Max pressure limits on private hydrants
Max pressure limits on private hydrants
(OP)
We have industrial facilities (power plants) with fire mains with several wet barrel hydrants feed by horizontal fire pumps.
Our local AHJ, the fire department, states that for 2 1/2 hose connections the residual pressure must not excede 100psi, to prevent that a not very skilled fire brigade meet problems with high pressure flows. (We never pass this criteria since most of our pumps are 125-150psi sized for foam equipment, monitors, deluge systems on critical scenarios).
I know from NFPA 14 the pressure limits that governs on building standpipes, but we don´t have a criteria for hydrants or outdoors 2 1/2 connections, I haven´t seen this mentioned in NFPA 24.
Does somebody know something about hydrant hose connection pressure limits?.
Our local AHJ, the fire department, states that for 2 1/2 hose connections the residual pressure must not excede 100psi, to prevent that a not very skilled fire brigade meet problems with high pressure flows. (We never pass this criteria since most of our pumps are 125-150psi sized for foam equipment, monitors, deluge systems on critical scenarios).
I know from NFPA 14 the pressure limits that governs on building standpipes, but we don´t have a criteria for hydrants or outdoors 2 1/2 connections, I haven´t seen this mentioned in NFPA 24.
Does somebody know something about hydrant hose connection pressure limits?.




