1.1 本规程规定了职业呼吸器使用的最低可接受的规程；提供有关正确选择、使用和维护呼吸器的信息和指导；并包含建立、实施和评估呼吸器计划的要求。 1.2 本规程涵盖了使用呼吸器保护人员免受有害空气污染物和工作场所缺氧环境的影响。本规程不包括以下内容: 1.2.1 水下呼吸装置， 1.2.2 飞机氧气系统， 1.2.3 提供的空气服， 1.2.4 在军事作战条件下使用呼吸器，以及 1.2.5 医用吸入器和复苏器。 1.3 单位-- 以英寸-磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ===意义和用途====== 4.1 本规程旨在为正确选择、使用和维护呼吸器提供信息和指导，这将有助于保障呼吸器佩戴者的生命和健康。本规程适用于所有与呼吸保护有关的人员，尤其是那些主要负责制定和管理可接受呼吸器程序的人员。 本规程包含建议执法部门制定呼吸保护使用法规或规范的要求。 4.2 例外情况-- 本规程的使用者应意识到，监管机构可能有与本规程不同的要求。

1.1 This practice sets forth minimally accepted practices for occupational respirator use; provides information and guidance on the proper selection, use, and maintenance of respirators; and contains requirements for establishing, implementing, and evaluating respirator programs. 1.2 This practice covers the use of respirators to protect persons against the inhalation of harmful air contaminants and oxygen-deficient atmospheres in the workplace. The following are not covered by this practice: 1.2.1 Underwater breathing devices, 1.2.2 Aircraft oxygen systems, 1.2.3 Supplied-air suits, 1.2.4 Use of respirators under military combat conditions, and 1.2.5 Medical inhalators and resuscitators. 1.3 Units— The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 The purpose of this practice is to provide information and guidance on the proper selection, use, and maintenance of respirators, which will help safeguard the life and health of respirator wearers. This practice is written for all persons concerned with respiratory protection, but especially for those primarily responsible for establishing and administering an acceptable respirator program. This practice contains requirements recommended for enforcement authorities in establishing regulations or codes for respiratory protection use. 4.2 Exceptions— Users of this practice shall be aware that regulatory agencies may have requirements that are different from this practice.