International Organization for Standardization (ISO)
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ISO 18453:2004
Scope
This International Standard specifies a method to provide users with a reliable mathematical relationship between water content and water dew point in natural gas when one of the two is known. The calculation method, developed by GERG; is applicable to both the calculation of the water content and the water dew point.
This International Standard gives the uncertainty for the correlation but makes no attempt to quantify the measurement uncertainties.
ISO 18453:2004 history
2004ISO 18453:2004 Natural gas - Correlation between water content and water dew point