Nozzle is a device used to deliver the liquid agent with a specific flow rate and stream pattern, it shall have the followings spec.:. ![]() Wet Chemical Extinguishing System Components 1- Detectors The hazard protected by these systems should limited as to type and size based on actual fire test, limitations on hazards that are permitted to be protected by these systems are contained in the manufacturer’s design, installation, and maintenance manual, which is part of listing of the system. pipe lengths and number of fittings should be permitted to be expressed in equivalent feet (meter) of pipe. ![]() So the system should listed by a testing laboratory, max. We can define this system as a pre-engineered system (NFPA 17A 3.3.13), which mean having predetermined:.
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