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使用呼吸防护用品的目的是预防有害环境威胁健康,所以防护对象必须与危害存在的形态相匹配,防护水平必须与危害程度相当,能够将危险水平降到可以接受的安全程度,呼吸防护用品还必须方便作业,适合在实际作业条件下使用,与同时使用的工具或防护用品配合,并适合使用人的特点,所以应先根据有害环境选择(对应于标准的4.2),再根据作业状况选择(对应于标准的4.3),最后根据作业人员选择(对应于标准的4.4)。识别有害环境性质,判定危害程度,是选择呼吸防护用品的第一步。
The purpose of the use of respiratory protection is to prevent the environment from endangering the health of the environment, so the object of protection must match the form of the hazard, the level of protection must be equal to the degree of harm, the level of danger should be reduced to an acceptable level of safety, and respiratory protection products must Easy to operate, suitable for use under actual working conditions, and with the use of tools or protective equipment, and suitable for the use of people’s characteristics, so should be based on the choice of hazardous environment (corresponding to the standard 4.2), and then select according to the operating conditions In the standard 4.3), finally according to the operator selection (corresponding to the standard 4.4). Identify the nature of harmful environment, determine the degree of harm, is the first step in the selection of respiratory protection products.