PD ISO/TR 12148:2009
Current
The latest, up-to-date edition.
Natural gas. Calibration of chilled mirror type instruments for hydrocarbon dewpoint (liquid formation)
Hardcopy , PDF
English
31-03-2009
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Performance characteristics of automatic weighing
method in accordance with ISO 6570:2001
5.1 Working principle
5.2 Functional requirements
5.3 Measurement uncertainty
6 Performance requirements for a chilled-mirror-type
instrument for hydrocarbon-dew-point determination
6.1 Working principle
6.2 Precision
7 Requirements/Points of interest to carry out a calibration
7.1 Process gas
7.2 Sampling system
7.3 Selection of the PHLC reference value
7.4 Compositional range of gases covered by the calibration
procedure
7.5 Calibration interval
8 Execution of calibration procedure
8.1 General
8.2 Method A - Change in trip point value
8.3 Method B - Direct change of dew point value
8.4 Which method should be used?
Annex A (informative) - Condensation behaviour of natural
gas
Annex B (informative) - Example of a hydrocarbon-dew-point
analysis
Annex C (informative) - Examples of a calibration
Annex D (informative) - Performance of different types of
chilled-mirror instruments for hydrocarbon dew
point determination
Bibliography
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