Regarding automatic fire alarm systems
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The code \"Design Code for Automatic Fire Alarm Systems\" GB 50116-2013 sets detailed requirements for residential buildings; however, for the design of industrial buildings, it seems to be too general. We often come across chemical plants of type A and B, which usually contain metal equipment such as reaction vessels. I think there’s no need to install fire detectors there – they would be useless anyway. If the gases or liquids inside those vessels do leak out and catch fire, wouldn’t that cause an explosion? Do you really need to go and probe it? There’s a standard that states (I can’t remember the name), that important plant facilities in chemical factories should be equipped with such things; well, everything needs to be equipped with them – how can there be any part that isn’t important?
The original poster may not be very familiar with automatic fire alarm systems, which encompass various components such as smoke detectors, heat detectors, alarm buttons, fire announcement systems, as well as audio-visual alarms. Building codes specify in 8.4.3 that areas within a building where flammable gases or vapors might be present must be equipped with gas detection devices. Moreover, the petrochemical regulations also specify that petrochemical plants and their key facilities throughout the plant should be equipped with automatic fire alarm systems and fire telephone alarms; therefore, designs are carried out in accordance with these regulations.
Thanks, buddy, but you see, whether it’s area alarm, centralized alarm, or control center alarm, fire detectors, manual alarms, audible and visual alarms, and the like are all necessary to be installed. In a factory building like the one I mentioned, there’s no need to install these at all, as they’re completely ineffective; it’s sufficient to have only flammable and toxic gas detectors. Of course, these are all my immature opinions.
I also think it’s useless; nowadays, production workshops are equipped with walkie-talkies, and alarm phones are also necessary.
In some areas of chemical plant buildings, fire detectors are not required, while in other areas they are necessary. It’s hard to say; I personally don’t think it’s necessary to do it.
In facilities or plants where flammable gases or liquids are present, flammable gas detectors are usually installed. I have asked some people about this before; the role of flammable gas detectors is far greater than that of fire alarm detectors. Compared to fire alarms, flammable gas detection provides a sense of foresight, allowing accidents to be controlled before a fire breaks out. In such places, an explosion can occur very quickly once a fire starts, so fire alarm detectors become less useful in such situations.
There is a term called a minor fire. Does installing fire alarm detectors along with a linked control system mean that? Also, I think combustibility and fire are not exactly the same to some extent. One can be repaired, the other can only be destroyed.
The regulations set clear requirements: According to Code for Building Design 8.4.3, gas alarm devices shall be installed in areas within a building where flammable gases or vapors may be released. Design specifications for automatic alarm systems: 5 Selection of fire detectors 5.1 General provisions 5.1.1 The selection of fire detectors shall comply with the following requirements: 1 In areas where there is a smoldering phase at the beginning of a fire, resulting in large amounts of smoke and little heat, with little or no flame radiation, smoke detectors should be used. In 5 types of locations where flammable gases or vapors are used or produced, flammable gas detectors should be selected. The combustible gas alarm device should be interconnected with the fire alarm system. I have a case here where Class A factories are equipped only with combustible gas detectors, which are linked to the fire protection system. Sound and light systems, as well as manual alarm devices, are also installed in the factory building. Class A factories must not produce smoke or catch fire; instead, it is necessary to effectively monitor the generation of combustible gases in order to eliminate potential hazards at an early stage. Once smoke appears or a fire breaks out, the focus shifts more to evacuation and isolating the area for firefighting.