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# water content in natural gas

## water content in natural gas

(OP)
thread798-381370: water content in natural gas

Hi all
I'm confused about the chart of water contained in natural gas
in the chart mc Keeta-Wehe maximum temperature is 280 F, while the temperature of mine mine is 325 F.

so, How do I get for water contained in natural gas ?

### RE: water content in natural gas

Approx value at 325degF may be obtained from the graphs further down - fig 20-10 and 20-11 in GPSA 11th edition (yr 1998). By looking at these trends, it should also be possible to extrapolate numerically out to 325degF with some more effort.

### RE: water content in natural gas

at those high temperatures (325 F) vapor pressure for water is relatively high and you may estimate assuming ideal law with relatively limited errors,
as noted in mentioned thread 798-381370 at lower temperatures you may get accurate results with specific methods (see for example ISO 18453) which however require a software...

### RE: water content in natural gas

At that temperature I'd check a steam table to see what the boiling point of water is at your pressure. If the pressure is below 95 psia then in a very short time the liquid will boil off and the McKetta chart is not valid. Above that pressure, and the chart is log-log linear above about 200F so extrapolating is quite reasonable.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

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