Document ID: chunk:federal_register_of_legislation:F2024C00833:reg:4:p2
Version: federal_register_of_legislation:F2024C00833
Segment Type: reg
Provision Reference: reg 4 (pt 2/7)
Character Range: 200762–203695

American Gas Association on 13 April 2000.
 (6) Measurements must comply with Australian legal units of measurement.
 (7) Standard conditions means, as measured on a dry gas basis:
 (a) air pressure of 101.325 kilopascals; and
 (b) air temperature of 15.0 degrees Celsius; and
 (c) air density of 1.225 kilograms per cubic metre.

2.33  Volumetric measurement—super‑compressed gases
 (1) For subparagraph 2.31(2)(a)(ii), this section applies in relation to measuring the volume of super‑compressed natural gases.
 (2) If it is necessary to correct the volume for deviation from the ideal gas law, the correction must be determined using the relevant method set out in the publication entitled AGA Report No. 8, Compressibility Factor of Natural Gas and Related Hydrocarbon Gases (1994), published by the American Gas Association on 1 January 1994.
 (3) The measuring equipment used must calculate super‑compressibility by:
 (a) if the measuring equipment is category 3 or 4 equipment in accordance with the table in section 2.31—using gas composition data; or
 (b) if the measuring equipment is category 1 or 2 equipment in accordance with the table in section 2.31—using an alternative method set out in the publication entitled AGA Report No. 8, Compressibility Factor of Natural Gas and Related Hydrocarbon Gases (1994), published by the American Gas Association on 1 January 1994.

2.34  Gas measuring equipment—requirements
  For paragraph 2.31(2)(b), gas measuring equipment that is category 3 or 4 equipment in accordance with column 2 of the table in section 2.31 must comply with the following requirements:
 (a) if the equipment uses flow devices—the requirements relating to flow devices set out in section 2.35;
 (b) if the equipment uses flow computers—the requirement relating to flow computers set out in section 2.36;
 (c) if the equipment uses gas chromatographs—the requirements relating to gas chromatographs set out in section 2.37.

2.35  Flow devices—requirements
 (1A) This section is made for paragraph 2.34(a).
 (1) If the measuring equipment has flow devices that use orifice measuring systems, the flow devices must be constructed in a manner that ensures that the maximum uncertainty of the discharge coefficient is not greater than ±1.5%.
Note: The publication entitled AGA Report No. 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids Part 3: Natural Gas Applications, published by the American Gas Association in August 1992, sets out a manner of construction that ensures that the maximum uncertainty of the discharge coefficient is not greater than ±1.5%.
 (2) If the measuring equipment has flow devices that use turbine measuring systems, the flow devices must be installed in a manner that ensures that the maximum uncertainty of the flow measurement is not greater than ±1.5%.
Note: The publication entitled AGA Report No. 8, Compressibility Factor of Natural Gas and Related