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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
Asphalt materials—Determination of specific gravity and density—Pycnometer method
WITHDRAWN published on 28.4.1988
Selected format:Crude oil—Determination of water—Distillation method
WITHDRAWN published on 24.3.1988
Selected format:Circlips for holes. Type A
WITHDRAWN published on 2.7.1986
Selected format:Circlips for hole--Type B
WITHDRAWN published on 6.3.1967
Selected format:Test method for the resistance of refractories to slag attack
WITHDRAWN published on 24.3.1988
Selected format:Dense refractory castables--Determination of pyrometric cone equivalent (refractoriness)
WITHDRAWN published on 1.1.1988
Selected format:Dense refractory castables--Determination of bulk density and apparent porosity
WITHDRAWN published on 1.1.1988
Selected format:Dense refractory castables--Determination of cold modulus of rupture and cold crushing strength
WITHDRAWN published on 1.1.1988
Selected format:Dense refractory castables--Evaluation of consistency test and preparation of test-pieces
WITHDRAWN published on 1.1.1988
Selected format:Dense refractory castables--Determination of linear change
WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2026-01-01 (Number of items: 2 253 680)
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