Chromatograph, equation yield usable field dewpoint prediction

Pipelines can use gas-chromatograph analysis in conjunction with an equation of state to predict hydrocarbon dewpoint in the field. This prediction method provides sufficient data resolution to enable pipeline operators to manage receipt and delivery of gas into their systems to meet hydrocarbon dewpoint specifications of downstream customers.Questar Pipeline Co. monitors its pipeline system in Utah, Wyoming, and Colorado with gas chromatographs and manages the systems based on HDP. Questar used four technicians to conduct a two-phase study on dewpoint at different locations on its pipeline system.Phase I showed agreement of the dewpoint values from the C9+ analyses to the extended analys...

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