How to correctly select and install gas detection equipment?

In industrial sites such as petroleum, chemical, metallurgy, integrated pipe corridors, and commercial sites such as restaurants, hotels, and supermarkets, it is necessary to install flammable or toxic and harmful gas detectors. However, after purchasing the instrument, many consumers often fail to monitor due to incorrect installation positions, and may even damage the instrument and cause unnecessary losses. So, for different places, how should consumers effectively arrange and install flammable or toxic and harmful gas detectors?

The detection points of flammable gas and toxic gas detectors should be comprehensively analyzed based on the physical and chemical properties of the gas, the characteristics of the release source, the layout of the production site, geographical conditions, environmental climate, the characteristics of the detector, the reliability requirements of the detection alarm, and the operation inspection route. Choose the place where flammable gas and toxic gas are easy to accumulate, convenient for sampling and detection, and instrument maintenance.

Setting of flammable/toxic gas detectors in production facilities

1. The release source is in the equipment area of ​​the open air or open plant layout. The horizontal distance between the flammable gas detector and any release source within its coverage range should not be greater than 10m. The horizontal distance between the toxic gas detector and any release source within its coverage should not be greater than 4m.

2. If the release source is in a closed plant or a semi-open plant with poor ventilation, the horizontal distance between the combustible gas detector and any release source within its coverage should not be greater than 5m; the horizontal distance between the toxic gas detector and any release source within its coverage should not be greater than 2m.

3. If the release source of flammable gas or toxic gas lighter than air is in a closed or semi-open plant with poor ventilation, in addition to setting up detectors above the release source, combustible gas or toxic gas detectors should also be set up at the highest point in the plant where gas is easy to accumulate.

Installation of flammable/toxic gas detectors in firebreaks

Detectors should be installed in the firebreaks of liquid storage tanks that produce flammable gases such as liquefied hydrocarbons, Class A B, and Class B A liquids. And comply with the following regulations:

1. The horizontal distance between the combustible gas detector and any release source within its coverage should not be greater than 10m.

2. The horizontal distance between the toxic gas detector and any release source within its coverage should not be greater than 4m.

Installation of flammable/toxic gas detectors in loading and unloading facilities

For loading and unloading facilities of liquefied hydrocarbons, Class AB and Class B liquids, the installation of detectors should comply with the following regulations:

1. For railway loading and unloading platforms, a detector should be installed for each parking space on the ground, and the horizontal distance between the detector and the loading and unloading port should not be greater than 10m;

2. The horizontal distance between the loading and unloading position of a car loading and unloading station and the detector should not be greater than 10m.

The installation of detectors (detectors) for pumps or compressors in loading and unloading facilities should comply with relevant regulations.

Installation of flammable/toxic gas detectors at filling stations

The installation of detectors at liquefied hydrocarbon filling stations shall comply with the following provisions:

1. For closed or semi-open filling rooms, the horizontal distance between the filling port and the detector should be 5m to 7.5m;

2. For closed or semi-open bottle storage warehouses, relevant regulations shall be met; a detector should be installed every 15m to 20m along the four sides of the open bottle storage warehouse, and a detector should be installed when the total length of the four sides is less than 15m;

3. The horizontal distance between the buffer tank drain or valve group and the detector should be 5m to 7.5m.

Installation of flammable/toxic gas detectors in hydrogen filling rooms: For closed or semi-open hydrogen filling rooms, detectors should be installed at the highest point in the room above the filling port where gas is easily trapped.

Installation of flammable/toxic gas detectors at loading and unloading terminals: For loading and unloading terminals that may emit flammable gas, a detector should be installed within 10m of the horizontal plane of the oil transfer arm.

Installation of flammable/toxic gas detectors in storage and transportation facilities: For other storage and transportation facilities that store and transport flammable and toxic gases, flammable gas detectors and (or) toxic gas detectors should comply with relevant regulations.

Installation of flammable/toxic gas detectors in open flame heating furnaces: A flammable gas detector should be installed between the open flame heating furnace and the source of flammable gas release.

The horizontal distance between the detector and the furnace edge of the heating furnace should be 5m~10m. When there is a solid wall of non-combustible materials between the open flame heating furnace and the source of flammable gas release, a detector should be installed on the side of the solid wall close to the release source.

Correctly and reasonably layout and install flammable/toxic gas detectors, so that gas detectors can play the best performance and protect the safety of gas environment in various fields!