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http://dx.doi.org/10.7731/KIFSE.2015.29.3.006

Performance of Decompression Orifices Attached to Indoor Hydrant Discharge Outlets  

Park, Bong-Rae (Mir Engineering. Co., Ltd.)
Lee, Meng-Ro (Dept. of Fire Administration, Dong-sin Univ.)
Jang, Kyung-Nam (Dept. of Fire Administration, Dong-sin Univ.)
Baek, Eun-Sun (Dept. of Fire Administration, Dong-sin Univ.)
Publication Information
Fire Science and Engineering / v.29, no.3, 2015 , pp. 6-12 More about this Journal
Abstract
Indoor hydrant facilities are used to fight initial fires before more intense fire extinguishing activities. Fire extinguishing facilities should ensure good fire extinguishing performance and the safety of users. Indoor hydrant facilities are mostly installed in buildings and facilities, and users must manipulate valves, hoses, and nozzles manually. When the discharge pressure is higher than 0.70 MPa, there is a high possibility that problems with manipulation and hose breakdown can occur. To prevent these problems, a method to attach orifice-type decompression valves to the angle valves of indoor hydrant discharge outlets has frequently been used for decompression methods. However, the decompression performance was reduced due to structural problems of the decompression valves over time. Accordingly, based on three-stage initial pressures, applicable pressure ranges were selected by measuring the decompression performance according to the diameter of the decompression orifices. Based on the data, stable decompression valve models are proposed. These models have the lowest decrease in decompression performance, regardless of time.
Keywords
Indoor hydrant; Decompression; Decompression valve;
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Times Cited By KSCI : 1  (Citation Analysis)
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