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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
Hardness testing method of the metal deposits for the light industrial products--Microscopic hardness tester method
WITHDRAWN published on 1.1.1986
Selected format:Porosity testing method of the metal deposits for the light industrial products
WITHDRAWN published on 1.1.1986
Selected format:Testing method of the chemical protective coatings of the ferrous metal for the light industrial products--Dipping spot test
WITHDRAWN published on 1.1.1986
Selected format:Testing method of the white chromatic conversion coatings existence and the corrosion resistance of the zinc deposits for the light industrial products
WITHDRAWN published on 1.1.1986
Selected format:Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Neutral salt spraying test (NSS)
WITHDRAWN published on 1.1.1986
Selected format:Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Acetic salt spraying test (ASS)
WITHDRAWN published on 1.1.1986
Selected format:Marine forged steel male thread stop valves
WITHDRAWN published on 15.12.1983
Selected format:Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Copper accelerated salt spraying test (CASS)
WITHDRAWN published on 1.1.1986
Selected format:Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Corrodokote test (CORR)
WITHDRAWN published on 1.1.1986
Selected format:Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products--Sulphur dioxide test
WITHDRAWN published on 1.1.1986
Selected format:Latest update: 2026-04-26 (Number of items: 2 274 794)
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