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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
Metallic and other non-organic coatings-General rules for corrosion tests applicable for storage conditions
WITHDRAWN published on 29.6.1989
Selected format:Metallic coatings-Measurement of coating thickness—Profilometric method
WITHDRAWN published on 29.6.1989
Selected format:Metallic coatings—Electroplated coatings of chromium for engineering purposes
WITHDRAWN published on 29.6.1989
Selected format:Machine taper--1: 50 pin reamers with Morse taper shanks
WITHDRAWN published on 1.1.1984
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Method of static load test for bus top
WITHDRAWN published on 4.7.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Information processing--Data interchange on 200mm flexible disk cartridges using modified frequency modulation recording at 13262 ftprad1.9 tpmmon both sides--Part 1:Dimensional physical and magnetic characteristics
WITHDRAWN published on 20.5.1989
Selected format:Information processing--Datainterchange on 200mm flexible disk cartridges using modified frequency modulation recording at 13262 ftprad 1.9 tpmm on both sides--Part 2:Track format
WITHDRAWN published on 20.5.1989
Selected format:Information processing -- Unrecorded hard-sectored130mm flexible disk cartridges one or two-sided use--Dimensional physical and magnetic characteristics
WITHDRAWN published on 20.5.1989
Selected format:Latest update: 2025-12-28 (Number of items: 2 253 436)
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