Dominion South Pipeline Co., LP
Original Volume No. 1
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Effective Date: 12/16/2005, Docket: CP05- 77-001, Status: Effective
Original Sheet No. 1009 Original Sheet No. 1009 : Effective
GENERAL TERMS AND CONDITIONS
MEASUREMENT AND MEASUREMENT EQUIPMENT
3. MEASUREMENT AND MEASUREMENT EQUIPMENT
3.1 Measurement Unit. The unit of measure for all Gas Deliverable hereunder shall be one Dt,
measured as provided in this Section 3.
3.2 Quantity and Heating Value Determination. The quantity and heating value of Gas Received or
Delivered by Pipeline shall be determined as follows:
A. The unit of volume for the purpose of measurement shall be one cubic foot of Gas at 60
degrees Fahrenheit and dry and an absolute pressure of 14.73 pounds per square inch.
B. The average absolute atmospheric pressure shall be assumed to be fourteen and seven-
tenths pounds to the square inch (14.7 psi), irrespective of actual elevation or
location of the Point of Delivery above sea level or variations in such atmospheric
pressure from time to time.
C. The temperature of the Gas flowing through meters, when necessary for computing Gas
quantities, shall be determined for any Gas Day by the use of instantaneous temperature
measurements applied to measuring equipment, by the use of a properly installed
continuous recorder, or by assuming 60 degrees Fahrenheit for low volume meters. When
continuous recorders are used, the arithmetic average of the temperature recorded each
Gas Day shall be used to compute Gas quantities.
D. The specific gravity of the Gas shall be determined for any one Gas Day by the use of
instantaneous specific gravity measurements applied to metering instruments, by the use
of Gas Chromatography, or by approved methods with such reasonable frequency as is
found expedient in practice. The method of test used to determine specific gravity, in
the absence of continuous recording or instantaneous devices, shall be by the use of an
approved gravity instrument or fractional analysis.
E. The deviation of Gas from Ideal Gas Laws shall be calculated according to the
recommendations of the American Gas Association (AGA) Transmission Measurement
Committee Report No. 8 "Compressibility Factor of Natural Gas and Related Hydrocarbon
Gases," (1994) as may be amended or modified from time to time, or by other mutually
agreed upon methods.
1. Orifice meters shall be calculated according to AGA Report No. 3 Part 1 (1990),
Part 2 (2000), Part 3 (1992), and Part 4 (1992) as may be amended or modified from
time to time, or by other mutually agreed upon methods.
2. Turbine and displacement meters shall be calculated according to AGA Report No. 7
(1996) as may be amended or modified from time to time, or by other mutually agreed
3. Ultrasonic meters shall be calculated according to AGA Report No. 9, 1998, as may
be amended or modified from time to time, or by other mutually agreed upon methods.