本SAE标准规定了R、b和M矩形活塞环类型的基本尺寸特征。 尺寸表8和9提供了两种径向壁厚的选择:a.径向壁厚“常规”(表8)；b.径向壁厚“D/22”（表9）。 本文件的要求适用于往复式内燃机活塞直径不超过200 mm（含200 mm）的矩形环。它们也可用于在类似条件下工作的压缩机的活塞环。

This SAE Standard specifies the essential dimensional features of R, b, and M rectangular piston ring types. Dimensional tables 8 and 9 offer the choice of two radial wall thicknesses: a. radial wall thickness "regular" (table 8); b. radial wall thickness "D/22" (table 9). The requirements of this document apply to rectangular rings for reciprocating internal combustion piston engines up to and including 200 mm diameter. They may also be used for piston rings of compressors working under similar conditions.