本SAE标准规定了能够定义但通常在图纸规范中找不到的质量方面。试图以绝对术语定义活塞环的正常商业制造中可达到的质量的困难是众所周知的。在本文件中，量化了铸造缺陷和其他偏离理想的质量方面。许多小缺陷显然是可以接受的；由于尺寸或数量而导致的其他缺陷是不可接受的。本文件涵盖以下内容:a)灰铸铁、碳化物、可锻铸铁、球墨铸铁或钢的单件活塞环；b)由铸铁件和弹簧部件组成的多件式pistong环(控油环)；c)单件式和多件式钢圈，即。、带弹簧膨胀器部件的带钢部件或钢段（轨）形式的控油环。除了规定与检查测量原理（SAE J1589涵盖）相关的某些验收限度外，本文件还涵盖了那些不存在公认的定量测量程序且仅在正常视力且不放大的情况下目视检查的特征。这些特征（表面缺陷）是对环宽度、径向壁厚和闭合间隙的标准公差的补充。本文件的要求适用于往复式内燃机和压缩机的上述分类所涵盖的直径不超过200 mm（含200 mm）的所有环。

This SAE Standard specifies the quality aspects that are capable of definition but not normally found on a drawing specification. The difficulty of trying to define in absolute terms the quality attainable in normal commercial manufacture of piston rings is well known. In this document the commonly encountered aspects of quality in terms of casting defects and other departures from ideal are quantified. Many minor defects are clearly quite acceptable; other defects because of size or numbers are inadmissible. This document covers the following: a) Single piece piston rings of grey, carbidic, malleable, spheroidal graphite cast iron or steel; b) Multipiece pistong rings (oil control rings) consisting of cast iron parts and spring components; c) Single piece and multipiece rings of steel, i.e., oil control rings in the form of strip steel components or steel segments (rails) with spring expander components. In addition to specifying certain limits fo acceptance relating to inspection measuring principles (covered by SAE J1589) this document also covers those features for which no recognized quantitative measurement procedures exist and which are only checked visually with normal eyesight and without magnification. Such features (superficial defects) are additional to the standard tolerances of ring width, radial wall thickness, and closed gap. The requirements of this document apply to all rings up to and including 200 mm diameter covered by the above classification for both reciprocating internal combustion engines and compressors.