GENERAL TERMS AND CONDITIONS
5. MEASUREMENT AND MEASUREMENT EQUIPMENT (Cont'd.)
the actual location or elevation above sea level of
the Point of Receipt or Point of Delivery or of
variations in actual atmospheric pressure from time to
time.
(iii) The flowing temperature of the Gas shall be determined
by means of an instrument of standard manufacture
accepted in the industry for this purpose.
(iv) The supercompressibility factor used in computing the
volume of Gas delivered through an orifice meter shall
be determined in a manner consistent with the
procedure presented in the American Gas Association
Transmission Measurement Committee Report No. 8
entitled "Compressibility factors of Natural Gas and
Other Related Hydrocarbon Gases."
(v) The specific gravity of the Gas used in computing the
volume of Gas delivered through a meter shall be
determined by means of an instrument of standard
manufacture accepted in the industry for this purpose
installed at a point to measure the specific gravity
of the Gas stream from which Gas is being delivered at
the Point of Receipt or Point of Delivery.
(vi) The compressibility ratio factor "s" used in computing
the volume of Gas delivered through a turbine meter or
a positive deplacement meter shall be determined by
the equation s = (Fpv)2, in which "(Fpv)" is the
supercompressibility factor determined as described in
subparagraph (iv) of this subsection (b).
(vii) In determining the flowing temperature factor,
supercompressibility factor, and compressibility ratio
factor "s" for use in computing the volume of Gas
delivered through a meter, the flowing gas temperature
for only the period(s) of time that Gas was flowing
through the meter shall be used.
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