(1) Consider other characteristics of harmful environment
  1. Air pollutants can also stimulate the eyes or skin (such as ammonia, mineral wool dust), or can be absorbed through the skin (such as benzene, methyl bromide and many pesticides), or corrosive to the skin (such as hydrogen fluoride); Cover while protecting other exposed skin.
  2. There are other hazards at the same time. For example, strong light, sparks and high-temperature radiation are generated during electric welding or gas cutting. The countermeasure is to choose a full-face cover that can match the welding goggles and the heat-proof radiation shawl, or choose a flame-resistant function. Dust mask; for the splashes that exist during grinding, choose a full face mask with an impact-proof window.
  3. When using air-borne respiratory protection products in an explosive environment, you should pay attention to only choose air breathing apparatus, not oxygen breathing apparatus; if you choose electric air supply filter type, you should select intrinsically safe motor.
  4. The working environment has high temperature, high humidity, or organic solvents and other corrosive substances. Attention should be paid to the selection of anti-aging and anti-corrosion materials for respiratory protection products. For example, silicone materials are more resistant to aging than ordinary rubber materials, or they are selected to have a cooling effect. Dehumidification-provided air-breathing protection reduces heat stress on workers.
  (B), considering the characteristics of the operation
  1. Consider the equipment layout of the work site, the flow of personnel or motor vehicles, etc. When selecting the air supply type, pay attention to the distance between the air source and the working point. The possible arrangement of the air pipe may hinder the operation of other operators. Whether the air supply pipe may be accidentally cut off or the like.
  2. If the work intensity is high and the operation time is long, you should choose respiratory protection products with low respiratory load, such as dust masks with low respiratory resistance, or choose power supply air filter type and air supply type.
  3. When the job has clear visual needs, choose a wide field of view mask; if you need language communication, you should have a suitable call function.
  5. If you need to use other tools and protective equipment in your work, you should pay attention to each other.
  Second, according to the characteristics of the workers choose respiratory protection products
  1. Consider the user's head and face features
  The close-fitting mask (ie half mask and full face mask) relies on the close contact with the user's face to ensure proper functioning of the protective function. People's face types are varied, and each type of close-fitting mask is not suitable for everyone, and there may be leaks when worn. How to avoid this situation? Closed masks usually have different numbers, which can be selected according to the size of the face, but it is still not possible to reliably determine the suitability according to the type selection. In the Appendix E of the Standards for the Selection, Use and Maintenance of Respiratory Protective Devices, a relatively simple method, called suitability testing, is introduced.
  Suitability testing is a method of testing the suitability of a type of close-face mask for a particular user. This method was introduced from abroad and was not used in China before. The advantage is that both the user of the protective device and the safety and hygiene supervisor can use an objective method to select a properly designed product to eliminate the possibility of dangerous leakage, which is especially important for the selection of negative pressure respiratory protection products.
  There are two types of suitability tests: qualitative and quantitative. The specific methods are described in detail in Appendix E. Because the qualitative method is simple, it is suitable for on-site inspection of each person using a close-up mask. This service can be provided by the manufacturer or seller of respiratory protection products, or it can be self-inspected by the employer in accordance with the method of Appendix E. Quantitative suitability testing is more suitable for full face masks in IDLH environments or for scientific research.
  Due to the new suitability test method, there are still few applications in China, and the ready-made inspection products are also less in the market. From the feasibility, the standard uses it as a recommended method for users' reference.
  Another factor to be aware of is that men with a beard with some styles can't use a close-up mask. If you can't persuade them to shave their beards, they can only choose masks that don't need to be tight, such as open masks.
  2. Consider people who wear glasses
  There are many people who wear glasses in general, so the use of a full face mask can not affect the wearing of glasses, and wearing glasses can not affect the closeness of the mask, such as the gasket that can not be inserted into the lens legs, which will definitely lead to leakage. The best way to solve this problem is to choose a full face mask with a built-in eyeglass frame, or choose a blower cover or an open face mask that does not require a close fit.
  3. Some people may not be suitable for respiratory protection products. For people with certain diseases in the cardiopulmonary system, the extra respiratory load will aggravate their condition; others may feel instinct, anxiety, or have instinctively in small spaces. Being isolated, this kind of psychological reaction can affect the accuracy and efficiency of the work, and even the impact is dangerous. The standard Appendix F, “Medical Evaluation of the Ability to Use Respiratory Protective Devicesâ€, describes the physiological and psychological aspects that should be considered to help identify people who are not suitable for use.
  Yongxing Labor Insurance supplies respiratory protection products that meet national safety standards . The quality is excellent, comfortable, light and efficient.
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