ISO 6621-4:2003Withdrawn

Internal combustion engines — Piston rings — Part 4: General specifications

Moteurs à combustion interne — Segments de piston — Partie 4: Spécifications générales

Abstract / scope

ISO 6621-4:2003 specifies the general characteristics of piston rings for both reciprocating internal combustion engines and compressors (the individual dimensional criteria for these 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 diameter greater than or equal to 200 mm.

Life cycle

Replaces

ISO 6621-4:1988WithdrawnInternal combustion engines — Piston rings — Part 4: General specificationsInternational Standard · Published 29 Dec 1988 · ISO/TC 22

Replaced by

ISO 6621-4:2015WithdrawnInternal combustion engines — Piston rings — Part 4: General specificationsInternational Standard · Published 18 Mar 2015 · ISO/TC 22/SC 34