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  • BSI
    DD 209:1992, ISO/TR 6624-2:1988 Piston rings up to 200 mm diameter for reciprocating internal combustion engines: specification for half keystone rings
    Edition: 1992
    $316.70
    / user per year

Description of DD 209:1992 1992

This Technical Report specifies the essential dimensional features of HK- and HKB-half keystone rings with narrow ring width types.

Dimension Table 6 and Table 7 allow for the use of cast iron (Table 6) or steel (Table 7). Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the reference for forces. Therefore forces are set using the surface pressure as the reference, in order to minimize the effect of the fluctuation.

The requirements of this Technical Report apply to half keystone rings of reciprocating internal combustion piston engines, up to and including 70 mm diameter for cast iron rings and up to and including 100 mm diameter for steel.



Standard NumberDD 209:1992, ISO/TR 6624-2:1988
TitlePiston rings up to 200 mm diameter for reciprocating internal combustion engines: specification for half keystone rings
StatusRevision Underway
Publication Date1992-05-01
ReplacesBS 5341-3:1976, BS 5341-4:1976, BS 5341-1:1976, BS 5341-2:1977
Identical National Standard OfISO/TR 6624-2:1988
DescriptorsDiameter, Prime movers, Thickness, Internal combustion engines, Pistons, Dimensions, Piston rings, Engine components, Chromium, Reciprocating parts, Metal coatings, Molybdenum, Designations
ICS43.060.10 Engine block and internal components
CommitteeMCE/14
ISBN0 580 20746 3
PublisherBSI
Pages18

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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