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。众所周知，在活塞环的正常商业制造中，很难用绝对术语定义可达到的质量。在本文件中，就铸件缺陷和其他偏离理想情况而言，质量的常见方面进行了量化。许多小缺陷显然是可以接受的；其他因尺寸或数量造成的缺陷是不允许的。

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.