ASTM D1657 - Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer.
This test method covers the determination of the density or relative density of light hydrocarbons including liquefied petroleum gases (LPG) having Reid vapour pressures exceeding 101.325 kPa (14.696 psi).
IP 235 - ISO 3993 - Density or Relative Density of LPG and of Light Hydrocarbons by Pressure Hydrometer.
The prescribed apparatus shall not be used for materials having gauge vapour pressures higher than 1,4 MPa (absolute vapour pressure 1,5 MPa) at the test temperature.
Hydrometer Apparatus ASTM D1657
Tubular chamber made in acrylic resins ∅ 50 × 36 mm, L = 440 mm
Metallic headers coupled with six stainless steel tie rods
Three ¼” pin cocks
Mesh safety guard
Tested to 15 bar hydraulic pressure
Double scale manometer 0-2500 kPa, 0-350 Psi
Thermohydrometer ASTM 310H range 0.500-0.650, thermometer range -10..+35°C