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GB/T 1149.4-2021Internal combustion engines - Piston rings - Part 4: Quality requirements (English PDF)

内燃机活塞环第4部分：质量要求

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

March 9, 2021

Implementation date

October 1, 2021

Scope

GB/T 1149.4-2021 is the English-translated version of 内燃机活塞环第4部分：质量要求.

GB/T 1149.4-2021 is the Chinese standard "Internal combustion engines - Piston rings - Part 4: Quality requirements". Its scope clause reads: This part of GB/T 1149 specifies product quality requirements that are not usually expressed in technical requirements on drawings.

This section applies to the following piston rings. ---Integral cast iron ring or steel compression ring; ---Combined piston ring (oil ring), composed of cast iron parts and spring parts; ---Single type and combined steel oil ring, namely steel spiral spring oil ring and steel belt combined oil ring.

This part supplements the limits of some quality characteristics stipulated in the inspection method standard (ISO 6621-2), and also stipulates those that have not been The quality characteristics of recognized quantitative inspection methods, such as surface defects, require normal vision (or wearing corrective glasses) to be inspected without With the help of any magnifying device.

These quality characteristics specified in this part are for the various types of piston ring rings specified in other parts of GB/T 1149. Complement of quality characteristics such as height, radial thickness and closed gap tolerance.

This section does not specify the acceptable quality level value (AQL), which shall be agreed upon by both parties in accordance with ISO 2859 when necessary.

This part specifies the quality requirements for reciprocating internal combustion engine piston rings used for road vehicles and other purposes, and applies to cylinder diameters ranging from Piston rings of 30mm~200mm. Its clauses include vocabulary).

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Document preview — GB/T 1149.4-2021

National Standard of the People's Republic of China

Classification: J 92

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Surface defects
4.1 General
4.2 Porosity, stomata and blisters
4.3 Scratches, indentations, pits and cracks
4.4 Edge
4.5 Other items inspected only with the naked eye
5 Material
5.1 Material specifications
5.2 The effect of temperature on the disappearance of tangential elasticity
6 The height of the protruding surface of the piston ring mark
7 Machining of outer circular surface and side surface-deviation from ideal contour and plane of non-design requirements
7.1 General
7.2 Permissible deviation of the outer circular surface profile
7.3 Allowable value of warpage

1 Scope

This part of GB/T 1149 specifies product quality requirements that are not usually expressed in technical requirements on drawings.

This section applies to the following piston rings.

---Integral cast iron ring or steel compression ring;

---Combined piston ring (oil ring), composed of cast iron parts and spring parts;

---Single type and combined steel oil ring, namely steel spiral spring oil ring and steel belt combined oil ring.

This part supplements the limits of some quality characteristics stipulated in the inspection method standard (ISO 6621-2), and also stipulates those that have not been

The quality characteristics of recognized quantitative inspection methods, such as surface defects, require normal vision (or wearing corrective glasses) to be inspected without

With the help of any magnifying device. These quality characteristics specified in this part are for the various types of piston ring rings specified in other parts of GB/T 1149.

Complement of quality characteristics such as height, radial thickness and closed gap tolerance.

This section does not specify the acceptable quality level value (AQL), which shall be agreed upon by both parties in accordance with ISO 2859 when necessary.

This part specifies the quality requirements for reciprocating internal combustion engine piston rings used for road vehicles and other purposes, and applies to cylinder diameters ranging from

Piston rings of 30mm~200mm.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article

Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.

ISO 6621-1 Piston rings for internal combustion engines Part 1.Terminology (Internalcombustionengines-Pistonrings-Part

1 Vocabulary)

ISO 6621-3 Piston Rings for Internal Combustion Engines Part 3.Material Specification (Internalcombustionengines-Pistonrings-

Part 3.Materialspecifications)

ISO 6622 (alparts) Internal combustion engines-Pistonrings

ISO 6623 Internal combustion engines-Pistonrings-Scraper ringsmadeofcastiron)

ISO 6624(alparts) Internal combustion engines-Pistonrings

ISO 6625 Internal combustion engines-Pistonrings-Oilcontrol rings)

ISO 6626 Internal combustion engines-Pistonrings-Coil- spring-loadedoilcontrolrings)

ISO 6626-2 Internal combustion engine piston ring Part 2.Thin cast iron spiral spring oil ring (Internalcombustionengines-

Pistonrings-Part 2.Coil-spring-loadedoilcontrolringsofnarrowwidthmadeofcastiron)

ISO 6626-3 Piston Rings for Internal Combustion Engines Part 3.Steel Coil Spring Oil Rings (Internalcombustionengines-

Pistonrings-Part 3.Coil-spring-loadedoilcontrolringsmadeofsteel)

ISO 6627 internal combustion engine piston ring steel belt combination oil ring (Internalcombustionengines-Pistonrings-Ex- pander/segmentoil-controlrings)

GB/T 1859.1 | GB/T 1148 | JB/T 6729 | GB/T 1149.12 | GB/T 1149.11 | GB/T 1149.8 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 6621

Cited by

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