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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
Standard radiographs for inspection grading of gas porosity(round) in aluminum alloy casting
WITHDRAWN published on 8.5.1989
Selected format:Mechanical vibration of large rotating machines with speed range from 10 to 200 r/s--Measurement and evaluation of vibration severity in situ
WITHDRAWN published on 8.5.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Mechanical vibration of non-reciprocating machines—Measurements on rotating shafts and evaluation criteria—Part 2:Large land-based steam turbine generator sets
WITHDRAWN published on 6.6.1997
Selected format:Mechanical vibration—Evaluation of machines vibration by measurements on rotating shafts—Part 2:Land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1 500 r/min,1 800 r/min,3 000 r/min and 3 600 r/min
WITHDRAWN published on 30.4.2007
Selected format:Mechanical vibration of non-reciprocating machines—Measurements on rotating shafts and evaluation criteria—Part 3:Coupled industrial machines
WITHDRAWN published on 8.4.1999
Selected format:Mechanical vibration of non-reciprocating machines—Measurements on rotating shafts and evaluation criteria—Part 4:Gas turbine sets
WITHDRAWN published on 8.4.1999
Selected format:Mechanical vibration of non-reciprocating machines—Measurements on rotating shafts and evaluation criteria—Part 5:Machine sets in hydraulic power generating and pumping plants
WITHDRAWN published on 20.5.2002
Selected format:Experimental determination of mechanical mobility—Basic definitions and transducers
WITHDRAWN published on 8.5.1989
Selected format:Vibration and shock—Experimental determination of mechanical mobility—Part 1:Basic definitions and transducers
WITHDRAWN published on 2.6.2006
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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