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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
Oil-change criterion of railway diesel locomotive engine oils--Test method for determination of total base and pH values (potentiometric titration)
WITHDRAWN published on 1.1.1986
Selected format:Oil-change criterion of railway diesel locomotive engine oils--Blotter spot test method
WITHDRAWN published on 31.1.1986
Selected format:Doors and windows for building—Terminology
WITHDRAWN published on 31.1.1986
Selected format:Size system of opening for doors and windows in building
WITHDRAWN published on 31.1.1986
Selected format:Size system of opening for windows and doors in building
WITHDRAWN published on 30.7.2008
Selected format:Basic size system of side hung steel door ( 32, 40mm solid section)
WITHDRAWN published on 31.1.1986
Selected format:Basic size system of side hung steel window (25mm solid section)
WITHDRAWN published on 31.1.1986
Selected format:Basic size system of side hung steel window (32mm solid section)
WITHDRAWN published on 31.1.1986
Selected format:Inspecting regulation for solid shaped steel window
WITHDRAWN published on 31.1.1986
Selected format:Inspecting regulation for hollow shaped steel window
WITHDRAWN published on 31.1.1986
Selected format:Latest update: 2026-04-28 (Number of items: 2 274 955)
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