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Title: Reducing Measurement Uncertainty In Process Gas Quality Measurements
Author: Dr. Darin L. George
Source: 2010 International School of Hydrocarbon Measurement
Year Published: 2010
Abstract: The general term gas quality is used to refer to many different measures of the content of a natural gas stream. Common measures of gas quality include heating value water vapor content hydrogen sulfide or total sulfur content levels of inert gases, such as CO2 and hydrocarbon and water vapor dew points. These values determine how the gas stream must be handled, whether it can be used efficiently by customers, and whether the potential exists for damage to end-user equipment or pipelines that carry the gas stream. The presence of water and hydrogen sulfide in a gas stream, for instance, can create sulfuric acid and pit the walls of a carbon steel pipeline. Shifts in the heating value and specific gravity of the gas can lead to poor furnace performance, or require adjustments of gas-fired industrial equipment. High levels of non-hydrocarbon gases, such as nitrogen, will reduce the heating value and make transportation of the gas less economically efficient.




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