Dry Pipe Fire Sprinkler Systems Inspection Testing Maintenance

Dry pipe valves are used in areas subject to freezing temperatures.

Dry pipe fire sprinkler systems inspection testing maintenance.

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. Inspection testing and maintenance of dry pipe valves and dry pipe systems are critical to maintaining effective fire protection. Instead the water delivery time is compared to results from the original acceptance test which was performed right after the system was installed. An nfpa 25 inspection applies to a properly installed fire sprinkler system only and is the standard for inspecting not for installing.

The next article in a series discussing fire sprinkler system inspection testing and maintenance is published in asse fireline. Dry sprinkler systems protect people and property from fires in areas prone to freezing but this important benefit comes with some strings attached. 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. Maintenance intervals other than preventive maintenance are not provided as they depend on the results of the visual inspections and operational tests.

Since dry sprinklers are more complicated than wet sprinkler systems and regularly exposed to harsh environments extra care is required to maintain reliable fire protection. During a complete fire sprinkler system test the technician should perform physical checks on all parts of your fire sprinkler system. For foam water sprinkler systems in aircraft hangars refer to the inspection test and maintenance requirements of nfpa 409 table 11 1 1. 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.

An inspection is a visual inspection performed from the ground.