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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
Seamless steel tubes and pipes for high pressure boiler
WITHDRAWN published on 10.10.1995
Selected format:Seamless steel tubes and pipes for high pressure boiler
WITHDRAWN published on 24.10.2008
Selected format:Seamless steel tubes and pipes for high pressure boiler
WITHDRAWN published on 24.10.2008
Selected format:Seamless steel tubes and pipes for high pressure boiler
WITHDRAWN published on 29.12.2017
Selected format:Seamless steel tubes and pipes for high pressure boiler
WITHDRAWN published on 29.12.2017
Selected format:Seamless steel tube blank for high pressure boiler
WITHDRAWN published on 1.1.1989
Selected format:Carbon and carbon-manganese steel seamless steel tubes and pipes for ship
WITHDRAWN published on 1.11.1999
Selected format:Carbon and carbon-manganese steel seamless steel tubes and pipes for ship
WITHDRAWN published on 30.10.2009
Selected format:Steel plate with through-thickness characteristics
WITHDRAWN published on 24.8.1985
Selected format:Steel plates with through-thickness characteristics
WITHDRAWN published on 23.12.2010
Selected format:Latest update: 2026-11-11 (Number of items: 2 209 289)
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