How should purge end points be monitored?

Monitoring purge end points with a combustible gas indicator (CGI) is essential because it provides a precise and reliable means to detect the presence of combustible gases in the atmosphere. A CGI measures the concentration of flammable gas in the air, which ensures that the area is safe and free of hazardous levels of gas before proceeding with work. Using a CGI minimizes the risks associated with gas leakage and helps maintain compliance with safety regulations.

Other methods of monitoring, such as relying on smell or visual inspection, are not effective because they can miss identifying gas concentrations that may not be detectable by these means. Employee observation, while useful for general awareness, does not provide the quantitative data necessary for ensuring safety during operations involving gas piping. Thus, using a CGI is the optimal approach to ensure a thorough and accurate assessment of purge end points.