请注意:此版本的所有临时修订版将在您购买时提供。1.1这些要求适用于实验室通风罩和机柜，这些通风罩和机柜旨在提供一个封闭的台面工作区，带有排气装置，用于控制和清除工作区的蒸汽、雾气、气体和颗粒物。1.2这些要求不包括无管道通风罩（即过滤后将空气再循环回室内环境的通风罩）或手套箱。1.3这些产品仅针对火灾、电气和机械伤害风险进行调查。为获得最小气流能力，进行了数量有限的测试。根据本标准中的要求确认的发动机罩性能是否满足用户的需求，仍由用户确定。这些需求取决于几个因素，包括安装适当的排气设备、房间内的位置、处理的材料类型和处理材料的方法。 此外，不调查是否适合与高氯酸或放射性材料一起使用。1.4实验室通风柜的安装要求包含在NFPA 45《使用化学品的实验室防火标准》和ASHRAE 110.1.5《实验室通风柜性能测试方法》中，管道气体系统的安装要求包含在以下标准中:1。国家燃气法规，NFPA 54,2。液化石油气规范，NFPA 58,3。消费场所的气态氢系统，NFPA 50A，4。焊接、切割和相关工艺用氧气燃气系统的设计和安装，NFPA 51。

Please note: All interim revisions for this edition available at time of your purchase will be included.1.1 These requirements apply to laboratory hoods and cabinets intended to provide an enclosed countertop work area with exhaust for containment and removal of vapors, mists, gases, and particulate matter from the work area.1.2 These requirements do not cover ductless hoods (i.e., hoods that recirculate air back to room environment after filtering) or gloveboxes.1.3 These products are investigated for fire, electrical and mechanical risk of injuries only. A limited number of tests are conducted for minimal air flow capability. It remains for the user to determine that the hood performance, as confirmed by the requirements in this standard, meets the needs of the user. These needs depend on several factors, including installation with proper exhaust equipment, location within the room, the type of material being handled and the method in which the material is being handled. Also, suitability for use with perchloric acid or radiological materials is not investigated.1.4 Requirements for the installation of laboratory hoods are included in the Standard for Fire Protection for Laboratories Using Chemicals, NFPA 45 and in the Method of Testing Performance of Laboratory Fume Hoods, ASHRAE 110.1.5 Requirements for the installation of piped gas systems are contained in the following standards:1. National Fuel Gas Code, NFPA 54,2. Liquefied Petroleum Gas Code, NFPA 58,3. Gaseous Hydrogen Systems at Consumer Sites, NFPA 50A,4. Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes, NFPA 51.