标准编号：ISO 6621-4:2015
中文名称：内燃机 活塞环 第4部分：通用规范
英文名称：Internal combustion engines — Piston rings — Part 4: General specifications
发布日期：2015-03
标准范围
This part of ISO 6621 specifies the general characteristics of piston rings for reciprocating internalcombustion engines for road vehicles and other applications (the individual dimensional criteria forthese rings are given in the relevant International Standards). It also provides a system for ring coding,designation, and marking. It is applicable to all such rings of a nominal diameter from 30 mm up to andincluding 200 mm.
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