We have an account that failed the five year FDC hydrostatic test. The Fire Department Connection is a remote, freestanding FDC. The Fire Marshal is claiming that there is no leakage, however, will not give a pass or fail.
NFPA 25 (2017) and others reference hydrostatic tests.
188.8.131.52 hydrostatic test 200 psi for 2 hrs or at 50 psi in excess of the maximum pressure where maximum pressure is in excess of 150 psi every five years. (manual standpipe systems and semi-automatic dry standpipe systems, including piping in the FDC)
Annex 184.108.40.206* that mentions a minimum leakage existing under test pressure.
Section 13.8.5 FDC five year hydrostatic testing shall be tested at 150 psi for 2 hrs. There is no mention of minimal leakage allowed.
What is this allowable leakage?
NFPA 24 (2010) Private Fire Mains & Their Appurtenances Section 10.10.2.2.1 requires 200 psi or 50 psi in excess of the system working pressure whichever is greater and maintain that pressure at +/-5 psi for 2 hrs.
Is that my allowable leakage, so that if we lose less than 5 psi or gain no more than 5 psi for 2-hours, that we pass? Wasn't sure if the existing 5-year hydrostatic for underground has leakage that is measured differently from an inside hydrostatic test.
Submitted anonymously and posted for discussion. Discuss This | Submit Your Question | Subscribe
Subscribe and learn something new each day:
Top June '21 Contributors
Get 100 Days of Free Sample Questions right to you!
PE PREP SERIES