What safety measure must be observed regarding smoking and open flames near an ASME container?

The requirement of maintaining a distance of at least 15 feet from an ASME container when it comes to smoking and open flames is crucial for safety. This measure is in place to mitigate the risk of fire or explosion, as liquid propane gas (LPG) is highly flammable.

The reason for the 15-foot distance is based on the characteristics of propane and the behavior of flames. In the event of a leak, propane can accumulate in the vicinity of the container, and if it ignites due to an open flame or a spark from smoking, it could lead to dangerous consequences. By keeping a safe distance, the chances of a fire spreading or an explosive situation arising are significantly reduced.

Furthermore, this regulation is consistent with safety standards and guidelines put forth by organizations that govern hazardous materials and public safety, ensuring that handling and usage of LPG is conducted with a priority on preventing accidents. Therefore, maintaining this distance serves as an essential practice for anyone working near or with ASME containers to ensure safety in operations involving flammable gases.