Experimental Study on the Analysis of Leakage in Aged Fire Doors

Abstract

Aged fire doors may develop leakage cracks owing to damage from long-term use, leading to issues such as declines in the functionality of pressurization systems. This study analyzes the trends of leakage cracks in aged fire doors based on existing research and field surveys and derives the differential pressure and leakage amounts corresponding to each leakage crack via experiments conducted in a full-scale ancillary room. The results indicate that an increase in the number of leakage cracks tends to result in a decrease in the design differential pressure, which thereby prevents the fire door from performing its intended functions. Moreover, the results confirm that an increase in the number of leakage cracks also affects the leakage amounts.