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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
Industrial-process control valves—Part 4:Inspection and routine testing
WITHDRAWN published on 9.9.2005
Selected format:Industrial-process control valves—Part 5:Marking
WITHDRAWN published on 21.1.1998
Selected format:Industrial-process control valves—Part 7:Control valve data sheet
WITHDRAWN published on 21.1.1998
Selected format:Industrial-process control valves—Part 8:Noise considerations Section 1:Laboratory measurement of noise generated by aerodynamic flow through control valves
WITHDRAWN published on 21.1.1998
Selected format:Industrial-process control valves—Part 2-3:Flow capacity—Test procedures
WITHDRAWN published on 9.9.2005
Selected format:Alternating current static watt-hour meters for active energy (classes 1 and 2)
WITHDRAWN published on 21.1.1998
Selected format:Alternating current static watt-hour meters for active energy(Classes 1 and 2)
WITHDRAWN published on 8.10.2002
Selected format:Electricity metering equipment(a.c.)—General requirements,tests and test conditions—Part 11:Metering equipment
WITHDRAWN published on 14.3.2006
Selected format:Particular requirements for multi-function electricity meters
WITHDRAWN published on 18.10.2007
Selected format:Electricity metering equipment (a.c.)—Particular requirements—Part 2:Static harmonic meters for active energy
WITHDRAWN published on 10.10.2013
Selected format:Latest update: 2026-04-22 (Number of items: 2 274 512)
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