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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
Testing methods for grain harvesting machinery
WITHDRAWN published on 1.1.1987
Selected format:Equipment for harvesting—Combine harvesters—Test procedure
WITHDRAWN published on 23.12.1996
Selected format:Equipment for harvesting - Combine harvesters - Test procedure
WITHDRAWN published on 10.6.2008
Selected format:Hydraulic fluid power--Compensated flow control valves--Mounting surfaces
WITHDRAWN published on 23.7.1987
Selected format:Hydraulic fluid power—Compensated flow control valves—Mounting surfaces
WITHDRAWN published on 16.6.2003
Selected format:Hydraulic fluid power--Modular stack valves--Mountingsurfaces
WITHDRAWN published on 23.7.1987
Selected format:Testing methods for mechanical performance of ordinary concrete
WITHDRAWN published on 1.1.1985
Selected format:Hydraulic fluid power--Pressure control valves (excluding pressure relief valves )sequence valvesunloading valvesthrottle valves and check valves--Mounting surfaces
WITHDRAWN published on 23.7.1987
Selected format:Hydraulic fluid power—Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves—Mounting surfaces
WITHDRAWN published on 22.8.2006
Selected format:Hydraulic fluid power--Pressure relief valves--Mounting surfaces
WITHDRAWN published on 23.7.1987
Selected format:Latest update: 2026-03-25 (Number of items: 2 269 413)
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