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Title: REGULATOR FREEZE PROCTECTION
Author: AUSTIN SORENSEN
Source: 2019 Western Gas Measurement Short Course
Year Published: 2019
Abstract: Freezing can be a problem in both transmission and distribution systems in the natural gas industry. This problem can affect a Companys ability to deliver gas on demand. Damaging its reputation and its license to operate in the publics eye. It typically occurs when there is a reduction of pressure at natural gas regulating stations. The problem can be complex so there are multiple solutions to address the problem. The four primary contributors to the problem are pressure drop, presence of water, hydrocarbon liquids, and ambient temperature. Hydrocarbon dew points also need to be considered when dealing with hydrate issues. The Joule-Thompson (JT) effect is what causes the hydrate to form with pressure drop. As the pressure of a gas drops, so does the temperature. For every 100 psi of pressure drop, the temperature of natural gas will drop approximately 7 degrees F as a good rule of thumb.

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