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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
The methode of performance test for positive displacement refrigerant compressors
WITHDRAWN published on 9.6.2004
Selected format:Aluminum-coated nickel composite powders
WITHDRAWN published on 16.1.1986
Selected format:Metallic materials--Charpy impact test at elevated temperatures
WITHDRAWN published on 1.1.1986
Selected format:Method for surface seawater exposure corrosion tests of metallic materials
WITHDRAWN published on 14.1.1986
Selected format:Corrosion of metals and alloys—Guidelines for exposing and evaluating metals and alloys in surface sea water
WITHDRAWN published on 13.5.2005
Selected format:Methods for ultrasonic testing of seamless steel pipe and tubing
WITHDRAWN published on 1.1.1986
Selected format:Seamless steel pipe and tubing—Methods for ultrasonic testing
WITHDRAWN published on 27.9.1996
Selected format:Seamless steel pipe and tubing methods for ultrasonic testing
WITHDRAWN published on 5.8.2008
Selected format:Determination of hermeticity of expansion alloys
WITHDRAWN published on 14.1.1986
Selected format:Surface discontinuities of fasteners on bolts, screws and studs for general requirements
WITHDRAWN published on 17.1.1986
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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