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  • ASTM D 7940 : 2014

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Standard Practice for Analysis of Liquefied Natural Gas (LNG) by Fiber-Coupled Raman Spectroscopy

    Available format(s):  Hardcopy, PDF

    Superseded date:  04-01-2022

    Language(s):  English

    Published date:  16-07-2014

    Publisher:  American Society for Testing and Materials

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    Abstract - (Show below) - (Hide below)

    CONTAINED IN VOL. 05.06, 2014 Defines both on-line and laboratory instrument-based determination of composition for liquefied natural gas (LNG) using Raman spectroscopy.

    Scope - (Show below) - (Hide below)

    1.1This standard practice is for both on-line and laboratory instrument-based determination of composition for liquefied natural gas (LNG) using Raman spectroscopy. The basic methodology can also be applied to other light hydrocarbon mixtures in either liquid or gaseous states, if the needs of the application are met, although the rest of this practice refers specifically to liquids. From the composition, gas properties such as heating value and the Wobbe index may be calculated. The components commonly determined according to this test method are CH4, C2H6, C3H8, i-C4H10, n-C4H10, iC5H12, n-C5H12, neo-C5H12, N2, O2. The applicable range of this standard is 200 ppmv to 100 mol %. Components heavier than C5 are not measured as part of this practice.

    Note 1:Raman spectroscopy does not directly quantify the component percentages of noble gases, however, inerts can be calculated indirectly by subtracting the sum of the other species from 100 %.

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

    1.3This 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.

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    Committee D 03
    Document Type Standard Practice
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By

    Standards Referencing This Book - (Show below) - (Hide below)

    ASTM D 1946 : 1990 : R2015 : EDT 1 Standard Practice for Analysis of Reformed Gas by Gas Chromatography
    BS EN 60079-28:2015 Explosive atmospheres Protection of equipment and transmission systems using optical radiation
    ASTM D 3588 : 1998 : R2017 : EDT 1 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
    ASTM D 3588 : 1998 : R2017 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
    ASTM D 4150 : 2021 : REV A Standard Terminology Relating to Gaseous Fuels
    ASTM D 4150 : 2020 : REV A Standard Terminology Relating to Gaseous Fuels
    ASTM D 1945 : 1996 : EDT 1 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM E 691 : 2020 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
    ASTM D 1945 : 1996 : R2001 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 1946 : 1990 : R2006 Standard Practice for Analysis of Reformed Gas by Gas Chromatography
    ASTM D 3588 : 1998 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
    ASTM D 7833 : 2014 : REDLINE Standard Test Method for Determination of Hydrocarbons and Non-Hydrocarbon Gases in Gaseous Mixtures by Gas Chromatography
    ASTM D 1946 : 1982 Standard Method for Analysis of Reformed Gas by Gas Chromatography
    ASTM E 691 : 2019 : EDT 1 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
    ASTM D 4150 : 2019 Standard Terminology Relating to Gaseous Fuels
    ASTM D 7833 : 2014 Standard Test Method for Determination of Hydrocarbons and Non-Hydrocarbon Gases in Gaseous Mixtures by Gas Chromatography
    ASTM E 691 : 2009 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
    ASTM D 4150 : 2008 Standard Terminology Relating to Gaseous Fuels
    ASTM D 4150 : 2000 Standard Terminology Relating to Gaseous Fuels
    ASTM D 3588 : 1998 : R2003 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
    ASTM D 1946 : 1977 Standard Method for Analysis Of Reformed Gas By Gas Chromatography
    ASTM D 1945 : 2003 : R2010 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 3588 : 1998 : R2011 Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
    ASTM D 1945 : 2014 : R2019 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 1946 : 1990 : R2000 Standard Practice for Analysis of Reformed Gas by Gas Chromatography
    ASTM D 1945 : 2003 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 1946 : 1990 : R2019 Standard Practice for Analysis of Reformed Gas by Gas Chromatography
    ASTM D 4150 : 2003 Standard Terminology Relating to Gaseous Fuels
    BS EN 60825-1:2014 Safety of laser products Equipment classification and requirements
    ASTM D 4150 : 2021 Standard Terminology Relating to Gaseous Fuels
    ASTM D 4150 : 2008 : R2016 Standard Terminology Relating to Gaseous Fuels
    ASTM D 1945 : 2014 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 4150 : 2021 : REV B Standard Terminology Relating to Gaseous Fuels
    ASTM D 7833 : 2020 Standard Test Method for Determination of Hydrocarbons and Non-Hydrocarbon Gases in Gaseous Mixtures by Gas Chromatography
    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
    ASTM D 1946 : 1990 : R2011 Standard Practice for Analysis of Reformed Gas by Gas Chromatography
    ASTM D 1945 : 2014 : REDLINE Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 1945 : 1991 Standard Test Method for Analysis of Natural Gas by Gas Chromatography
    ASTM D 7833 : 2012 Standard Test Method for Determination of Hydrocarbons and Non-Hydrocarbon Gases in Gaseous Mixtures by Gas Chromatography
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