• ISO 6621-5:2020

    Current The latest, up-to-date edition.

    Internal combustion engines Piston rings Part 5: Quality requirements

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  27-01-2020

    Publisher:  International Organization for Standardization

    Add To Cart

    Abstract - (Show below) - (Hide below)

    This document specifies quality aspects that can be defined but that are not normally found on a drawing specification.

    It covers the following:

    singlepiece piston rings of grey cast iron or steel;

    multipiece piston rings (oil control rings) consisting of cast iron parts and spring components; and

    singlepiece and multipiece oil control 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 some of the limits of acceptance relating to inspection measuring principles (covered by ISO 66212), this document also covers those features for which no recognized quantitative measurement procedures exist and which are only checked visually with normal eyesight (glasses if worn normally) and without magnification. Such features (superficial defects) are additional to the standard tolerances of ring width, radial wall thickness and closed gap.

    This document does not establish acceptable quality levels (AQL), it being left to manufacturer and customer to decide the appropriate levels jointly. In this case, the recommendations of ISO 28591 are followed.

    This document specifies the quality requirements of piston rings for reciprocating internal combustion engines for road vehicles and other applications. It is applicable to all such rings of a nominal diameter from 30 mm up to and including 200 mm.

    General Product Information - (Show below) - (Hide below)

    Committee ISO/TC 22/SC 34
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective