How far must smoking be prohibited from the purging operation?

Prohibiting smoking during a purging operation is a critical safety measure to prevent fire hazards associated with flammable gases. The correct distance for this prohibition is 25 feet. This distance is established based on safety regulations, recognizing that flammable gases can potentially escape during purging and create an explosive atmosphere in the surrounding area. Having a safe distance ensures that no ignition sources, like cigarettes, can ignite accumulated gases, thereby reducing the risk of fires or explosions.

Conversely, the other suggested distances of 10, 15, and 20 feet may not provide adequate safety margins for the hazards associated with LP gas operations, which necessitate a greater precaution due to the properties of the gas involved. By implementing a 25-foot prohibition, operational safety is prioritized, ensuring a more secure environment for both workers and the surrounding public.