Gas density meter and method

Details Gas density meter and method Gas density meter and method

1992-10-05

1994-05-03

Williams, Hezron E.

Measuring and testing

Gas analysis

Density or specific gravity

73 2338, 7386101, G01N 932

Patent

active

053076680

ABSTRACT:
Disclosed is a method and apparatus for determining the ratio of the flowing condition density of a pipeline gas (i.e. the density at a flowing temperature and pressure) to the base condition density of the pipeline gas (i.e. the density at a base temperature and pressure). A sample of the pipeline gas is tapped from the pipeline to a first chamber of fixed volume where its temperature is maintained at the temperature of the gas flowing in the pipeline and the pressure of the sample is equivalent to the pressure of the gas in the pipeline. The sample of gas is flowed from the first chamber at a constant mass flow rate and the time rate of change of the pressure in the first chamber is determined. The ratio is derived from the time rate of change of the pressure in the first chamber, and the flowing temperature and pressure. By determining the base condition density separately, the flowing condition density may then be determined.

REFERENCES:
patent: 3701280 (1972-10-01), Stroman
patent: 4285245 (1981-08-01), Kennedy
patent: 4379402 (1983-04-01), Herman, III
patent: 4527418 (1985-07-01), Arcara
patent: 4677841 (1987-07-01), Kennedy
patent: 5201581 (1993-04-01), Vander Heyden et al.
patent: 5226728 (1993-07-01), Vander Hayden

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