ISO 3838:2004 PDF

Scope: 1 This International Standard specifies methods for the determination of the density or relative density of crude petroleum and of petroleum products handled as liquids. 2 The capillary-stoppered pyknometer method is also for use with solids and this method may also be used for coal tar products, including road tars, creosote and tar pitches, or for mixtures of these with petroleum products. This method is not suitable for the determination of the density or relative density of highly volatile liquids having Reid vapour pressures greater than 50 kPa according to ISO 3007 or having an initial boiling point below 40 ℃. 3 The graduated bicapillary pyknometer method is recommended for the accurate determination of the density or relative density of all except the more viscous products, and is particularly useful when only small amounts of samples are available. The method is restricted to liquids having Reid vapour pressures of 130 kPa or less according to ISO 3007 and having kinematic viscosities less than 50 mm/s [50 centistokes (cSt)] at the test temperature. Special precautions are specified for the determination of the density or relative density of highly volatile liquids.

ISO 3838:2004 Referenced Document

ISO 3007:1999 Petroleum products and crude petroleum - Determination of vapour pressure - Reid method
ISO 3507:1999 Laboratory glassware - Pyknometers
ISO 5024:1999 Petroleum liquids and liquefied petroleum gases - Measurement - Standard reference conditions
ISO 653:1980 Long solid-stem thermometers for precision use
ISO 91-1:1992 Petroleum measurement tables; part 1: tables based on reference temperatures of 15 °C and 60 °F
ISO 91-2:1991 Petroleum measurement tables; part 2: tables based on a reference temperature of 20 °C

2023 ISO 3838:2004/Amd 1:2023 Crude petroleum and liquid or solid petroleum products
2004 ISO 3838:2004 Crude petroleum and liquid or solid petroleum products - Determination of density or relative density - Capillary-stoppered pyknometer and graduated bicapillary pyknometer methods
1983 ISO 3838:1983 Crude petroleum and liquid or solid petroleum products; Determination of density or relative density; Capillary-stoppered pyknometer and graduated bicapillary pycnometer methods