Gas density and combustible gas detectors
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The company wants to install combustible gas detectors and is unsure whether to place them on the upper or lower part Which gas is lighter than air? Are there any standards for acetylene, liquefied gas, and so on?
Refer to GB50493—2009 \"Code for Design of Detection and Alarm Systems for Flammable and Toxic Gases in Petrochemical Industries\"
The answer is upstairs, applause....
Those with a specific gravity greater than 0.75 are heavier than air, while those with a specific gravity less than or equal to 0.75 are lighter than air. For details, see the explanatory notes in GB50493—2009 \"Code for Design of Detection and Alarm Systems for Flammable and Toxic Gases in Petrochemical Industries\".
Under normal conditions, that is at 20 degrees Celsius, the density of air is 1.205 kg/m3.
Under normal conditions, that is at 20 degrees Celsius, the density of air is 1.205 kg/m3. The density of acetylene is 1.61 g/L, while the density of liquefied petroleum gas is generally around 2. 3-2. Around 4, while liquefied natural gas is generally at 0. 42-0. Between 47.
Under normal conditions, that is at 20 degrees Celsius, the density of air is 1.205 kg/m3. The density of acetylene is 1.61 g/L, while the density of liquefied petroleum gas is generally around 2. 3-2. Around 4, while liquefied natural gas is generally at 0. 42-0. Between 47. 6.1.1 For detectors that detect flammable gases with a density greater than that of air, their installation height should be between 0.3m and 0.6m above the floor (or floor slab). For detectors that detect toxic gases with a density greater than that of air, they should be installed near the source of leakage, at a height of 0.3m to 0.6m above the floor (or floor slab). 6.1.2 For detectors that detect flammable gases or toxic gases with a density less than that of air, their installation height should be above the source from which these gases are released. 5m~2m.
There is also a standard, SY6503-2000, which outlines the requirements for the use of combustible gas alarms; it includes an additional provision stating that the installation height should be between 0.5 and 1 meter above the roof surface