Transcontinental Gas Pipe Line Company, LLC

Fourth Revised Volume No. 1

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Effective Date: 12/31/2008, Docket: RP09-158-000, Status: Effective

Original Sheet No. 341 Original Sheet No. 341







4. MEASUREMENTS (Continued)


(b) Quantity and Heating Value (Continued)


(v) The specific gravity of the gas flowing through the meters, when necessary for

computing gas quantities, shall be, unless otherwise agreed upon, determined by

the use of a recording gravitometer or an online process type gas

chromatograph. The arithmetic average of the 24-hour record, or so much of the

24 hours as gas has been flowing, or continuous instantaneous specific gravity

measurement may be applied to metering instruments to provide the quality



(vi) The deviation of the gas from Ideal Gas Laws shall be calculated following the

recommendations of the ANSI/API 2530 "Orifice Metering of Natural Gas and Other

Related Hydrocarbon Fluids" (A.G.A. Report No. 3) including the A.G.A. Manual

for Determination of Supercompressibility Factors of Natural Gas or the A.G.A.

Transmission Measurement Committee Report No. 8 "Compressibility and

Supercompressibility for Natural Gas and Other Hydrocarbon Gases." If the

composition of the gas is such as to render the above procedure inapplicable,

other methods for determination of the deviation factors, mutually agreed upon

by Buyer and Seller, shall be used.


(vii) The Heating Value shall be determined by either (1) the use of a suitably

located and acceptable make gas chromatograph or (2) calculation from a

fractional analysis, or (3) methods outlined in A.G.A. Gas Measurement

Committee Report No. 5, latest edition, or (4) other methods mutually

acceptable. Dekatherms delivered shall be determined by either (1) multiplying

the Mcf delivered by a fraction the numerator of which is the Btu per cubic

foot and the denominator of which is 1,000 or (2) multiplying the pounds mass

delivered by a fraction the numerator of which is the Btu per pound mass and

the denominator of which is 1,000,000.


(c) Quantities to New York Companies


The quantity of gas delivered to The Brooklyn Union Gas Company, Consolidated Edison

Company of New York, Inc. and Long Island Lighting Company (New York Companies)

through Seller's meters at the points of delivery into the New York facilities,

defined as the mains and appurtenant facilities referred to in the New York Facilities

agreement dated as of December 31, 1959, shall be determined, for any period, by

allocating to each Buyer the total quantity of gas delivered by Seller. The method

for allocating such total quantity shall be mutually agreed to by the New York

Companies and furnished to Seller. The quantity of gas received by each New York

Company shall be based on meter charts sent to Seller daily or by such other method as

may be mutually agreed upon. Seller shall promptly furnish the quantity received by

each company as so determined together with the allocation of the total quantity

delivered by Seller.