Trunkline LNG Company, LLC
Second Revised Volume No. 1-A
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Effective Date: 08/01/2003, Docket: RP03-535-000, Status: Effective
Original Sheet No. 109 Original Sheet No. 109 : Effective
GENERAL TERMS AND CONDITIONS
(Continued)
13. MEASUREMENT (Continued)
(C) The density of the LNG shall be calculated using the
revised Klosek and McKinley method.
(D) The temperature of the LNG contained in the tanks of
any Shipper's Vessel shall be determined by using the
arithmetic average of the temperature indicated by
special thermo-couples or resistance thermometers
spaced at various locations from top to bottom of
each tank with an accuracy of plus or minus two-
tenths of a degree centigrade. Such temperatures
shall be either logged or printed.
(E) Samples of the LNG shall be taken with a frequency
adequate to assure a representative analysis of the
LNG being loaded or unloaded, at a suitable point
between the receipt discharge Point and TLNG's
storage facilities. The sampling device shall be
such as to permit the total and continuous
vaporization of a quantity of LNG sufficient for the
taking of a gaseous sample representative of the LNG
then being received or delivered. Such samples shall
be analyzed by means of a suitable gas chromatograph.
An analysis or the average of such analyses shall
determine the molecular composition of the LNG. A
calibration of the chromatograph utilized shall be
performed before the analysis of the samples taken
from each unloading. Representatives of Shipper
shall have the right to be present, but the absence
of a duly summoned representative of Shipper shall
not prevent the carrying out of calibration and
sampling. Such calibration shall be effected with
the aid of a gaseous mixture having a known
composition closely similar to the vaporized LNG
being measured.
(F) The Gross Heating Value of LNG shall be calculated on
the basis of its molecular composition and of the
molecular weights and the Thermies per kilogram of
each of its components. The values of physical
constants to be used for such calculations shall
conform to those contained in the most current
publications of the National Bureau of Standards of
the United States.