How much do you know about the safe use and maintenance of respiratory protective equipment?


Release time:

2023-04-04

In the production process of metallurgy and non-ferrous industries, harmful gases, steam, dust, smoke and fog may pass through the respiratory tract, threatening people's health... and respiratory protective equipment is to ensure Protective equipment for normal breathing.

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In the production process of metallurgy and non-ferrous industries, harmful gases, steam, dust, smoke and mist may pass through the respiratory tract, threatening people's health... and respiratory protection equipment is guaranteed to prevent dust, poisonous pollution or Protective equipment for normal breathing of workers in anoxic environment.

Classification of respiratory protective equipment

According to GB39800.1-2020 "Specifications for Personal Protective Equipment Part 1: General Principles", respiratory protective equipment includes 8 categories.

Description of protective equipment

Protective equipment that isolates the wearer's respiratory organs from the surrounding air and delivers clean air for breathing through a long tube. The air inlet must be placed outside the harmful working environment.

Refer to the scope of application

Shipbuilding, coal mines, metallurgy, non-ferrous metals, petroleum, natural gas fireworks and firecrackers chemical industry, building materials, cement, non-coal mines, light industry, electric power, machinery and other workplaces where there are various particulate matter and toxic and harmful gas environments. Not suitable for fire and rescue use. See GB/T18664 for the applicable concentration range.

Description of protective equipment

A filter respirator that relies on an electric fan to provide airflow to overcome the resistance of the components, and is used to prevent damage to the respiratory system from toxic and harmful gases or vapors, particles, etc.

Refer to the scope of application

Shipbuilding, coal mines, metallurgy, non-ferrous metals, petroleum, natural gas, chemicals, building materials, cement, non-coal mines, electric power, machinery and other workplaces where toxic gases, vapors and (or) particles exist. Not suitable for combustion, explosion and oxygen-deficient environment and escape. See GB/T18664 for the applicable concentration range.


Description of protective equipment

Using the mask to isolate the respiratory organs of the wearer from the harmful outside air, relying on the compressed oxygen or compressed oxygen and nitrogen mixture carried by the respirator itself as the breathing gas source, absorbing the carbon dioxide in the exhaled gas of the human body, and then supplementing the oxygen For personnel to breathe and form a complete breathing cycle.

Refer to the scope of application

Shipbuilding, coal mining, metallurgy, nonferrous metals, petroleum, natural gas, fireworks, chemical industry, building materials, cement, non-coal mines, light industry, electric power, machinery and other workplaces where there are various particulate matter and toxic and harmful gas environments. Not suitable for diving and escape, see GB/T18664 for applicable concentration range.

Description of protective equipment

Isolate the human respiratory organs from the atmospheric environment, use chemical oxygen generation agent or compressed oxygen as the gas supply source, and absorb the exhaled carbon dioxide to form a complete breathing cycle for the wearer in an oxygen-deficient or toxic and harmful gas environment Escape use.

Refer to the scope of application

Escape from accidents in shipbuilding, metallurgy, nonferrous metals, petroleum, natural gas, fireworks, firecrackers, chemicals, building materials, cement, non-coal mines, light industry, electric power, machinery and other workplaces. Not suitable for escape from diving operations. See GB/T18664 for the applicable concentration range.

Description of protective equipment

Use the mask to fit the face of the wearer closely, so that the respiratory organs, eyes and face of the wearer are completely isolated from the outside poisonous air or hypoxic environment, and the compressed air source is provided to supply the clean air used by the wearer to breathe, and the exhaled gas is directly into the atmosphere.

Refer to the scope of application

Shipbuilding, coal mines, metallurgy and non-ferrous metals, oil, natural gas, fireworks, firecrackers, chemicals, building materials, cement, non-coal mines, light industry, electric power, machinery and other workplaces where there are various particulate matter and toxic and harmful gas environments. Not suitable for diving and escape use. See GB/T18664 for the applicable concentration range.

Description of protective equipment

Relying on the wearer's breathing to overcome the resistance of the components to prevent damage to the respiratory system or the eyes and face from toxic, harmful gases or vapors, particles, etc.

Refer to the scope of application

Shipbuilding, coal mining, metallurgy, non-ferrous metals, petroleum, natural gas, fireworks, firecrackers, chemical industry, light industry, electric power and other workplaces where toxic gases, vapors and (or) particles exist. It is not suitable for anoxic environment, underwater operation, escape and fire-fighting hot zone. See GB/T18664 for the applicable concentration range.

Description of protective equipment

It has its own compressed air source, which can supply clean air for people to breathe, and the exhaled gas is directly discharged into the atmosphere, which is a kind of respirator used for escape.

Refer to the scope of application

Used for escape from accidents in shipbuilding, metallurgy, nonferrous metals, petroleum, natural gas, fireworks, firecrackers, chemicals, building materials, cement, non-coal mines, light industry, electric power, machinery and other workplaces. For the applicable concentration range, see GB/T18664.

Description of protective equipment

Also known as a dust mask, it is a filter respirator that relies on the wearer to breathe to overcome the airflow resistance of the components, and is used to protect against particulate matter.

Refer to the scope of application

Shipbuilding, coal mining, metallurgy, non-ferrous metals, petroleum, natural gas, fireworks, firecrackers, chemicals, building materials, cement, non-coal mines and other workplaces with various particle pollutants. It is not suitable for protection against harmful gases and vapors, nor for anoxic environment, underwater operations, escape and fire protection. For the applicable concentration range, please refer to GB/T18664.

Choice of respiratory protective equipment

Correct selection and use of suitable and qualified respiratory protective equipment is directly related to the quality of work and even life of workers.

Therefore, when choosing respiratory protective equipment, the following factors need to be considered: protection, fit, comfort and quality stability.

Effective protection function is the basic and important basis for selection. To choose respiratory protective equipment with effective protective function, it is recommended to follow the following process:

In the first step, the identification of harmful environment should be carried out.

The second step is to judge the degree of harm.

The third step is to select the type of respiratory protective equipment according to the degree of hazard.

The canister (filter box) is the anti-virus filter element and the main part of the filter gas mask. Various types of canisters (canisters) are filled with special activated carbon in the middle, and the upper and lower ends are desiccant, gauze, partitions, and springs respectively.

The filtering function of the canister (filter box) is mainly that various toxic gases enter the tank and are adsorbed by activated carbon, and then removed by chemical action, adsorption and mechanical filtration, so that the toxic gas is purified into clean gas inhaled into the human body.

Canisters (canisters) are suitable for certain toxic and harmful gases or vapors, but not all gases or vapors are suitable and effective. You still need to pay attention to some special cases when choosing, and you can't use them rashly. According to the classification and level of anti-virus filter elements (GB2890-2009), the canister (filter box) is divided into:
1. Ordinary canister (filter box), coded "P" and divided into: 
1) Type A: protection against organic gases and vapors    
2) Type B: protection against inorganic gases and vapors (HCN, Cl2, CNCl) 
3) Type E: SO2 and other acid gases or vapors    
4) Type K: organic derivatives of NH3 and ammonia 
5) CO type: CO gas
6) Hg type: mercury vapor
7) H2S type: H2S gas 
2. Multifunctional canister (filter box), code "D" to protect against two or more toxic gases
3. Integrated canister (filter box), code "Z"; it is dust-proof and anti-virus at the same time
4. Special canister (canister)
It can be seen that the filter gas mask can only be used for special protection, and cannot be used casually, and cannot be mixed or misused.
Requirements for the use of respiratory protective equipment

(1) Before use, check the condition of each component of the respiratory protective equipment and replace damaged parts.

(2) For filter-type protective equipment, the filter box should be checked regularly and replaced if necessary.

(3) Users are not allowed to refill the filter respirator filter canister or the adsorption filter material in the filter box by themselves, nor are they allowed to take any method to prolong the service life of the filter element that has failed.  

(4) When in use, the airtightness of the respiratory protective equipment should be checked. If an air leak is found, it should be readjusted until there is no more air leak.

Cleaning and disinfection of respiratory protective equipment

(1) Personal respirators should be cleaned and disinfected regularly, and non-personal respirators should be cleaned and disinfected after each use.  

(2) It is not allowed to clean the filter element. For respirators with replaceable filter elements, the filter elements should be removed before cleaning.

(3) When cleaning the mask, disassemble the relevant parts according to the instruction manual, use a soft brush to wash in warm water, or add an appropriate amount of neutral detergent in warm water to wash, rinse with clean water, and then dry it in a clean place away from the sun .

(4) If it is necessary to use broad-spectrum disinfectant for disinfection, when selecting disinfectant, especially when it is necessary to prevent the spread of special germs, you should first consult the manufacturer of respiratory protective equipment and industrial hygiene experts. Special attention should be paid to the instructions of the disinfectant manufacturer, such as dilution ratio, temperature and disinfection time, etc.

Storage and maintenance of respiratory protective equipment

(1) Respiratory protective equipment should be kept in a clean, dry place free from oil, direct sunlight and corrosive gases.  

(2) If the respirator is not used frequently, it is recommended to store the respirator in a sealed bag. Avoid deformation of the mask during storage.

(3) Gas filter elements should not be stored open.

(4) Respiratory protective equipment used for emergency rescue should be kept in a ready-to-use state, and placed in a place suitable for storage, easy to manage, and easy to access, and the storage location should not be changed at will.

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