What document references the maximum operating pressure for Extra Hazard sprinklers?

The document that specifies the maximum operating pressure for Extra Hazard sprinklers is NFPA 13. This standard focuses specifically on the installation of sprinkler systems and establishes the criteria for various types of sprinkler systems, including those designed for different hazard classifications like Extra Hazard.

NFPA 13 outlines the design, installation, and maintenance requirements necessary for effective fire protection through sprinkler systems. It provides detailed information regarding the performance criteria, including maximum operating pressures, which are essential for ensuring that the sprinkler systems function correctly in a fire event. This ensures that the systems are capable of delivering the required water flow and pressure to effectively suppress a fire in scenarios classified as Extra Hazard, where the risk of fire is higher due to the presence of combustible materials.

While other standards like NFPA 20 focus on pumps for fire protection and NFPA 25 is concerned with the inspection, testing, and maintenance of water-based fire protection systems, they do not set the specific maximum operating pressures relevant to sprinkler types. The International Building Code (IBC) provides general building regulations but does not delve into the specific operational parameters of sprinkler systems. Therefore, NFPA 13 is the definitive source for such requirements.