Dry Pipe Fire Sprinkler Systems Inspection Testing Maintenance

Inspection testing and maintenance of dry pipe valves and dry pipe systems are critical to maintaining effective fire protection.

Dry pipe fire sprinkler systems inspection testing maintenance.

Systems other than those which have been properly installed are beyond the scope of nfpa 25. As part of the minimum inspection testing and maintenance requirements for wet pipe systems and portions of dry pipe systems containing water it is critical to ensure that the piping is protected against freezing conditions. Maintenance intervals other than preventive maintenance are not provided as they depend on the results of the visual inspections and operational tests. An inspection is a visual inspection performed from the ground.

Specific requirements relating to the inspection testing and maintenance of wet and dry pipe fire sp rinkler systems can be found in chapters 5 13 14 and 15 of nfpa 25. For foam water sprinkler systems in aircraft hangars refer to the inspection test and maintenance requirements of nfpa 409 table 11 1 1. An nfpa 25 inspection applies to a properly installed fire sprinkler system only and is the standard for inspecting not for installing. During full flow tests dry sprinkler systems don t have to deliver water to the inspector s test connection within the 60 second timeframe generally required by nfpa during a fire.

These checks include water flow tests fire pump tests antifreeze concentration tests in applicable systems alarm tests and trip tests of dry pipe deluge and pre action valves. During a complete fire sprinkler system test the technician should perform physical checks on all parts of your fire sprinkler system. Instead the water delivery time is compared to results from the original acceptance test which was performed right after the system was installed. Dry pipe valves are used in areas subject to freezing temperatures.

Specific requirements relating to the inspection testing and maintenance of fire pumps can be found in chapter 8 of nfpa 25.