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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)

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Kehtiv alates 19.12.2018
Alusdokumendid
EN ISO 6974-3:2018; ISO 6974-3:2018
Tegevusala (ICS grupid)
75.060 Maagaas
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Standardi ajalugu

Staatus
Kuupäev
Tüüp
Nimetus
19.12.2018
Põhitekst
05.03.2002
Põhitekst
This document describes the precision that can be expected from the gas chromatographic method that is set up in accordance with ISO 6974-1. The stated precision provides values for the magnitude of variability that can be expected between test results when the method described in ISO 6974-1 is applied in one or more competent laboratories. This document also gives guidance on the assessment of bias.
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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
Põhitekst

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)
Uusim versioon Kehtiv alates 05.06.2012
Põhitekst

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
Põhitekst

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