The hoses attached to CO2 systems are tested in addition to system piping. When conducting a hose test, how long shall the hydrostatic pressure take to reach the test pressure?

• A. Within 30 seconds
• B. Within 60 seconds
• C. Within 90 seconds
• D. Within 120 seconds

Answer: (B)

The test checks how quickly the hose assembly can reach the designated hydrostatic test pressure. The requirement is to bring the pressure up to the test level within 60 seconds. This timing ensures the hose is evaluated under full pressure promptly, so any leaks, bulges, or weak fittings reveal themselves quickly and consistently across all hoses. A slower ramp could mask defects, while a very rapid pressurization could introduce transient effects not representative of normal service. Therefore, reaching the test pressure within one minute is the standard.