BS ISO 6578:2017
Current
The latest, up-to-date edition.
Refrigerated hydrocarbon liquids. Static measurement. Calculation procedure
Hardcopy , PDF
English
20-10-2017
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Outline of calculation
5 Mass
6 Energy content (calorific content)
7 Inter-conversion of liquid mass and vapour volume
at standard conditions
8 Calculation of liquid density from composition
9 Calculation of calorific value from composition
Annex A (informative) - Characteristics of static
measurement of refrigerated hydrocarbon
liquids
Annex B (normative) - Molar volume of individual
component
Annex C (normative) - Correction factors for
volume reduction of LNG mixtures
Annex D (normative) - Gross calorific values for
individual components
Annex E (normative) - Molar mass, compression
factor and summation factor of individual
component
Annex F (informative) - Boiling point of individual
component
Annex G (informative) - Alternative procedure to
calculate liquid density from composition
Bibliography
Describes the calculation procedure to convert the volume of liquefied petroleum gas (LPG) and liquefied natural gas (LNG) under the conditions at the time of measurement to the equivalent volume of liquid or vapour at the standard condition, i.e. 15 degrees C and 101,325 kPaA, or to the equivalent mass or energy (calorific content).
| Committee |
PTI/12
|
| DevelopmentNote |
Supersedes 17/30327536 DC & BS 7577(1992). (10/2017)
|
| DocumentType |
Standard
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This document specifies the calculation procedure to convert the volume of liquefied petroleum gas (LPG) and liquefied natural gas (LNG) under the conditions at the time of measurement to the equivalent volume of liquid or vapour at the standard condition, i.e. 15°C and 101,325 kPaA, or to the equivalent mass or energy (calorific content). It applies to the quantities of refrigerated hydrocarbon liquids stored in or transferred to/from tanks and measured under static storage conditions. Calculation of pressurized gases is out of the scope of this document.
| Standards | Relationship |
| ISO 6578:2017 | Identical |
| ISO 3993:1984 | Liquefied petroleum gas and light hydrocarbons — Determination of density or relative density — Pressure hydrometer method |
| ISO 91:2017 | Petroleum and related products — Temperature and pressure volume correction factors (petroleum measurement tables) and standard reference conditions |
| ISO 6976:2016 | Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition |
| GPA 2145 : 2016 | TABLE OF PHYSICAL PROPERTIES FOR HYDROCARBONS AND OTHER COMPOUNDS OF INTEREST TO NATURAL GAS AND NATURAL GAS LIQUIDS INDUSTRIES |
| ISO 8973:1997 | Liquefied petroleum gases — Calculation method for density and vapour pressure |
| ISO 10976:2015 | Refrigerated light hydrocarbon fluids — Measurement of cargoes on board LNG carriers |
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