative method for calculating the density of liquefied petroleum gases from gas chromatographic analysis is described in ISO 6578.
3 Provision is made in the annex for the use of ther-mohydrometers.
note:1) The SI unit of pressure is the pascal : 1 Pa = 1 N/m; 10 Pa = 1 bar = 1,019 72 kgf/cm
BS EN ISO 3993:1996 history
0000 BS EN ISO 3993:1996(1999)
1996BS EN ISO 3993:1996 Liquefied petroleum gas and light hydrocarbons - Determination of density or relative density - Pressure hydrometer method