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ISO
ISO 6621-4:2015

ISO 6621-4:2015

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

01-05-2024

Superseded by

ISO 6621-4:2024

Language(s)

English

Published date

18-03-2015

Publisher

International Organization for Standardization

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Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
Hardcopy - English
PDF - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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ISO 6621-4:2015 specifies the general characteristics of piston rings for reciprocating internal combustion engines for road vehicles and other applications (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 nominal diameter from 30 mm up to and including 200 mm.

Committee
ISO/TC 22/SC 34
DevelopmentNote
Supersedes ISO/DIS 6621-4. (03/2015)
DocumentType
Standard
Pages
28
PublisherName
International Organization for Standardization
Status
Superseded
SupersededBy
Supersedes
UnderRevision

Standards Relationship
BS ISO 6621-4:2015 Identical
UNI ISO 6621-4 : 1992 Identical
NF ISO 6621-4 : 1989 Identical
DIN 70909:1987-02 Similar to
UNE 26417-4:1994 Identical
DIN ISO 6621-4:1990-06 Identical

BS ISO 6626-3:2008 Internal combustion engines. Piston rings Coil-spring-loaded oil control rings made of steel
DIN V 76624:1990-06 INTERNAL COMBUSTION ENGINES - PISTON RINGS - HALF KEYSTONE RINGS
12/30232970 DC : 0 BS ISO 6623 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - SCRAPER RINGS MADE OF CAST IRON
BS ISO 6624-2:2016 Internal combustion engines. Piston rings Half keystone rings made of cast iron
BS ISO 6621-5:2013 Internal combustion engines. Piston rings Quality requirements
DIN ISO 6622-1:1990-06 INTERNAL COMBUSTION ENGINES; PISTON RINGS; RECTANGULAR RINGS
BS DD212(1992) : 1992 PISTON RINGS UP TO 200mm DIAMETER FOR RECIPROCATING INTERNAL COMBUSTION ENGINES: SPECIFICATION FOR EXPANDER/SEGMENT OIL CONTROL RINGS
ISO 6624-2:2016 Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron
ISO 6627:2011 Internal combustion engines Piston rings Expander/segment oil-control rings
12/30242897 DC : 0 BS ISO 6624-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: HALF KEYSTONE RINGS MADE OF CAST IRON
04/19980487 DC : DRAFT AUG 2004 BS ISO 6621-5 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 5: QUALITY REQUIREMENTS
BS ISO 6624-4:2016 Internal combustion engines. Piston rings Half keystone rings made of steel
16/30340311 DC : DRAFT JUNE 2016 BS ISO 6626-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: COIL-SPRING-LOADED OIL CONTROL RINGS OF NARROW WIDTH MADE OF CAST IRON
15/30320008 DC : 0 BS ISO 6626-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: COIL-SPRING-LOADED OIL CONTROL RINGS MADE OF STEEL
DIN V 76622:1990-06 INTERNAL COMBUSTION ENGINES - PISTON RINGS - RECTANGULAR RINGS WITH NARROW RING WIDTH
SAE J2275_201805 Internal Combustion Engines - Piston Ring-Grooves
ISO 6625:1986 Internal combustion engines Piston rings Oil control rings
ISO 6626:1989 Internal combustion engines — Piston rings — Coil-spring-loaded oil control rings
ISO/TR 6627:1992 Internal combustion engines Piston rings Expander/segment oil control rings
98/716688 DC : DRAFT NOV 1998 ISO/DIS 6624-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: KEYSTONE RINGS MADE OF CAST IRON
BS ISO 6622-2:2013 Internal combustion engines. Piston rings Rectangular rings made of steel
BS ISO 6622-1:2003 Internal combustion engines. Piston rings Rectangular rings made of cast iron
11/30211186 DC : 0 BS ISO 6621-5 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 5: QUALITY REQUIREMENTS
16/30340802 DC : 0 BS ISO 6626-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: COIL-SPRING-LOADED OIL CONTROL RINGS MADE OF CAST IRON
15/30320002 DC : 0 BS ISO 6624-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: KEYSTONE RINGS MADE OF CAST IRON
ISO 6624-3:2017 Internal combustion engines — Piston rings — Part 3: Keystone rings made of steel
BS ISO 6624-3:2017 Internal combustion engines. Piston rings Keystone rings made of steel
ISO 6621-1:2018 Internal combustion engines — Piston rings — Part 1: Vocabulary
11/30211189 DC : 0 BS ISO 6622-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: RECTANGULAR RINGS MADE OF STEEL
ISO 6623:2013 Internal combustion engines — Piston rings — Scraper rings made of cast iron
ISO 6626-2:2013 Internal combustion engines — Piston rings — Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron
ISO/TR 6624-2:1988 Internal combustion engines — Piston rings — Part 2: Half keystone rings
12/30242900 DC : 0 BS ISO 6624-4 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 4: HALF KEYSTONE RINGS MADE OF STEEL
BS ISO 6626-2:2013 Internal combustion engines. Piston rings Coil-spring-loaded oil control rings of narrow width made of cast iron
15/30320005 DC : 0 BS ISO 6624-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: KEYSTONE RINGS MADE OF STEEL
BS ISO 6627:2011 Internal combustion engines. Piston rings. Expander/segment oil-control rings
BS ISO 6623:2013 Internal combustion engines. Piston rings. Scraper rings made of cast iron
BS ISO 6624-1:2017 Internal combustion engines. Piston rings Keystone rings made of cast iron
ISO 6622-2:2013 Internal combustion engines — Piston rings — Part 2: Rectangular rings made of steel
ISO 6626-3:2008 Internal combustion engines Piston rings Part 3: Coil-spring-loaded oil control rings made of steel
ISO 6624-4:2016 Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel
ISO 6621-5:2013 Internal combustion engines Piston rings Part 5: Quality requirements
12/30211192 DC : 0 BS ISO 6626-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: COIL-SPRING-LOADED OIL CONTROL RINGS OF NARROW WIDTH MADE OF CAST IRON
07/30163269 DC : 0 BS ISO 6626-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: COIL-SPRING-LOADED AND NITRIDED OIL CONTROL RINGS MADE OF STEEL
08/30179075 DC : DRAFT SEP 2008 BS ISO 6627 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - EXPANDER/SEGMENT OIL-CONTROL RINGS
ISO/TR 6622-2:1988 Internal combustion engines Piston rings Part 2: Rectangular rings with narrow ring width
ISO 6622-1:2003 Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron
ISO 6624-1:2017 Internal combustion engines — Piston rings — Part 1: Keystone rings made of cast iron

ISO 6622-2:2013 Internal combustion engines — Piston rings — Part 2: Rectangular rings made of steel
ISO 6621-2:2003 Internal combustion engines Piston rings Part 2: Inspection measuring principles
ISO 6624-2:2016 Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron
ISO 6624-3:2017 Internal combustion engines — Piston rings — Part 3: Keystone rings made of steel
ISO 6626-2:2013 Internal combustion engines — Piston rings — Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron
ISO 6624-1:2017 Internal combustion engines — Piston rings — Part 1: Keystone rings made of cast iron
ISO 6624-4:2016 Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel
ISO 6507-3:2005 Metallic materials Vickers hardness test Part 3: Calibration of reference blocks
ISO 6625:1986 Internal combustion engines Piston rings Oil control rings
ISO 6622-1:2003 Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron
ISO 6623:2013 Internal combustion engines — Piston rings — Scraper rings made of cast iron
ISO 6627:2011 Internal combustion engines Piston rings Expander/segment oil-control rings
ISO 6621-1:2007 Internal combustion engines Piston rings Part 1: Vocabulary
ISO 6626-3:2008 Internal combustion engines Piston rings Part 3: Coil-spring-loaded oil control rings made of steel

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