Fire resistance tests of a glass pane with down-flowing water film

Based on the ISO 834-1 standard code, this study examined the fire insulation and fire integrity properties of two full-scale glass partes (a common tempered glass pane and a non-heat-resistant fireproof glass with the same dimensions 120 cut x 240 cm x 0.5 cm) covered with a water film in a standard full-scale 3 m x 3 m door/wall refractory furnace. For fire testing in the standard furnace, a specialized testing frame was devised to accommodate the multi-nozzle spray system with a buffer box, which generated a down-flowing water film on the glass surface. When a water film with adequate thickness (similar to 1.5 mm) and flowing speed (similar to 0.7 m/s) was established on a glass pane, the evaporative latent heat of the water film could be used to protect the glass from melting or breaking in a fire. In this study, the period of fire insulation and integrity could be extended to 100 minutes and the temperature of the glass surface was kept below 210 degrees C. Thus, the Substitution of a common non-fire-resistant tempered glass with water film for fireproof glass or overhead doors has been proven workable.