OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 37 Oil and Gas Wells

Section 784 Gas sample containers

Gas samples are used to determine the physical properties of the gas from a specific well. Because each well has its own unique characteristics, sampling procedures vary from well to well. There are manual methods such as purging at reduced pressure, fluid displacement, air displacement, floating pistons and vacuums and automatic sampling devices that allow gas to flow into a container over a certain period of time at a constant rate.

Regardless of the method, gas sampling involves handling a flammable product under pressure. Consequently, the sampling equipment, which typically consists of a probe inserted into a pipe, must be leak free and able to withstand all expected pressures. The containers must be contaminant free and purged of all other gases and vapours.