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Title: Techniques Of Composite Gas Sampling
Author: Josh H. Welker
Source: 2004 International School of Hydrocarbon Measurement
Year Published: 2004
Abstract: What is composite gas sampling? In ASTM Designation: D 5287-92: Composite gas sampling is the use of a mechanical system to compile representative samples in such a way that the final collection is representative of the composition of the gas stream. In ISO/DIS 10715: Composite sampling is accumulating a series of spot samples into one composite sample. Today, two major groups within the natural gas industry take samples. These are the gas measurement groups and the corrosion protection groups. The gas measurement groups need samples to get the British Thermal Unit (BTU) value and the specific gravity of the gas. The corrosion groups need samples to determine what is in the flowing fluid so that they can prevent the pipeline and associated instruments from corroding. Before participating in composite gas sampling, a user needs to know what a representative sample is. An overview of the components used and an understanding of the set up of a sampling system are also needed in order for a user to properly perform composite gas sampling techniques.

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