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RATECALC.DOC
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1990-12-24
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GASWELL ORIFICE METER/PROVER/CHOKE CALCULATION PROGRAM DESCRIPTION
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PURPOSE: TO CALCULATE GAS FLOW RATES FROM ALL POSSIBLE SOURCES OF
GAS MEASUREMENT DATA.
OPTIONS: (1) RATES FROM ORIFICE METER DATA INCLUDING BOTH PIPE
TAPS AND FLANGE TAPS
(2) RATES FROM L-10 SQUARE ROOT CHARTS
(3) RATES FROM CRITICAL FLOW PROVER DATA
(4) RATES FROM POSITIVE CHOKES
INPUT: GAS GRAVITY
DIAMETER OF FLOW STRING (INCHES)
ORIFICE DATA (PRESSURE, DIFFERENTIAL, TEMP, COEFFICIENT)
PROVER DATA (PRESSURE, TEMPERATURE, COEFFICIENT)
CHOKE DATA (PRESSURE, TEMPERATURE, COEFFICIENT)
OUTPUT: FLOW RATE IN MCFD
USES: (1) TO CALCULATE GAS RATES FROM METER CHARTS
(2) TO CALCULATE GAS RATES FROM FIELD COLLECTED DATA
(3) TO CALCULATE GAS RATES FROM DAILY GAUGE REPORTS
(4) TO AUDIT RATES FROM PIPELINE PURCHASER STATEMENTS
TABLES OF COEFFICIENTS FOR ALL OPTIONS ARE PROVIDED WITH THE
SOFTWARE. THIS INCLUDES:
(1) BASIC ORIFICE FACTORS FOR FLANGE TAPS (ADAPTED FROM
AMERICAN GAS ASSOCIATION GAS MEASUREMENT COMMITTEE
REPORT NO. 3
(2) BASIC ORIFICE FACTORS FOR PIPE TAPS (ADAPTED FROM
AMERICAN GAS ASSOCIATION GAS MEASUREMENT COMMITTEE
REPORT NO. 3
(3) BASIC CRITICAL FLOW PROVER FACTORS FOR BOTH TWO-INCH
PROVERS AND FOUR-INCH PROVERS
(4) BASIC POSITIVE CHOKE FACTORS FOR BOTH SIX-INCH CHOKE
NIPPLE AND THORNHILL-CRAVER POSITIVE CHOKE
(5) A TABLE IS ALSO PROVIDED TO ESTIMATE NON-CRITICAL FLOW
RATES FROM CHOKES AND PROVERS
ADDITIONAL DOCUMENTATION IS INCLUDED WITHIN THE PROGRAM AS ONE OF
THE MAIN MENU OPTIONS.