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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
Information processing systems—Open Systems Interconnection—Connection oriented presentation service definition
WITHDRAWN published on 30.8.1995
Selected format:Information processing systems—Open Systems Interconnection—Connection oriented presentation protocol specification
WITHDRAWN published on 30.8.1995
Selected format:Information processing—Program flow for processing sequential files in terms of record groups
WITHDRAWN published on 30.8.1995
Selected format:Information technology—Telecommunications and information exchange between systems—High-level data link control (HDLC)procedures—General purpose XID frame information field content and format
WITHDRAWN published on 30.8.1995
Selected format:Rules for tobacco seed (blue mold) quarantine
WITHDRAWN published on 28.8.1995
Selected format:Series of conical tapers and taper angles
WITHDRAWN published on 1.1.1989
Selected format:Geometrical product specifications(GPS)--Series of conical tapers and taper angles
WITHDRAWN published on 15.9.2001
Selected format:Conical shaft ends
WITHDRAWN published on 9.1.1990
Selected format:General specification for polytetrafluoroethylene bellows compensators
WITHDRAWN published on 8.9.1995
Selected format:Protective clothing for welders
WITHDRAWN published on 11.9.1995
Selected format:Latest update: 2025-11-27 (Number of items: 2 248 457)
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