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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
Calculation of load capacity of bevel gears—Part 32:ISO rating system for bevel and hypoid gears—Sample calculation for scuffing load capacity
Standard published on 3.12.2025
Selected format:Simplified methods for the calculation of load capacity of involute cylindrical gears for general machines
Standard published on 10.12.1988
Selected format:Gassing of insulating liquids under electrical stress and ionization
Standard published on 3.12.2007
Selected format:Test methods for electroheating and electromagnetic processing installations—Part 1: General
Standard published on 30.8.2019
Selected format:Test methods for electroheat installations—Part 11:Submerged-arc furnaces
Standard published on 24.2.2016
Selected format:Test methods for electroheating installations—Part 12:Infrared electroheating installations
Standard published on 31.3.2020
Selected format:Test methods for electroheating and electromagnetic processing installations—Part 2: Direct arc furnaces
Standard published on 30.8.2019
Selected format:Test methods for electroheat installationsPart 3: Induction channel and induction crucible furnaces
Standard published on 5.12.2014
Selected format:Test methods for electroheat installtions - Part 31: High-frequency induction heating installation- Test methods for the determination of power output of the generator
Standard published on 3.12.2007
Selected format:Test methods for electroheating and electromagnetic processing installations—Part 32Induction through-heating installations
Standard published on 21.5.2021
Selected format:Latest update: 2026-04-17 (Number of items: 2 274 270)
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