BS 5341-6.5:1992

Committees responsible
National foreword
Vocabulary
0. Introduction
1. Scope and field of application
2. References
3. Terminology
4. Visible defects
5. Material
6. Raised material caused by marking of rings
7. Machining of periphery and sides - Unintentional
    departure from ideal profile and flatness
Tables
1. Permissible values of size, number and spacing of
    pores, cavities and sand inclusions
2. Permissible size of indentations and depressions
3. Maximum size of burrs for all sizes of ring
4. Edge material removal in deburr operations
5. Permissible size of chipping and defects on uncoated
    rings on peripheral edges, peripheral edges of the
    gap and outside gap corners
6. Permissible size of chipping and defects on coated
    rings with chromium-plated periphery, on peripheral
    edges, peripheral edges of the gap and outside
    gap corners
7. Permissible size of chipping and defects on spray-
    coated rings on peripheral edges, peripheral edges
    of the gap and outside gap corners
8. Permissible size of chipping and defects on chamfers
    at the peripheral edge and peripheral edge of the gap
9. Permissible size of chipping and defects on inside
    gap corners
10. Test conditions to measure tangential force loss
11. Maximum permitted raised material
12. Permissible side face unevenness in the
    circumferential direction
13. Permissible wind
Figures
1. Chipping on peripheral edges of the gap
2. Chipping on peripheral edges
3. Chipping on outside gap corners
4. Combination of figures 1 and 3
5. Chipping on oppposite gap corners
6. Chipping on chamfers

Describes those quality aspects which are capable of definition but not normally found on a drawing specification. It covers single-piece piston rings of grey, carbidic, malleable, spheroidal graphite cast iron or steel, multi-piece piston rings consisting of cast iron parts and spring components and single-piece and multi-piece rings of steel, in the form of strip steel components or steel segments with spring expander components. Does not establish acceptable quality levels. Applies to all rings up to and including 200 mm diameter covered by the above classification for both reciprocating internal combustion engines and compressors. Includes visible defects, material, raised material caused by marking of rings and machining of periphery and sides - unintentional departure from ideal profile and flatness.