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UL 2167-2017 pdf free download
UL 2167-2017 pdf free download.Water Mist Nozzles for Fire Protection Service.
25.4.1 Coated and uncoated nozzles shaH be resistant to sail spray when conditioned in accordance with
25.4.2 — 25.4.4. Following exposure, the water flow rate of the open nozzles at their minimum operating or standby pressure shall be within 5 percent of the value specified in the manufacturers design and installation instructions. For automatic nozzles, five nozzles shall operate when tested at their minimum operating or standby pressure as described in 16.1 — 16.4. The remaining five samples shall comply with the requirements of 28.2.
25.4.1 effective December 27, 2004
25.4.2 Ten nozzles are to be exposed to a salt spray within a fog chamber. During the corrosive exposure, the outlet of open nozzles is to be sealed as specified in the manufacturer’s design and installation instructions and the inlet is to be sealed by a plastic cap after the nozzles have been filled with deionized water. The salt solution is to be a 20 percent by mass sodium chloride solution in distilled water, The pH is to be between 6.5 and 7.2 and the density between 1.126 g/ml and 1.157 g/ml when atomized at 35°C (95°F). A means of controlling the atmosphere in the chamber is to be provided. The specimens are to be supported in their normal operating position and exposed to the salt spray (fog) in a chamber having a volume of at least 0.43 m3 (15 ft3) in which the exposure zone is to be maintained at a temperature of 35 ±2°C (95 ±3.6°F). The temperature is to be recorded at least once per day and at least 7 hours apart except weekends and holidays when the chamber is not normally opened. Salt solution is to be supplied from a recirculating reservoir through air-aspirating nozzles, at a pressure between 0.7 bar (10 psi) and 1.7 bar (24.6 psi). Salt solution runoff from exposed samples is to be collected and is to not return to the reservoir for recirculation.
2542 effective L)ecember 27, 2004
25.4.3 Fog is to be collected from at least two points in the exposure zone to determine the rate of application and salt concentration, The fog is to be such that for each 80 cm2 (12 in2) of collection area, 1 — 2 ml (0.03 — 0.07 fI oz) of solution is to be collected per hour over a 16 hour period. The salt concentration is to be 20 ±1 percent by mass.
254.3 effective December 27, 2004
25.4.4 The nozzles are to withstand exposure to the salt spray for a period of 10 days. After this period, the nozzles are to be removed from the fog chamber and dried for 4 to 7 days at a temperature of 20 — 25°C (68 — 77°F) in an atmosphere having a relative humidity not greater than 70 percent. Following the drying period, the water flow rate of the open nozzles at their minimum flowing pressure is to be within 5 percent of the value specified in the manufacturer’s design and installation instructions. For the automatic nozzle samples, five nozzles are to be tested at the minimum flowing or standby pressure In accordance with 16.1 and five nozzles are to be tested in accordance with 28.2.
25.4.4 effective December 27, 2004
25.4.5 For nozzles intended for corrosive atmosptieres, the nozzles are to be subjected to the tests specified in 25.4.1 — 25.4.4 except that the duration of the salt spray exposure shall be 30 days.
25.4.5 effective December 27, 2004.UL 2167-2017 pdf free download.
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