Installation height of flammable and toxic detectors
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The ammonia leak point is 1 meter above the ground level; is it appropriate to set the gas alarm at a height of 2 meters? If the leak point is 2 meters above the ground, would setting the installation height at 4 meters be too high?
Ammonia is lighter than air and rises. If the ammonia leak is 1 meter above the ground, it is appropriate to install the gas alarm at a height of 2 meters. If the leak point is 2 meters above the ground, installing the alarm at a height of 4 meters may result in delayed detection; it is recommended to install it at a height of around 3 meters. .
GB/T 50493-2019, Clause 6.1.2: “When detecting flammable gases or toxic gases that are heavier than air, the installation height of the detector should be between 0.3 m and 0.6 m above the floor (or floor slab).”； When detecting flammable gases or toxic gases that are lighter than air, the installation height of the detector should be within 2 meters above the source of emission. When detecting flammable gases or toxic gases that are slightly heavier than air, the installation height of the detector should be between 0.5 m and 1 m below the source of emission ； When detecting flammable gases or toxic gases that are slightly lighter than air, the installation height of the detector should be 0.5 m to 1 m above the source of emission. Explanation of the provisions: \"When detecting flammable gases that are lighter than air (such as methane and gas), placing the detector 1–2 meters above the source of emission and reducing the horizontal distance from it to within 5 meters allows for the rapid detection of such flammable gases.\" When detecting hydrogen leaks in a specified area, the detector should be installed within 1 meter around the source of release and above it; if it is placed too far away, the rapid diffusion and rise of hydrogen will render the detection ineffective. ”
There are standards for these; when detecting flammable gases or toxic gases that are slightly heavier than air, the installation height of the detector should be between 0.5 m and 1 m below the source of emission； When detecting flammable gases or toxic gases that are slightly lighter than air, the installation height of the detector should be 0.5 m to 1 m above the source of emission. Just check the specifications.