本3-A卫生标准适用于容纳或输送产品的加工设备和管道上使用的配件的卫生方面。配件从设备或管道连接处开始，在密封垫、O形圈或密封件处结束。装配式软管组件的配件标准见3-A软管组件卫生标准62-。3-A符号授权不得授予装配式软管组件上使用的配件。本标准不适用于:通过膨胀或焊接方式连接到管道或设备的嵌入式套圈。无凹槽或滚装配件。用于固定配件的夹子。为符合本3-A卫生标准，配件应符合以下设计、施工材料、制造技术和安装标准（如适用），以及本文引用的所有参考文件的当前版本或版本。

This 3-A Sanitary Standard applies to the sanitary aspects of fittings used on processing equipment and pipelines which hold or convey products. The fitting begins at the equipment or pipeline connection and ends at and may include the gasket, O-ring, or seals.Standards for fittings for fabricated hose assemblies are found in 3-A Sanitary Standard for Hose Assemblies, 62-.3-A Symbol authorization shall not be granted to a fitting used on a fabricated hose assembly.This standard does not apply to:Recessed ferrules, which are attached to a pipeline or equipment by means of expansion or soldering.Recessless or rolled-on fittings.Clamps used to secure fittings.To conform to this 3-A Sanitary Standard, fittings shall conform to the following criteria for design, materials of construction, fabrication techniques and installation, as applicable, and the current revisions or editions of all referenced documents cited herein.