Chemical protective clothing is divided into different levels according to its protective performance. Take the US Environmental Protection Agency’s classification of protective clothing protection levels as an example, which uses the concept of “A, B, C and D level protection. Class A protective clothing provides the highest level of respiratory, skin and eye protection available. Class B protective clothing provides the same respiratory protection as Class A, but the level of skin protection is slightly lower. Class C protective clothing provides skin liquid splash protection and low-level respiratory protection. Class D protective clothing provides slight skin protection and no respiratory protection.
This concept of hierarchical protection has been misused to a certain extent. Especially A-level protection is considered to be the highest level of protection. Although Class A protective clothing is considered the best protective clothing in terms of definition and classification, it is not suitable for all occasions. In some special occasions, wearing Class A protective clothing not only cannot provide reliable protection, but may even cause danger to personnel. In most hazardous waste treatment situations, when the concentration of harmful vapors in the environment does not reach the level that requires A-level protection, B-level protection is sufficient.
In addition, in some occasions, the choice of the size of chemical protective clothing and the choice of protection level are equally important, it is not only related to comfort, but also to safety.
Therefore, it is far from enough to choose the appropriate protective clothing by only relying on the level of protection. Choosing chemical protective clothing requires in-depth and extensive understanding of the performance and use of chemical protective clothing. The concept of “clothing” is not accurate enough here. We are not choosing a “clothing”, but choosing a life support system. The life of the wearer must rely on this system to maintain. When choosing protective clothing, consideration should be given to factors such as protective fabrics, visibility, stitch structure, types of protective clothing, and mask selection.