Method and apparatus for taking a proportional sample of flowing

Details Method and apparatus for taking a proportional sample of flowing Method and apparatus for taking a proportional sample of flowing

1991-03-05

1992-05-26

Noland, Tom

Measuring and testing

Sampler, sample handling, etc.

Flow divider, deflector, or interceptor

7386303, G01N 122

Patent

active

051156873

ABSTRACT:
Disclosed is a method and apparatus for taking a constantly proportional flowing sample of gas flowing through a main line having a first flow restriction therein. According to the teachings of the present of invention, such an apparatus includes a sample line connected to the main line so as to draw a flowing sample of gas from the main line at a point upstream from the first flow restriction; a second flow restriction in the sample line, the second flow restriction being very small relative to the main and sample lines and the first flow restriction; and structure that equalizes the pressure downstream of the first and second flow restrictions.

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patent: 3377867 (1968-04-01), Nitescu
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patent: 3930414 (1976-01-01), Russell
patent: 4125018 (1978-11-01), Clingman, Jr.
patent: 4125123 (1978-11-01), Clingman, Jr.
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patent: 4396299 (1983-08-01), Clingman, Jr. et al.
patent: 4532814 (1985-08-01), Lalin
patent: 4596156 (1986-06-01), Shimizu et al.
patent: 4681530 (1987-07-01), Huber
"A Proportionate Gas Sampler", ISA Journal; May 1963; pp. 73-76; D. L. Hammond.
"Orifice Metering of Natural Gas"; American Gas Association (AGA) Report No. 3 (ANSI/API 2530), Mar. 1978; pp. 1-88.

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