What minimum strength criteria must a vapor hose meet?

A vapor hose used in tanker operations must meet several important criteria to ensure safety and functionality. The minimum strength criteria are in place to handle various operational pressures and to prevent failure during use.

Firstly, the maximum allowable working pressure is 10 PSI, which indicates the highest pressure that the hose can safely operate under without risk of failure. This ensures that during the transfer of vapor, the hose can endure typical working conditions without leaks or ruptures.

Secondly, the hose must be able to withstand a vacuum without collapsing, specified as -1 PSI. This is crucial during scenarios in which the internal pressure of the hose may drop significantly, such as during vapor recovery or when the tank's pressure is decreased. Proper construction ensures the hose maintains its shape and integrity under such conditions.

Lastly, the design bursting pressure of 15 PSI indicates the maximum pressure that the hose can tolerate before it fails catastrophically. This provides a safety margin beyond the maximum working pressure, allowing for unexpected spikes in pressure that might occur during operation.

Taken together, these criteria establish a comprehensive standards basis for vapor hoses, ensuring they are safe, reliable, and suited for the stressful conditions typically encountered in tanker operations. Meeting all of these criteria ensures that the vapor hose will function effectively over its service