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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
Methods for measuring the thermoelectric force of noble metal and base metal thermocouple wires
Standard published on 1.12.2010
Selected format:Design code for mechanical components in nuclear island of pressurized water reactor nuclear power plants
Standard published on 31.12.2019
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 1: General principle
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 2Class 1 components
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 3: Class 2 components
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 4: Class 3 components
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 5Small components
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 6: Reactor vessel internals
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 7Supports
Standard published on 28.2.2025
Selected format:Design specification for mechanical components in nuclear island of pressurized water reactor nuclear power plants—Part 8Low pressure or atmospheric storage tanks
Standard published on 28.2.2025
Selected format:Latest update: 2026-06-15 (Number of items: 2 282 497)
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