PN 305200901, Rev YT
Calculation of Dewpoint Values for Hydrocarbon
Streams
The calculation of dewpoint values for hydrocarbon streams is covered by
several standards. Because there are dierences between the dewpoint values
calculated with the older North American standard (ASTM D1142, which is
based on the work published in IGT Research Bulletin #8) and the new Europe-
an standard (ISO 18453, which is based on the work presented in GERG-Water
Correlation: GERG Technical Monograph TM14, 2001), AMETEK has provided a
means of using either method in the 3050-OLV product. Specically, in the Gas
List we have cited two separate entries for natural gas. The rst entry is labeled
“Natural Gas”, and will provide dewpoint/frostpoint values consistent with
ASTM D1142. The second entry is labeled “Natural Gas GERG”, and will provide
dewpoint/frostpoint values consistent with ISO 18453. All other aspects of ana-
lyzer performance are identical for both of the two natural gas listings.
1-6 | 3050-OLV Moisture Analyzer
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