What is necessary for a delivery hose assembly to prevent usage in unloading?

A delivery hose assembly must be free from physical damage to ensure safe and proper usage during unloading. Ensuring the absence of damage is critical because any compromise in the integrity of the hose, such as cuts, abrasions, or leaks, can lead to dangerous situations like gas leaks or even explosions. It is essential to inspect the hose for any signs of wear or damage before use, as these could pose significant risks to both personnel and property during the transfer of liquefied petroleum gas.

While visual inspections, proper markings, and regular maintenance are important aspects of hose safety and operational procedures, they do not specifically prevent usage in unloading if the hose is physically damaged. A hose that shows visible signs of damage, regardless of inspection or maintenance, is not safe for use and should be taken out of service immediately. This emphasis on physical integrity helps to uphold safety standards and mitigate the risk of accidents.