GB 34655-2017Specifications for extinguishing equipment arrangement in bus (English PDF)

4.1 Basic requirements

4.1.1 The extinguishing equipment arranged on vehicles shall be a vehicle-type product which meets the requirements of the national fire product market access system.

4.1.2 The extinguishing equipment arranged on vehicles shall be capable of fighting class-A, B, C, and E fires.

4.1.3 The fire extinguishing agent for extinguishing equipment arranged on vehicles shall not corrode parts on the vehicle.

4.2.2 Installation and identification

4.2.2.1 The height of the top of the extinguisher in passenger and crew compartment from the floor below it shall not exceed

1.5 m. The extinguisher and its bracket shall not protrude into the passage, passenger door approach, and emergency door approach; and shall not affect the passage of emergency window.

4.2.2.2 The extinguisher shall be installed stably. During the vehicle operating, there shall be no dumping or falling.

4.2.2.3 The extinguisher shall be convenient to access; and shall be taken and used without the aid of any tools.

4.2.2.4 The location of extinguisher shall be clearly visible. The visibility shall not be affected by changes in the position of moving parts. Otherwise, the corresponding sign shall be provided near the extinguisher. The sign shall comply with the provisions of GB 30678 and shall be easy to see; and shall not be obscured by moving parts.

4.3.1 Type and function

4.3.1.1 General requirements 4.3.1.1.1 The super fine powder fire extinguishing device (hereinafter known as "fire extinguishing device" for short) arranged on vehicles shall be a special fire extinguishing device for the engine compartment in accordance with GA 602. The super fine powder fire extinguishing agent filled in the extinguishing device shall be ABC super fine powder fire extinguishing agent in accordance with GA 578. The start-up mode of the fire extinguishing device shall be automatic start- up and manual start-up (hereinafter known as "automatic-manual integration" for short). 4.3.1.1.2 When the whole vehicle is energized, and the fire extinguishing device is automatically started, it shall be able to, through the acoustic signal, alarm the driver. d "Near the rear" means that it is located at the last 40% portion along the length direction of passenger and crew compartment. e "Near the front" means that it is located at the first 30% portion along the length direction of passenger and crew compartment. 4.3.1.1.3 The fire extinguishing device, when started under any conditions, shall not pose a potential safety hazard to personnel. 4.3.1.1.4 The wire harness of the fire extinguishing device shall comply with the provisions of GB 7258.

4.3.1.2 Additional requirements for automatic-manual integration fire extinguishing device 4.3.1.2.1 The manual start-up function and the automatic start-up function shall be independent of each other. The order of implementation of the two functions shall be unlimited. 4.3.1.2.2 The manual start-up system shall have a closed loop. When the whole vehicle is powered on, and when the manual start-up function is in an abnormal state, a continuous acoustic or visual alarm signal shall be sent to the driver. 4.3.1.2.3 When the engine is in operation or stopped, the fire extinguishing device shall be able to realize manual start-up. 4.3.1.2.4 When the engine is in operation or stopped, the fire extinguishing device shall be able to realize automatic start-up. 4.3.1.2.5 When the whole vehicle and battery are powered off, the fire extinguishing device shall be be able to realize automatic start-up function.

4.3.2 Location of the fire extinguishing device arrangement and applied extinguishing mode and extinguishing agent amount

4.3.2.1 The vehicle shall be equipped with fire extinguishing device in the engine compartment. If the battery compartment, fuel (or gas) heater compartment, and eddy current retarder installation locations are not equipped with a temperature alarm system, fire extinguishing devices shall be provided.

Note. If the battery is located in the engine compartment, it is considered a component of engine compartment. If the battery is not located in the compartment, it is considered that there is no battery compartment.