Electricity and Gas Inspection Regulations (SOR/86-131)

• 37. (1) The atmospheric pressure shall be calculated for a meter location by using the following equation, namely,

  • (a) in the International system of units,

    P_a = 101.560 - (0.0113 × M) kPa, or

  • (b) in the Imperial system of units,

    P_a = 14.73 - (0.0005 × F) psia

    where

  • (c) P_a is the calculated atmospheric pressure; and

  • (d) M is the number of metres of elevation of the meter location above mean sea level and F is the number of feet of elevation of the meter location above mean sea level, in either case as determined by a survey carried out by a registered surveyor or as determined from the most recent applicable topographical maps published by the Department of Energy, Mines and Resources.

• (2) The atmospheric pressure declared for a meter location shall not differ from the atmospheric pressure calculated for that meter location pursuant to subsection (1) by more than

  • (a) in the International system of units,

    0.621 + (0.001 × P_ga) kPa, or

  • (b) in the Imperial system of units,

    0.090 + (0.001 × P_ga) psi

    where

    P_ga 

    is the average meter pressure expressed on the gauge pressure scale.

• 38. (1) Subject to section 39, the temperature multiplier for any temperature converting meter shall be established by using the following equation, namely,

  • (a) in the International system of units,

    T_m = 288.15/(T_b + 273.15), or

  • (b) in the Imperial system of units,

    T_m = 519.67/(T_b + 459.67)

    where

  • (c) T_m is the temperature multiplier; and

  • (d) T_b is the temperature established by the contractor and used as the base temperature for the calibration of the temperature converting meter.

• (2) Subject to section 39, the temperature multiplier of any meter other than a temperature converting meter shall be established by using the following equation, namely,

  • (a) in the International system of units,

    T_m = 288.15/(T_ga + 273.15), or

  • (b) in the Imperial system of units,

    T_m = 519.67/(T_ga + 459.67)

    where

  • (c) T_m is the temperature multiplier; and

  • (d) T_ga is the average flowing gas temperature.

39. A temperature multiplier of one may be used for

• (a) meters that are purchased prior to December 31, 1986 and

  • (i) that have a capacity that is less than 14 standard cubic metres per hour at a differential pressure of 0.125 kPa, or

  • (ii) that have a capacity that is less than 500 standard cubic feet per hour at a differential pressure of 0.5 in. of water column;

• (b) meters that are installed prior to December 31, 1986, where the average meter pressure exceeds the atmospheric pressure by more than 3.5 kPa in the International system of units or 0.5 psi in the Imperial system of units; and

• (c) meters that are installed where the average meter pressure does not exceed the atmospheric pressure by more than 3.5 kPa in the International system of units or 0.5 psi in the Imperial system of units and that

  • (i) were most recently sealed prior to December 31, 1986, and

  • (ii) have a capacity that is greater than that stated in sub-paragraph (a)(i) or (ii), whichever is applicable.