Classification and selection of chemical protective clothing

The protective clothing consists of a coat, pants, hat, etc., designed to the appropriate size and shape, the design size and shape and the combination method to effectively block the intrusion of harmful substances shall prevail, can be a one-body structure, but also a split structure. The structure of the protective clothing should be reasonable, easy to wear and take off, and the combination of parts should be tight.

In the on-site disposal of chemical leakage and poisoning, the function of protective clothing is to provide barrier protection for on-site workers to come into contact with harmful chemicals and harmful gases, dust, smoke and fog in the air.

According to the type of poison and environmental conditions, the chemical accident site will be divided into hot zone, warm zone and cold zone, the protection required in each area is different, and the protective clothing used in one area can not be used in other areas.

The selection of protective clothing should be considered according to the type of leakage, the way of existence, environmental conditions and concentration. For the site with corrosive gaseous substances (steam, dust, smoke, etc.), protective clothing should be corrosion resistant,

High isolation efficiency, a certain degree of water resistance and clothing, cuff, trouser leg has a good close, etc.; For non-evaporative solid or liquid chemicals, only protective clothing with a certain isolation efficiency is required.

The selection of protective clothing can refer to the technical parameters and application scope in the product manual.

Class A protection

Provides the most complete protection against gases and liquids in the surrounding environment. It is a fully enclosed, chemical-resistant suit, hard hat, gloves and boots, and an isolated respiratory protection device.

Protection objects: protection against high vapor pressure, absorbable through the skin, or carcinogenic and highly toxic chemicals; High concentration liquid spatter, contact, wetting and vapor exposure may occur; Exposure to unknown chemicals (pure products or mixtures); Harmful concentration reaches IDLH concentration; There's no oxygen.

Class B protection

When the toxic gas is not seriously harmful to the skin, it is only used for respiratory protection. Unlike Class A, it includes A non-enclosed, sputtering, chemical-resistant suit that provides the same protection against liquids as Class A, but is not sealed.

Protection objects: known gaseous toxic chemicals, can be absorbed by the skin or respiratory tract harm, reach IDLH concentration, hypoxia;

Class C protection

It includes a spillproof suit with a filter protector that completely covers the face.

Protection objects: non-skin absorption of toxic substances; The type and concentration of the poison are known; The concentration is lower than IDLH concentration; No lack of oxygen.