ISO 6578:2017 PDF

Scope: 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.

ISO 6578:2017 Referenced Document

ISO 10976:2015 Refrigerated light hydrocarbon fluids - Measurement of cargoes on board LNG carriers
ISO 3993:1984 Liquefied petroleum gas and light hydrocarbons; Determination of density or relative density; Pressure hydrometer method
ISO 6976:2016 Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition
ISO 8973:1997 Liquefied petroleum gases - Calculation for density and vapour pressure
ISO 91:2017 Petroleum and related products - Temperature and pressure volume correction factors (petroleum measurement tables) and standard reference conditions
JIS K 2240:2013 Liquefied petroleum gases

2017 ISO 6578:2017 Refrigerated hydrocarbon liquids - Static measurement - Calculation procedure
1991 ISO 6578:1991 Refrigerated hydrocarbon liquids; static measurement; calculation procedure