Second Revised Volume No. 1
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Effective Date: 06/13/2008, Docket: RP08-376-000, Status: Effective
Original Sheet No. 53 Original Sheet No. 53 TRANSPORTATION GENERAL TERMS AND CONDITIONS (Continued)2. METHOD OF MEASUREMENT 1. Unit of Measurement - The unit of measurement for the purpose ofcalculating receipt and delivery of natural gas shall be one (1) dekatherm.The number of dekatherms delivered shall be determined by multiplying thenumber of Mcf of gas delivered by the total heating value of such gas in Btu'sper cubic foot, and multiplying the product by 0.001. The unit of volume for the purpose of measurement shall be one (1) Mcfat a pressure of fourteen and seventy-three hundredths pounds per square inchabsolute (14.73 psia) and at a temperature of sixty degrees Fahrenheit (60 F).All readings and registrations of the metering equipment shall be computed intosuch unit of volume. 2. Basis - All orifice meter volumes shall be computed in accordancewith Gas Measurement Committee Report No. 3 of the American Gas Association,including the Appendix thereto, published September, 1969, as revised fromtime to time. Where measurement is by other than orifice meters, allnecessary factors for proper volume determination shall be applied. All orifice meter volumes shall be corrected for deviations from theideal gas laws (supercompressibility) in accordance with the referencedCommittee Report No. 3. Where displacement meters are used, the square of theorifice meter supercompressibility factor shall be applied. For the purpose of measurement, the atmospheric pressure shall be theaverage atmospheric pressure specified in the executed Transportation ServiceAgreement. 3. Determination of Heating Value - The heating value of gas shall bedetermined from time to time by analysis of samples obtained from continuoussampling devices. The samples shall be run on a recording calorimeter,employing the Thomas principle of calorimetry, located at the measuring stationor at any other point on the pipeline where there will be no commingling thereafter of gas, or by means of some other recognized method. The arithmeticaverage heating value of the gas during the chart period shall be used incomputing any deficiency in Btu content of gas delivered during such period.