It is well known that the pressure rating indicates the maximum pressure an air hose can withstand. However, several factors can influence this rating. Understanding these factors will help you choose the right hose, ensuring both safety and efficiency.

Hose structure:

The manufacturing method of a hose directly affects its strength. The structure of a hose primarily depends on the materials used and the number of reinforcing layers. Therefore, if a hose is made with stronger materials and more reinforcement layers, it can withstand higher pressures—and as a result, its rated pressure will also increase.

Hose diameter:

The width of the hose is crucial. The smaller the diameter, the greater the pressure it can typically handle—this is because the surface area over which the pressure acts is reduced. However, an excessively large diameter may actually lower the pressure rating.

Temperature:  

Air hoses have limitations when it comes to both high and low temperatures. Extreme heat can weaken the hose material, while extreme cold makes the hose more rigid and prone to cracking. As a result, both conditions reduce the hose's pressure rating.

Air Quality:  

The type of air flowing through the hose is critical. Moisture, oil, or contaminants in compressed air can degrade the hose material over time. As a result, the hose's strength diminishes as its pressure rating decreases.

Hose length and curvature:  

When the hose is longer, the internal pressure may drop slightly. This happens because air has to travel a greater distance. As a result, longer hoses reduce the rated pressure. Bending also plays a crucial role, as sharp bends or twists can obstruct or slow down airflow—directly leading to a decrease in the rated pressure.