Reduced Copper Piping Corrosion in Sprinkler Facilities

Abstract

Copper pipes used in fire sprinkler systems are somewhat superior to steel pipes in terms of corrosion resistance. They have been widely used in apartments since 2010, but their firefighting performance has not been firmly established due to leakage caused by pitting. In order to solve this problem, copper pipes need to be replaced by pipes made of other materials such as STS or C-PVC, which, however, would impose an economic burden on the party responsible for maintenance, as well as economic loss to other relevant parties and inconvenience to residents. Although 27 leakages occurred in the E region in 2018, it was found that the number of incidents was reduced to just one case after an application of corrosion inhibitor. Therefore, for 2 months beginning in October 2020, a second project to reduce piping corrosion was conducted with 2,000 households in five regions nationwide. During this period, the standing fire water of five apartment buildings in the A region was measured as having a pH 8.34–9.08, an ORP -94.9–-135.8 mV, and an EC 0.097–0.137 ms/cm, which indicated a need for improvement. Subsequently, a corrosion inhibitor was poured into the fire water, resulting in improved values of pH 11.13–11.26, ORP -257–-265.5 mV, and EC 4.189–5.769 ms/cm, which demonstrated the effect of preventing pipe corrosion. It was evident that water-soluble silicate was adsorbed on the metal pipe of the anode to form a thin monolayer, which induced basicity by increasing the pH and by decreasing the ORP, which eventually minimized corrosion.

Evaluating Corrosion Resistance of Metal Materials in Fire Productsvia Saltwater Spray Test Under Various Experimental Conditions

“…, Lee Choi (10) 가 분전반에서의 내식성 테스트를 실시하였고 등 , Mun (11) 은 스프링클러 설비에 서의 동배관의 부식억제제를 이용한 부식방지에 관한 연구를 수행하였다 한편 해외에서는 . , Carpen (12)…”

A Study on the Improvement of the Utilization of Pipeline Connection for the Supply of Fire Extinguishing Water

“…의 소방 배관 형상에 따른 배관 내진해석에 관한 연구 등 , Choi (2) 의 소방 배관 동파 방지용 열선의 위치 선정을 위한 비정상 열전달 수치해석에 관한 연구 그리고 등 , Mun (3) 의 스프링클러 설비의 동배관 부 식 개선에 관한 연구 등이 있다 또한 연결송수관설비 송수구 . , 와 관련된 연구로는 등 Kim (4) 의 초고층 건축물 연결송수관설 비의 효과적 활용에 관한 실험 연구, Lee (5) 의 상가건물 소방용 연결송수관설비 송수구의 개선방안에 관한 연구 그리고 , Lee (6) 의 아파트 화재진압용 연결송수관설비 송수구의 개선방안에 관한 연구 등이 있다 그러나 연결송수관설비 송수구 등 소방 .…”