Yunku Industrial Safety

A variety of harmful gases may be produced in a confined space, depending on the environmental conditions and material composition of the space. Here are some of the factors that can produce harmful gases:

1. No air circulation: no air circulation in a confined space, which is easy to cause insufficient oxygen and produce harmful gases such as carbon monoxide and carbon dioxide.

2. Chemical substances: there may be chemical substances in the confined space, such as acids, alkalis, ammonia, etc., which may cause harm to the human body.

3. Biological harmful gases: bacteria, viruses and other microorganisms may exist in the confined space, which will produce harmful gases, such as hydrogen sulfide and methane.

4. Ventilation equipment failure: Ventilation equipment failure may lead to airless, resulting in harmful gases.

So what is the confined space gas detection standard? What is the acceptable concentration range? Yunku Technology has sorted out the testing standards and qualification range of some toxic gases and combustible gases for reference only;

The oxygen content of the air in the workplace with confined space should be 19.5% ~ 21%, and if the oxygen content of the air is lower than 19.5%, ventilation measures should be taken.

The concentration of combustible gas in the air in confined space: hydrogen is less than 0.4%, diesel is less than 0.2%.

Dust concentration in confined space is less than 20g/ m3.

The maximum concentration of hydrogen sulfide in confined space is 10mg/ m3.

The maximum permissible concentration of acetaldehyde is 45mg/ m3.

The time-weighted average allowable concentration of carbon monoxide is 20mg/ m3. The permissible concentration for short exposure is 30mg/ m3.

The time-weighted average allowable concentration of carbon dioxide is 9000mg/ m3; The permissible concentration for short exposure is 18000mg/ m3.

The time-weighted average allowable concentration of ammonia is 20mg/ m3, and the allowable concentration for short exposure is 30mg/ m3.

The maximum permissible concentration of chlorine is 1mg/ m3. 9. The maximum allowable concentration of hydrogen cyanide (CN) is 1mg/ m3.

The time-weighted average allowable concentration of nitric oxide is 15mg/ m3.

Maximum permissible concentration of cyanide (CN) 1mg/ m3.

The time-weighted average allowable concentration of bromine is 0.6mg/ m3, and the allowable concentration for short exposure is 2mg/ m3.

The maximum permissible concentration of hydrogen bromide is 10mg/ m3.

The maximum allowable concentration of formaldehyde is 0.5mg/ m3.

The time-weighted average allowable concentration of LPG is 1000mg/ m3, and the allowable concentration of short-term contact is 1500mg/ m3.

The time-weighted average allowable concentration of ether is 300mg/ m3, and the allowable concentration for short exposure is 500mg/ m3.

The time-weighted average allowable concentration of toluene is 50mg/ m3, and the allowable concentration for short exposure is 100mg/ m3.

The time-weighted average allowable concentration of benzene is 6mg/ m3, and the allowable concentration for short exposure is 10mg/ m3.

The time-weighted average allowable concentration of nitrogen dioxide is 5mg/ m3, and the allowable concentration for short exposure is 10mg/ m3.

The time-weighted average allowable concentration of sulfur dioxide is 5mg/ m3, and the allowable concentration for short-term contact is 10mg/ m3.

The time-weighted average allowable concentration of methanol is 25mg/ m3, and the allowable concentration for short exposure is 50mg/ m3.

The gas detector of Yunku technology can customize the gas type according to the actual needs, when beyond the threshold can be real-time alarm to remind the regulators and the personnel inside the confined space to avoid the accidents.