초록
최근 건축물의 대형화, 복잡화로 인하여 화재 발생 시 그 피해가 증가하고 있어 수계소화설비에서 스프링클러설비의 중요성이 확대되고 있다. 소방용 배관재로는 탄소강관(일반배관용·압력배관용), CPVC관, 동관, 스테인리스강관 등이 있으며, 소방용 배관으로 널리 사용되고 있는 강관배관 및 CPVC관에 대하여 배관의 노화를 고려한 부식계수 적용 시 말단헤드에서의 유량과 압력을 분석하기 위해 PIPENET 수리계산프로그램을 사용하여 수계시스템의 신뢰성을 분석하였다. 강관을 적용하였을 경우 배관 구경이 동일한 조건에서 20년경과(C값 90)후 지하 1층에 설치된 펌프에서의 정격유량은 10% 이상 감소하였으며, 말단헤드에서의 압력과 유량은 각각 30%, 16.5% 이상 감소하여 소방시설의 신뢰성 확보에 문제가 있는 것으로 확인되었다. 또한 30년(C값 80) 경과 시 펌프에서의 정격유량은 15% 이상 감소하였으며, 말단헤드에서의 압력과 유량은 각각 42%, 24% 이상 감소하는 것으로 결과 값이 도출되었다.
With the recent enlargement and complication of buildings, damage caused by the incidents of fires breaking out are escalating. Consequently, the use of sprinkler facilities is increasing among water-based fire extinguishing systems. Piping materials used in fire prevention systems include carbon steel (for general or pressure pipeline), CPVC, copper, and stainless-steel. Among these, the steel and CPVC pipes, which are commonly employed in fire prevention, were considered for testing the reliability of the water-based systems. This analysis was performed using the PIPENET software to perform hydraulic calculations in order to examine the flow and pressure at the terminal head when the corrosion coefficient was applied; this coefficient was applied considering the aging of pipes. Assuming a uniform pipe diameter in the steel pipes, the rated flow in the pump installed on the first floor of the basement was reduced by over 10% after 20 years had passed (C value of 90); moreover, the reduction in pressure and flow at its terminal head exceeded 30% and 16.5%, respectively. The results indicate that it is difficult to ensure the reliability of these fire prevention facilities. Furthermore, according to our estimation, considering 30 years had passed (C value of 80), the rated flow of the pump was reduced by over 15%, and the corresponding reduction in pressure and flow at its terminal head exceeded 42% and 24%, respectively.
