GB/T 1149.4-2021

Active

Internal combustion engines—Piston rings—Part 4:Quality requirements

内燃机活塞环第4部分：质量要求

Standard Type

GBT

ICS

27.020

CCS

J92

Status

Active

Issue Date

2021-03-09

Implementation

2021-10-01

Centralized Committee

中国机械工业联合会

Issuing Authority

国家市场监督管理总局、中国国家标准化管理委员会

Application Summary AI generated

This standard specifies the quality requirements for piston rings used in internal combustion engines, covering material specifications, dimensional tolerances, surface finish, and inspection methods. It is applied in the manufacturing and quality control of piston rings for automotive, marine, and industrial engine applications, ensuring reliability and performance in engine assembly and testing.

Related Standards

JB/T 6728.2-2008 Internal combustion engines - Camshafts - Part 2: Wedge-cross rolling blanks JB/T 51185-1999 Volute Mixed-Flow Pump - Product Quality Grading (Internal Use) JB/T 51116-1999 Internal combustion engines - Oil pumps - Product quality grading (Internal use) JB/T 51118-1999 Internal combustion engines - Full round main bearings - Product quality grading (Internal use) JB/T 51119-1999 Internal combustion engines - Valve tappets - Product quality grading (Internal use) JB/T 51111-1999 Internal combustion engines - Paper element oil filter assemblies - Product quality grading (Internal use) JB/T 51115-1999 Diesel engines - Hydraulic speed governors - Product quality grading (Internal use) JB/T 51114-1999 Internal combustion engines - Cooling water pumps - Product quality grading (Internal use)

Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.