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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
High pressure alloy steel tubes for polyethylene service
WITHDRAWN published on 30.10.2009
Selected format:Welded austenitic stainless steel tubes for boiler and heat-exchanger
WITHDRAWN published on 30.10.2009
Selected format:Quality alloy mould steels
WITHDRAWN published on 30.10.2009
Selected format:Steel bar for quenched and tempered automotive crankshaft
WITHDRAWN published on 30.10.2009
Selected format:Hot-rolled steel bars for quenched and tempered automobile crankshafts
WITHDRAWN published on 6.3.2020
Selected format:Ductile iron pipes and fittings—Polyurethane coatings
WITHDRAWN published on 30.10.2009
Selected format:Cr-Mn-W series of abrasion resistant iron castings
WITHDRAWN published on 30.10.2009
Selected format:-
WITHDRAWN published on 1.1.1982
Selected format:-
WITHDRAWN published on 4.2.1985
Selected format:Metallic materials—Tube—Flattening test
WITHDRAWN published on 11.11.1997
Selected format:Latest update: 2026-08-18 (Number of items: 2 297 400)
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