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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
Methods for the calculation of scuffing load capacity for bevel gears
WITHDRAWN published on 6.5.1989
Selected format:Cleanliness of gear units
WITHDRAWN published on 1.1.1989
Selected format:Light weight gas turbines exhaust smokes measurement
WITHDRAWN published on 22.6.1989
Selected format:Hand long fluted taper 1: 50 pin reamers
WITHDRAWN published on 1.1.1984
Selected format:Gas emissions measurement of light weight gas turbines
WITHDRAWN published on 22.6.1989
Selected format:Light weight gas turbine operation and maintenance
WITHDRAWN published on 22.6.1989
Selected format:The general principle of surface preparation of metallic substrate for thermal spraying
WITHDRAWN published on 29.6.1989
Selected format:Thermal spraying coating—Nondestructive methods for measurement of thickness
WITHDRAWN published on 29.6.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Phosphate conversion coatings for metals
WITHDRAWN published on 25.7.1997
Selected format:Latest update: 2025-12-28 (Number of items: 2 253 436)
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