Is oxygen an approved medium for pressure testing a gas line?

Oxygen is not an approved medium for pressure testing a gas line. The primary reason for this is safety. During the pressure testing process, any leaks could potentially mix with combustible materials, leading to a high-risk situation. Oxygen is a highly reactive gas that can support combustion and create hazardous conditions if it comes into contact with flammable materials.

Instead, approved mediums for pressure testing gas lines typically include inert gases like nitrogen and, in some cases, water. These options are far safer because they do not present the same combustion risks as oxygen. Therefore, selecting "false" reflects an understanding of the necessary safety protocols and regulations established for testing gas lines in order to prevent potential hazards.