What should be the primary concern with filling LP gas containers?

The primary concern with filling LP gas containers revolves around the issue of overfilling, which can lead to hazardous pressure conditions within the container. LP gas (liquefied petroleum gas) expands when heated, and if a container is overfilled, there may not be enough space for this gas to expand safely. This lack of expansion room can result in excessive pressure, which poses a risk of leaks, potentially hazardous situations, and even explosions if the pressure exceeds the container's safety limits. Therefore, it is vital to follow proper filling procedures and ensure that there is adequate vapor space in the container to accommodate thermal expansion without compromising safety.

Other options may reflect misconceptions about filling practices or underestimate the importance of temperature variations and safety regulations. Understanding the correct operational practices is crucial for maintaining safety in handling and storing LP gas.