Viking Gas Transmission Company

First Revised Volume No. 1

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Effective Date: 07/01/2004, Docket: RP04-306-000, Status: Effective

Third Revised Sheet No. 45 Third Revised Sheet No. 45 : Effective

Superseding: First Revised Sheet No. 45

 

GENERAL TERMS AND CONDITIONS

 

 

3. MEASUREMENT AND SCHEDULING OF RECEIPTS AND DELIVERIES (Continued)

 

3.1. Determination of Quantity and Total Heating Value (Continued)

 

(b) Determination of Total Heating Value

 

The Total Heating Value of the gas per cubic foot shall be determined by

taking the average of the heating values determined as determined by

chromatographic analysis of a sample of gas or any other method mutually

agreed upon.

 

The average (flow weighted) heating value of the gas per cubic foot

(Btu/cf) for a unit of time shall be determined by the total Dths divided

by the total Mcf quantity multiplied by 1000.

 

The standardized reporting basis for Btu is 14.73 dry psia and

60 degrees F (101.325 kPa and 15 degrees C, and dry). The standardized

reporting basis for gigacalorie is 1.035646 Kg/cm2 and 15.6 degrees C and

dry. [2.3.9/v1.3]

 

Dths shall be determined by multiplying the Mcf quantity by the ratio of

the heating value per cubic foot to 1,000.

 

For reporting purposes, Btu conversion factors shall be reported to not

less than 3 decimal places. For calculating purposes, not less than

6 decimal places shall be used. [2.3.10/v1.0]

 

(c) Determination of Gas Temperature

 

The temperature of the gas passing through the meters shall be determined

continuously by a recording thermometer so installed that it may properly

record the temperature of the gas flowing through the meters. Arithmetic

averages of the temperature recorded each Gas Day shall be used in

computing the measured volume of gas in Mcf.

 

(d) Determination of Specific Gravity

 

The specific gravity of the gas delivered shall be determined by the use

of chromatographic analysis or any other method mutually agreed upon.

Determination of the specific gravity and heating value per cubic foot

(Btu/cf) shall be determined at approximately the same time or from the

same analyzed gas sample.

 

(e) Deviation from Boyle's Law

 

The deviation of the natural gas from Boyle's Law shall be determined by

the use of the tables of formulae published by the American Gas

Association Par Research Project NX-19 corrected for carbon dioxide (C02)

and nitrogen (N2), or any applicable formulae published by the American

Gas Association. The molecular percentage of N2 and CO2 shall be

determined at approximately the same time or from the same analyzed gas

sample used for the determination of the compressibility factors, with

corrections for specific gravity, temperature and pressure.