Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Description of a continuous LNG sampling system
5 Description of a discontinuous LNG sampling system
6 Characteristics of the test rig
6.1 Description of the test rig
6.2 Measurement required
7 Suitability tests
7.1 General requirements of test performance
7.2 Operating procedure
7.3 Calculation of suitability criteria for the
tested sampling system
8 Suitability criteria for the LNG sampling system
9 Test report
Annex A (informative) Continuous LNG sampling system
Annex B (informative) Discontinuous LNG sampling system
Annex C (informative) Thermodynamic conditions for the
transformation of LNG into natural
gas
C.1 - General remarks
C.2 - Example of characteristic points
Annex D (normative) Test rig
Annex E (normative) Means required to evaluate the test rig
E.1 - General remarks
E.2 - Measuring devices
E.3 - Layout of measuring devices in test rig
Annex F (normative) Means required to evaluate a continuous
LNG sampling system
F.1 - General remarks
F.2 - Measuring devices
F.3 - Layout of measuring devices in the tested
sampling system
Annex G (normative) Means required to evaluate a
discontinuous LNG sampling system
G.1 - General remarks
G.2 - Measuring devices
G.3 - Layout of measuring devices in the tested
sampling system
Annex H (normative) Method of calculation of the accuracy
of the test rig
H.1 - Mean values of physical properties derived from
the analysis of the reference gas
H.2 - Calculation of the relationship of the physical
property with time of the reference gas
H.3 - Mean value of a physical property of the
reference gas
H.4 - Random error on a value of the reference gas
H.5 - Random error on all values of the reference gas
H.6 - Example of calculation
Annex J (normative) Method of calculation of the accuracy of
a continuous LNG sampling system
J.1 - Deviation in relation to reference gas, of the
physical property X derived from gas analyses
obtained with the tested sampling system
J.2 - Random error of the tested sampling system
J.3 - Systematic error of the tested sampling system
J.4 - Statistical test on systematic error
J.5 - Example of calculation
Annex K (normative) Method of calculation of the accuracy of
a discontinuous LNG sampling system
K.1 - Calculation of the regression equation of the
reference gas
K.2 - Deviation of physical property X from regression
equation
K.3 - Random error of the tested sampling system
K.4 - Systematic error of the tested sampling system
K.5 - Statistical test on systematic error
K.6 - Example of calculation