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EVS-EN ISO 6974-2:2012

Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 2: Uncertainty calculations (ISO 6974-2:2012)

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Kehtiv alates 05.06.2012
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ISO 6974-2:2012; EN ISO 6974-2:2012
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75.060 Maagaas
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05.06.2012
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This part of ISO 6974 describes the process required to determine the uncertainty associated with the mole fraction for each component from a natural gas analysis in accordance with ISO 6974‑1.

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EVS-EN 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)
Uusim versioon Kehtiv alates 05.06.2012
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EVS-EN ISO 6974-4:2002

Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 4: Determination of nitrogen, carbon dioxyde and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
Uusim versioon Kehtiv alates 05.03.2002
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EVS-EN 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 6974-5:2014)
Uusim versioon Kehtiv alates 04.08.2014
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EVS-EN ISO 6974-3:2018

Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 3: Precision and bias (ISO 6974-3:2018)
Uusim versioon Kehtiv alates 19.12.2018