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ASTM D4784-93(2010)

Historical Reaffirmation

Standard Specification for LNG Density Calculation Models

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1.1 This specification covers LNG density calculation models for use in the calculation or prediction of the densities of saturated LNG mixtures from 90 to 120K to within 0.1 % of true values given the pressure, temperature, and composition of the mixture.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

This specification covers LNG density calculation models for use in the calculation or prediction of the densities of saturated liquefied natural gas (LNG) mixtures at a specified temperature range given the pressure, temperature, and composition of the mixture. Composition restrictions for the LNGs are given for methane, nitrogen, n-butane, i-butane, and pentanes. It is assumed that hydrocarbons with carbon numbers of six or greater are not present in the LNG solution. The mathematical models presented here are the extended corresponding states model, hard sphere model, revised Klosek and McKinley model, and the cell model.


The models in this specification can be used to calculate the density of saturated liquid natural gas in the temperature range 90 to 120K. The estimated uncertainty for the density calculations is ±0.1 %. The restrictions on composition of the liquefied natural gas are:

SDO ASTM: ASTM International
Document Number D4784
Publication Date May 1, 2010
Language en - English
Page Count 3
Revision Level 93(2010)
Supercedes
Committee D03.08
Publish Date Document Id Type View
May 1, 2023 D4784-23 Revision
June 1, 2015 D4784-93R15 Reaffirmation
May 1, 2010 D4784-93R10 Reaffirmation
May 10, 2003 D4784-93R03 Reaffirmation
May 10, 1998 D4784-93R98 Reaffirmation