What does "purging" a gas line involve?

Purging a gas line specifically involves the process of removing air or other non-combustible gases from the line to ensure that it is filled with the appropriate fuel gas, typically natural gas or propane. This is crucial for safety and efficiency because the presence of air can create a hazardous mixture that may be flammable or explosive when ignited.

The purging process usually entails flowing an inert gas, such as nitrogen, through the pipeline, which displaces the air and helps prevent the risk of explosion when the line is put into service. Additionally, ensuring that the line is free of unwanted gases helps in achieving reliable gas pressure and optimal combustion when the system is operational.

This practice is essential for compliance with safety regulations and standards in the gas fitting industry. It is a significant step taken before starting the gas flow to ensure the integrity and safety of the gas system.