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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
Test method for the flexure strength of impermeable graphite materials
WITHDRAWN published on 2.6.1992
Selected format:Test method for flexure strength of impermeable graphite materials
WITHDRAWN published on 24.9.2002
Selected format:Test method for compressive strength of impermeable graphite materials
WITHDRAWN published on 2.6.1992
Selected format:Test method for compressive strength of impermeable graphite materials
WITHDRAWN published on 24.9.2002
Selected format:Method for impact testing of impermeable graphite materials
WITHDRAWN published on 2.6.1992
Selected format:Test method for impact of impermeable graphite materials
WITHDRAWN published on 24.9.2002
Selected format:Test method of impermeable graphite materials—Part 4:Impact strength
WITHDRAWN published on 3.9.2014
Selected format:The general principles of economical operation for fans (pumpscompressors) system of alternating-current electric drive
WITHDRAWN published on 4.6.1992
Selected format:The methods of electric power balance test and calculation in fan system
WITHDRAWN published on 4.6.1992
Selected format:Measurement and calculation methods of electric energy balance for pumps systems
WITHDRAWN published on 4.6.1992
Selected format:Latest update: 2026-04-21 (Number of items: 2 274 412)
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