Where is the transfer of liquid into containers mounted on vehicles prohibited?

The transfer of liquid propane into containers mounted on vehicles is prohibited within a building due to significant safety concerns. Inside a building, the risk of propane gas accumulation is heightened because buildings can confine gases, leading to a potentially explosive mixture if a leak occurs or if the transfer process generates vapor. Furthermore, enclosed spaces often lack adequate ventilation, increasing the danger of fire and explosion.

In contrast, locations such as open land or outdoor areas generally allow for better ventilation, which helps disperse any potential leaks or vapor. Weather shelters may still provide some level of risk but are typically designed to manage outdoor conditions. Therefore, emphasizing the prohibition of transfer activities inside a building underscores the importance of safety measures in preventing hazardous situations associated with propane transfer.