What pressure should Co2 fire extinguishers with an ICC3 cylinder specification be tested to?

The appropriate test pressure for CO2 fire extinguishers with an ICC3 cylinder specification is 3000 psi. This pressure ensures that the cylinder can safely handle the stresses it may encounter during its operational life, as well as the intense conditions during a fire emergency.

Testing to this specific pressure is significant because it validates the integrity and safety of the cylinder material and construction. It allows for a buffer against any potential weaknesses, ensuring the extinguisher remains functional when needed.

Using a lower test pressure may not adequately assess the cylinder’s ability to withstand high stress, potentially resulting in dangerous situations where the extinguisher might fail during use. Thus, testing at 3000 psi is the established standard to ensure reliability and safety for CO2 extinguishers.