When approaching a burning flammable liquid vessel, which combination of hose streams should be used?

Using two 45-mm (1 3/4-in) hose streams is advisable when approaching a burning flammable liquid vessel due to several important factors. This size of hose provides a balance between flow and maneuverability, which is essential in fire suppression scenarios involving flammable liquids.

The 45-mm hose stream offers adequate water flow to cool the vessel and suppress flames without being overly cumbersome. This diameter allows for a sufficient volume of water to combat the intense heat and suppress the fire effectively. The combination of two streams enhances the capability to control the fire from different angles, increasing the chances of extinguishing the flames and preventing fire spread.

When dealing with flammable liquids, the fire's characteristics can rapidly change, and quick, effective responses are crucial. The moderate flow rate of the 45-mm hoses allows firefighters to maintain mobility while effectively applying water to the fire, targeting both the flames and the surrounding area that could catch fire.

In scenarios where larger diameter hoses might be considered, such as the 65-mm hoses, they can provide larger volumes of water but may also be heavier and less maneuverable, which can impede firefighting efforts in dynamic environments. Adequate training and practice with the chosen hose sizes facilitate effective firefighting tactics, making the