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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 methods of technical specification for pre-insulated directly buried district heating pipes
WITHDRAWN published on 31.12.2012
Selected format:Prefabricated directly buried insulating pipes and fittings with polyurethane [PUR]foamed-plastics and high density polyethylene [PE]casing pipes
WITHDRAWN published on 31.12.2012
Selected format:Solar-grade casting multi-crystalline silicon brick
WITHDRAWN published on 31.12.2012
Selected format:Multi-crystalline silicon wafer for solar cell
WITHDRAWN published on 31.12.2012
Selected format:Practice for evaluation of polocrystalline silicon rods by float-zone crystal growth and spectroscopy
WITHDRAWN published on 31.12.2012
Selected format:Execution requirements for quality problem close loop of aerospace product
WITHDRAWN published on 31.12.2012
Selected format:Execution requirements for quality problem close loop of aerospace product
WITHDRAWN published on 31.12.2012
Selected format:Launch-vehicle-to-spacecraft flight environments telemetry data processing requirement
WITHDRAWN published on 31.12.2012
Selected format:Cotton canvas for rubber industry
WITHDRAWN published on 5.5.1994
Selected format:Rolling bearings with helically woundcylindrical rollers--Types and basic dimensions
WITHDRAWN published on 8.4.1964
Selected format:Latest update: 2025-05-10 (Number of items: 2 198 913)
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