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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
Corrosion of metals and alloys--Stress corrosion testing--Part 5:Preparation and useof C-ring specimens
Standard published on 7.12.1998
Selected format:Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of pre-cracked specimens for tests under constant load or constant displacement
Standard published on 14.5.2007
Selected format:Corrosion of metals and alloys—Stress corrosion testing—Part 7: Slow strain rate testing
Standard published on 14.10.2017
Selected format:Corrosion of metals and alloys-Stress corrosion test Part8:Preparation and use of specimens to evaluate weldments
Standard published on 13.5.2005
Selected format:Corrosion of metal and alloys - Stress corrosion testing - Part 9: Preparation and use of pre-cracked specimens for tests under rising load or rising displacement
Standard published on 14.5.2007
Selected format:Specification for tour guide service
Standard published on 28.12.2023
Selected format:Specifications for optical fibre test methods—Part 10: Measurement methods and test procedures—General and guidance
Standard published on 30.4.2021
Selected format:Specifications for optical fibre test methods—Part 20: Measurement methods and test procedures for dimensions—Fibre geometry
Standard published on 30.4.2021
Selected format:Specifications for optical fibre test methods - Part 21: Measurement methods and test procedures for dimensions - Coating geometry
Standard published on 31.3.2008
Selected format:Specifications for optical fibre test methods - Part 22: Measurement methods and test procedures for dimensions - Length measurement
Standard published on 31.3.2008
Selected format:Latest update: 2026-06-09 (Number of items: 2 281 484)
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