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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
Classification for quality of coal—Part 3:Calorific value
WITHDRAWN published on 26.9.2010
Selected format:Graduation of physical performances for building curtain walls
WITHDRAWN published on 24.9.1994
Selected format:Test method of air permeability performance for building curtain walls
WITHDRAWN published on 24.9.1994
Selected format:Test method of deformation under wind pressure for building curtain walls
WITHDRAWN published on 24.9.1994
Selected format:Test method of air permeability, water tightness, wind load resistance performance for curtain walls
WITHDRAWN published on 11.9.2007
Selected format:Test method of water penetration performance for building curtain walls
WITHDRAWN published on 24.9.1994
Selected format:Lightweight aggregate concrete small hollow block
WITHDRAWN published on 24.9.1994
Selected format:Lightweight aggregate concrete small hollow block
WITHDRAWN published on 30.5.2002
Selected format:wool
WITHDRAWN published on 28.4.1993
Selected format:Complete sets of rural-housing concrete elements
WITHDRAWN published on 24.9.1994
Selected format:Latest update: 2026-01-22 (Number of items: 2 257 357)
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