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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
Machine tools--Lubrication systems
WITHDRAWN published on 1.1.1986
Selected format:Hydraulic fluid power—Cylinders—Piston seal housings incorporating bearing rings—Dimensions and tolerances
WITHDRAWN published on 22.7.1986
Selected format:Hydraulic fluid power—Cylinders—Reciprocating—Housings for rod wipers—Dimensions and tolerances
WITHDRAWN published on 22.7.1986
Selected format:Hydraulic fluid power—Cylinders—Reciprocating—Housings for rod wipers—Dimensions and tolerances
WITHDRAWN published on 14.1.2008
Selected format:Laboratory glassware—Methods for thermal shock test
WITHDRAWN published on 22.7.1986
Selected format:Chemical reagent—Ammonium chloride
WITHDRAWN published on 20.9.1988
Selected format:-
WITHDRAWN published on 1.1.1986
Selected format:Glass—Resistance to attack by a boiling aqueous solution of mixed alkali—Method of test and classification
WITHDRAWN published on 24.7.1997
Selected format:Glass—Resistance to attack by hydrochloric acid at 100—Flame emission or atomic absorption spectrometric method
WITHDRAWN published on 22.7.1986
Selected format:Glass-Resistance to attack by hydrochloric acid at 100 - Flame emission or flame atomic absorption spectrometric method
WITHDRAWN published on 5.12.2007
Selected format:Latest update: 2026-09-11 (Number of items: 2 300 165)
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