What shall the bursting pressure of a fire hose be in relation to the static water line pressure?

The bursting pressure of a fire hose is designed to be significantly higher than the static water line pressure to ensure the safety and reliability of the hose under operational conditions. Fire hoses must withstand various stresses, including the pressure generated when water is pumped through them, which can significantly exceed the static pressure of the water supply.

The requirement for the bursting pressure to be at least four times the static water line pressure provides a substantial safety margin. This safety margin accounts for factors such as pressure surges, irregularities in water flow, and possible obstructions in the hose that could lead to increased pressure. By ensuring that the bursting pressure is four times higher, the hose is less likely to fail during use, thus protecting the firefighting personnel and maintaining effective water delivery.

In practical terms, if the static water line pressure is relatively low, the bursting pressure will still be sufficiently high to handle emergency situations without risk of rupture. This is crucial in firefighting scenarios where seconds can matter, and the reliability of equipment can significantly impact the outcome of an emergency response.