Hydrocarbon dewpoint is the temperature at which the heavier hydrocarbons condense out of the gas stream. It is pressure dependent, and pipeline specifications are typically based on maximum hydrocarbon dewpoint. In our experience, most pipelines are calculating the dewpoint from chromatographic gas analysis as opposed to actually performing field tests. This is an acceptable practice so long as the assumptions for determining the C6 plus fraction of the gas are consistent with those used for Btu determination. In some cases, it may be necessary to perform an extended analysis to determine the actual composition of this aggregate component.

We welcome the opportunity to provide our expertise in determining or verifying the hydrocarbon dewpoint of your gas purchases or deliveries. In most cases, just furnish us with a copy of the gas analysis that the dewpoint is based on and we will perform an independent calculation and review. If any discrepancies occur, you can rely on Coastal Flow's professional and technical staff to represent you.
 
For more information, please contact us at cfminfo@coastalflow.com, 281-282-0622, or toll free at 1-800-231-9741.