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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
Specification of the steam converting valve forfossil power stations
WITHDRAWN published on 31.3.1989
Selected format:Steam converting valve for power stations
WITHDRAWN published on 14.9.2005
Selected format:Specification of control valves for fossil power stations
WITHDRAWN published on 31.3.1989
Selected format:The methods of performance test for positive displacement & centrifugal water-chilling units and heat pump
WITHDRAWN published on 10.1.2001
Selected format:Type and basic parameters for small single-stage reciprocating refrigerant compressors
WITHDRAWN published on 1.1.1989
Selected format:Specification for small single-stage reciprocating refrigerant compressors
WITHDRAWN published on 1.1.1989
Selected format:Methods of test for small single-stage reciprocating refrigerant compressors
WITHDRAWN published on 1.1.1989
Selected format:Types and basic parameters for middle single-stage reciprocating refrigerant compressors
WITHDRAWN published on 1.1.1989
Selected format:Specification for middle single-stage reciprocating refrigerant compressors
WITHDRAWN published on 1.1.1989
Selected format:Methods of test for middle single-stage reciprocating refrigerant compressors
WITHDRAWN published on 25.3.1989
Selected format:Latest update: 2026-01-29 (Number of items: 2 258 013)
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