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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Reciprocating internal combustion engines - Performance - Part 4: Speed governing
Standard published on 3.9.2012
Selected format:Reciprocating internal combustion engines--Performance--Part 5: Torsional vibrations
Standard published on 19.5.2003
Selected format:Reciprocating internal combustion engines—Performance—Part 6: Overspeed protection
Standard published on 31.10.2025
Selected format:Type LT highly flexible friction clutch
Standard published on 9.8.2010
Selected format:Leaf chains, clevises and sheaves—Dimensions, measuring forces, tensile strengths and dynamic strengths
Standard published on 2.12.2025
Selected format:Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 1: General guidelines
Standard published on 5.11.2012
Selected format:Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 2: Land-based steam turbines and generators in excess of 50MW with normal operating speeds of 1500r/min1800r/min3000r/min and 3600r/min
Standard published on 5.11.2012
Selected format:Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 3Industrial machines with nominal power above 15 kW and nominal speeds between 120 r/min and 15 000 r/min when measured in situ
Standard published on 30.12.2011
Selected format:Mechanical vibration—Evaluation of machine vibration by measurements on non-rotating parts—Part 4: Gas turbine sets with fluid-film bearings
Standard published on 31.12.2015
Selected format:Mechanical vibration--Evaluation of machine vibration by measurements on non-rotating parts--Part 5:Machine sets in hydraulic power generating and pumping plants
Standard published on 20.5.2002
Selected format:Latest update: 2026-08-11 (Number of items: 2 292 404)
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