Texas Gas Transmission, LLC
Third Revised Volume No. 1
Contents / Previous / Next / Main Tariff Index
Effective Date: 09/15/2008, Docket: RP08-392-000, Status: Effective
Original Sheet No. 1601 Original Sheet No. 1601 GENERAL TERMS AND CONDITIONS Section 4 (Cont'd) (d) The temperature of the gas for any day shall be determined by taking the arithmetic average of the hourly temperature readings, or by transmitting the temperature directly to a flow computer from a thermometer so installed as to properly sense the temperature of the gas passing through the meters; provided, however, that where quantities of gas metered will not be materially affected by doing so, the temperature of the gas for any day may be determined by any other recognized method which may be practical in the circumstances; and (e) The specific gravity of the gas shall be determined for any day by taking the arithmetic average of the hourly reading or by transmitting the gravity directly to the flow computer from a gravitometer of approved type which shall be checked at least once each month by the use of an Edwards balance or by any other industry accepted method, by chromatographic analysis using the compound values contained in the American Gas Association Gas Measurement Committee Report No. 3. September, 1985 (ANSI/API 2530 approval May, 1985), or any revision thereof; provided, however, that where quantities of gas metered will not be materially affected by doing so, the specific gravity of the gas for any day may be determined by any other recognized method which may be practicable in the circumstances. 4.4 All orifice meter volumes shall be computed in accordance with the American Gas Association Measurement Committee Report No. 3, September, 1985 (ANSI/ API 2530 approval May, 1985), including the Appendices thereto and modifications and amendments thereof. 4.5 All turbine meter volumes shall be computed in accordance with the American Gas Association Transmission Measurement Committee Report No. 7, November, 1984, including the Appendices thereto and modifications and amendments thereof. 4.6 In the cases where measurements shall be other than orifice or turbine meters all necessary factors for proper volume determination shall be applied. 4.7 Spot gas samples taken from the pipeline system for purposes of determining or deriving quantitative values that will be used in the computation of gas volume and Btu per cubic foot shall be obtained by use of the method contained in Gas Processors Association Publication Number GPA 2166-86, GPA Method for Obtaining Natural Gas Samples for Analysis by Gas Chromatography. 4.8 For purposes of instrument calibration and engineering formulae for volume and MMBtu computation, 30 inches of mercury shall equate to 14.73 psia. Conversion of volumes and MMBtu to other contractual conditions shall be made from the base of 14.73 psia.