Understanding hydraulic requirements in NFPA 13D

By Fred Durso, Jr. A common question we receive through NFPA’s technical advisory services for NFPA 13D, Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, involves the hydraulic calculation of the system. Unlike NFPA 13, Installation of Sprinkler Systems, NFPA 13D does not require full-blown hydraulic calculations that assess friction loss of every fitting and linear foot of pipe. One of the goals of the NFPA 13D technical committee is to promote the inclusion of systems in both new construction and retrofit installations. As such, requiring a complicated and time-consuming hydraulic calculation procedure would add cost to the project and…

Source:: NFPA – Fire Sprinkler Initiative


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