本文件旨在提供清洁飞机呼吸氧气系统和部件的最低要求、清洁后的检查方法和包装，以及氧气设备清洁区域的指南。适用性:当采购文件中规定了本标准时，应确定适用于采购文件的本标准适用要求。应用指南:由于氧气设备结构、材料等的复杂性，本标准的某些规定以及制造商的清洁检查和包装程序可能会有所不同。应在采购文件中确定这些差异，并确定哪些是可接受的；本标准的规定、制造商的程序或规定的可接受替代方案（如适用）。分类:就本标准而言，呼吸氧气设备应分类如下:1级: 暴露在超过450 psi（3.1 MPa）的氧气压力或液态氧下的零件和组件；2级:暴露在10至450 psi（6.89 kPa至3.1 MPa）氧气压力下的零件和组件；3级:暴露在高达10 psi（6.9 kPa）氧气压力下的零件和组件（如面罩、大口径调节器至接头软管、氧气面罩软管接头等）。

The purpose of this document is to provide minimum requirements for cleaning aircraft breathing oxygen systems and components, inspection methods and packaging after cleaning, and guidelines for oxygen equipment cleaning areas.Applicability: When this standard is specified in an acquisition document, the applicable requirements of this standard that apply to the acquisition document shall be identified.Application guidance: Certain provisions of this standard and the manufacturer's cleaning inspection and packaging procedures may differ due to oxygen equipment complexity of construction, material, etc. These differences shall be identified in the acquisition document with a determination of what is acceptable; the provisions of this standard, the manufacturer's procedure, or a specified acceptable alternate, as applicable.Classification: For the purpose of this standard, breathing oxygen equipment shall be classified as follows: Class 1: Parts and assemblies exposed to oxygen pressures over 450 psi (3.1 MPa) or liquid oxygen; Class 2: Parts and assemblies exposed to oxygen pressures from 10 to 450 psi (6.89 kPa to 3.1 MPa), inclusive; Class 3: Parts and assemblies exposed to oxygen pressures up to 10 psi (6.9 kPa) (such as face masks, large bore regulator-to- connector hoses, oxygen mask hose connectors, etc.).