Aviation
Protect high-value assets through rapid fire detection and suppression.
Hangar
When aircraft are parked in hangars for maintenance, repair, or storage, they are typically not fully fueled. Nevertheless, a residual quantity of fuel may still remain onboard. Consequently, maintenance and repair activities increase the risk of fire due to the presence of potential ignition sources. Furthermore, the dimensions and height of hangars impose specific requirements on fire‑protection strategies. Hangar construction must comply with HH‑class (high‑hazard) fire‑safety codes and be designed in accordance with NFPA 409 and BS 13565‑2, with customized solutions tailored to the type of hangar door and the specific aircraft model.
Items to be protected:
Flammable liquids (such as fuel) inside the aircraft
Fire Protection Technical Requirements
Fire‑fighting foam is a critical component of hangar fire protection, and high‑expansion foam generators are often integrated into the fire‑suppression system. These units are mounted at floor level and supplied with foam concentrate via a foam proportioning mixer. In the event of a fire, the hangar must achieve full foam coverage within three minutes, with the foam layer extending to a height of 1.5 meters above doors and walls.
Fires can occur anywhere within the hangar, but the most likely ignition source is beneath the aircraft wings, where leaked fuel may accumulate. Consequently, fire‑suppression strategies must account for all potential scenarios and include protective measures for the area under the wings. When the wing surface exceeds 280 square meters, such protection is often mandated by law. As a result, in the event of a fire, firefighting foam is delivered in a targeted spray rather than a blanket application, significantly reducing post‑extinguishment cleanup costs.
Infrared Early Fire Detection System
Fire detection systems enable the early localization of fire sources. Continuous heat monitoring allows for determining whether the fire has been extinguished or if further action is required.
Remotely control the fire suppression monitor to extinguish fires.
Remote‑controlled fire‑suppression monitors integrated into early‑warning fire detection systems can deliver timed suppression within a defined area, operating only until the fire hazard has been eliminated. To protect the area beneath aircraft wings, a combination of oscillating nozzles and remotely controlled spray guns is recommended. Furthermore, FireDos spray guns, featuring an innovative fluid‑optimized elliptical‑flat design—the hallmark of the FireDos compact series—can achieve extended spray ranges.
A reliable foam proportioning mixer supplies liquid to the high-expansion foam generator.
Fixed‑type proportioning mixers deliver a premixed solution steadily to high‑expansion foam generators, producing fire‑extinguishing foam. The all‑mechanical FireDos proportioning mixer maintains a constant mixing ratio across a wide range of flow rates and pressures in the extinguishing water stream, ensuring high reliability. This equipment also allows testing of the mixing ratio without generating a premixed solution—offering a cost‑effective solution.
Fire Risks in Hangars
Maintenance and Repair Operations
Maintenance and repair operations may generate a variety of potential ignition sources, which, when combined with aircraft fuel, pose a serious fire hazard.
Typical Applications
Please be sure to consider the following:
A comprehensive fire protection solution, with particular attention to the risk areas beneath aircraft wings.
Infrared Early Fire Detection System
Remotely control the fire monitoring system to achieve precise fire suppression.
Reliable proportional mixer, supplying liquid to high-expansion foam generators.
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