ISO 6621-5:2013
Internal combustion engines — Piston rings — Part 5: Quality requirements
ISO 6621-5:2013 specifies those quality aspects that are capable of definition but not normally found on a drawing specification.
It is applicable to the following: single-piece piston rings of grey cast iron or steel; multi-piece piston rings (oil control rings) consisting of cast iron parts and spring components; single-piece and multi-piece 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 certain of the limits of acceptance relating to inspection measuring principles (covered by ISO 6621-2), ISO 6621-5:2013 also covers those features for which no recognized quantitative measurement procedures exist and which are only checked visually with normal eyesight (spectacles 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.
ISO 6621-5:2013 does not establish acceptable quality levels (AQL), it being left to manufacturer and client to decide the appropriate levels jointly. In this case, the recommendations of ISO 2859 are followed.
ISO 6621-5:2013 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.
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Section sec_1
Section sec_2
Section sec_3
Section sec_4
Section sec_4.1
Section sec_4.2
Table tab_1
Section sec_4.3
Section sec_4.3.1
Section sec_4.3.2
Section sec_4.3.3
Table tab_2
Section sec_4.4
Section sec_4.4.1
Section sec_4.4.1.1
Table tab_3
Section sec_4.4.1.2
Table tab_4
Section sec_4.4.2
Section sec_4.4.2.1
Section sec_4.4.2.2
Section sec_4.4.2.3
Table tab_5
Table tab_6
Table tab_a
Figure fig_1
Table tab_b
Figure fig_2
Table tab_c
Figure fig_3
Table tab_d
Figure fig_4
Table tab_e
Figure fig_5
Table tab_f
Figure fig_6
Table tab_7
Section sec_4.4.2.4
Table tab_8
Section sec_4.4.3
Section sec_4.4.4
Table tab_9
Section sec_4.5
Section sec_4.5.1
Section sec_4.5.2
Section sec_4.5.3
Section sec_4.5.4
Section sec_4.5.5
Section sec_4.5.6
Section sec_5
Section sec_5.1
Section sec_5.2
Table tab_10
Section sec_6
Table tab_11
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.2.1
Section sec_7.2.2
Section sec_7.2.3
Section sec_7.2.4
Section sec_7.2.5
Section sec_7.2.6
Table tab_12
Section sec_7.3
Table tab_13
Reference ref_1
Reference ref_2
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Visible defects
4.1 General
4.2 Pores, cavities, and sand inclusions
4.3 Scratches, indentations, depressions, and cracks
4.4 Edges
4.5 Other characteristics subject to visual inspection only
5 Material
5.1 Specifications
5.2 Loss of tangential force under temperature effects
6 Raised material caused by marking of rings
7 Machining of periphery and sides — Unintentional deviation from ideal profile and flatness
7.1 General
7.2 Permissible deviations for peripheral surface profile
7.3 Permissible helix
Bibliography
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Section sec_1
Section sec_2
Section sec_3
Section sec_4
Section sec_4.1
Section sec_4.2
Table tab_1
Section sec_4.3
Section sec_4.3.1
Section sec_4.3.2
Section sec_4.3.3
Table tab_2
Section sec_4.4
Section sec_4.4.1
Section sec_4.4.1.1
Table tab_3
Section sec_4.4.1.2
Table tab_4
Section sec_4.4.2
Section sec_4.4.2.1
Section sec_4.4.2.2
Section sec_4.4.2.3
Table tab_5
Table tab_6
Table tab_a
Figure fig_1
Table tab_b
Figure fig_2
Table tab_c
Figure fig_3
Table tab_d
Figure fig_4
Table tab_e
Figure fig_5
Table tab_f
Figure fig_6
Table tab_7
Section sec_4.4.2.4
Table tab_8
Section sec_4.4.3
Section sec_4.4.4
Table tab_9
Section sec_4.5
Section sec_4.5.1
Section sec_4.5.2
Section sec_4.5.3
Section sec_4.5.4
Section sec_4.5.5
Section sec_4.5.6
Section sec_5
Section sec_5.1
Section sec_5.2
Table tab_10
Section sec_6
Table tab_11
Section sec_7
Section sec_7.1
Section sec_7.2
Section sec_7.2.1
Section sec_7.2.2
Section sec_7.2.3
Section sec_7.2.4
Section sec_7.2.5
Section sec_7.2.6
Table tab_12
Section sec_7.3
Table tab_13
Reference ref_1
Reference ref_2
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Visible defects
4.1 General
4.2 Pores, cavities, and sand inclusions
4.3 Scratches, indentations, depressions, and cracks
4.4 Edges
4.5 Other characteristics subject to visual inspection only
5 Material
5.1 Specifications
5.2 Loss of tangential force under temperature effects
6 Raised material caused by marking of rings
7 Machining of periphery and sides — Unintentional deviation from ideal profile and flatness
7.1 General
7.2 Permissible deviations for peripheral surface profile
7.3 Permissible helix
Bibliography