Replacement of Hangar’s Fire Services System Achieves Remarkable Results
The EMSD is committed to enhancing the engineering and technical services provided. By forming various think tanks comprising experts from different disciplines, we are able to help our colleagues respond proactively to clients’ needs. As we are familiar with clients’ venues and facilities, we can also offer feasible engineering solutions. Taking the example of reducing the frequency of unwanted fire alarms in the hangar of the Government Flying Service (GFS) Headquarters, we adhered to the customer-oriented principle in providing solutions and completed the installation works of a new fire services system in an expedited period of two months. Now it has been about half a year since its putting into service, and there has been no more unwanted fire alarms. This significant achievement has earned the client’s trust.
Located in an open environment with natural ventilation, the hangar used the conventional point-type heat detectors originally which are easily affected by weather. As a result, unwanted fire alarms occurred several times last year and took place frequently during humid spring season, affecting the operation of GFS. Our Airport and Vehicle Engineering Division worked closely with our Think Tank on Fire Services Installations to come up with a professional recommendation that linear heat detectors should be used, and thus helped the client solve the problem successfully.
The linear heat detectors are installed 15-metre high up on the ceiling of the hangar and connected to the controller mounted on the wall of the hangar so as to send and receive signals. The entire set of linear heat detectors are encased with waterproof polymer which resists humid weather. They also use conductors as sensing elements which can detect the heat at any point along their length. When the temperature reaches 68˚C or above, the insulator of a linear heat detector will melt. Its connecting controller will immediately transmit a fire alarm message to the main fire control panel to set off the fire alarm. After installation of the new fire services system, the number of unwanted fire alarms has decreased significantly, demonstrating that we are able to provide better quality services to the client.
For more information on the fire services system using linear heat detectors, please contact Mr. Ching Kwong-fai, Senior Engineer, at 2183 6558.