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Title: Regulator Freezing - Occurrence And Prevention
Author: Wade O. Hetrick
Source: 1975 Appalachian Gas Measurement Short Course
Year Published: 1975
Abstract: Water in some form is present in all natural gas and is the basic ingredient of the hydrate formations responsible for most regulator freezing. In order to cope effectively with the problem of regulator freezing, it is necessary to understand the nature of the water-gas relationship: the conditions favorable to the formation of hydrates and the basic techniques used to prevent hydrates from forming. When water is present in natural gas in the liquid form, it is called free water. When it is present in a diffused form or gaseous state, it is called water vapor. The amount of water vapor a gas can hold is dependent on the temperature and the pressure. If the pressure remains constant, the ability of the gas to hold water vapor increases as the temperature increases. If the temperature remains constant, the ability of the gas to hold water vapor increases as the pressure decreases. See Figure I.

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