This document specifies the quality requirements for Liquefied Natural Gas (LNG) used as a fuel for marine applications. It defines the relevant parameters to measure as well as the required values and the test reference methods for all those parameters. This document applies to LNG from any source, e.g. gas from conventional reservoirs, shale gas, coalbed methane, biomethane, synthetic methane. LNG described in this document can come from synthesis process out of fossil fuels or renewable sources. This document identifies the required specifications for fuels delivered at the time and place of custody transfer (at the delivery point).
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Sampling
6 Requirements, limit values and related test methods
7 Main compounds removed by liquefaction process
Annex A Propane knock index: Methane number calculation method (normative)
Annex B Examples of LNG composition (informative)
Annex C Methane number (knock resistance) and Wobbe index (thermal input through a restriction) (informative)
Annex D LNG ageing along the bunkering chain (informative)
Annex E Particles (informative)
Annex F Melting and boiling points of pure components and impurities that can be present in different LNG (informative)
EN 16726:2015+A1:2018 Gas infrastructure - Quality of gas - Group H
ISO 6578:2017 Refrigerated hydrocarbon liquids -- Static measurement -- Calculation procedure
ISO 6974-1:2012 Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 1: General guidelines and calculation of composition
EN 16726:2015+A1:2018 Gas infrastructure - Quality of gas - Group H
ISO 6578:2017 Refrigerated hydrocarbon liquids -- Static measurement -- Calculation procedure
ISO 6974-1:2012 Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 1: General guidelines and calculation of composition
ISO 6974-1:2012/Cor 1:2012
ISO 6974-2:2012 Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 2: Uncertainty calculations
ISO 6974-3:2018 Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 3: Precision and bias
ISO 6974-4:2000 Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
ISO 6974-5:2014 Natural gas -- Determination of composition and associated uncertainty by gas chromatography -- Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
ISO 6974-6 Technical Corrigendum 1:2003
ISO 6974-6:2002 Natural gas -- Determination of composition with defined uncertainty by gas chromatography -- Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns
ISO 6976:2016 Natural gas -- Calculation of calorific values, density, relative density and Wobbe indices from composition
ISO 8943:2007 Refrigerated light hydrocarbon fluids -- Sampling of liquefied natural gas -- Continuous and intermittent methods