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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
Non-destructive testing—Image quality of radiographs—Part 3:Image quality classes for ferrous metals
WITHDRAWN published on 26.5.2009
Selected format:Non-destructive testing—Image quality of radiographs—Part 4:Experimental evaluation of image quality values and image quality tables
WITHDRAWN published on 26.5.2009
Selected format:Non-destructive testing—Image quality of radiographs—Part 5:Image quality indicators (duplex wire type)—Determination of image unsharpness value
WITHDRAWN published on 26.5.2009
Selected format:Non-destructive testing—Ultrasonic examination—Time-of-flight diffraction technique as a method for detection and sizing of discontinuities
WITHDRAWN published on 26.5.2009
Selected format:Non-destructive testing—Test method for ultrasonic testing by surface wave
WITHDRAWN published on 26.5.2009
Selected format:Determination of colour absorption and fixation rate for reactive dyes
WITHDRAWN published on 1.1.1980
Selected format:Reactive dyestuffs—Determination of degree of exhaustion and degree of fixation
WITHDRAWN published on 5.3.2003
Selected format:Reactive dyes—Determination of degree of fixation
WITHDRAWN published on 23.1.2006
Selected format:Reactive dyes—Determination of degree of fixation
WITHDRAWN published on 8.7.2014
Selected format:Low-speed goods vehicles—Operating position dimensions of driver
WITHDRAWN published on 4.6.2009
Selected format:Latest update: 2026-04-30 (Number of items: 2 275 280)
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