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Standards GB - Chinese national standards - Page 4977

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

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GB/T 5213-2019

Cold rolled low carbon steel sheet and strip

Standard published on 25.3.2019

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GB/T 5216-2014

Structural steel with specified hardenability bands

Standard published on 5.12.2014

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GB/T 5223-2025

Steel wire for prestressing of concrete

Standard published on 5.10.2025

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GB/T 5223.3-2017

Steel bars for the prestressing of concrete

Standard published on 28.2.2017

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GB/T 5224-2023

Steel strand for prestressed concrete

Standard published on 6.8.2023

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GB/T 5226.1-2019

Electrical safety of machinery—Electrical equipment of machines—Part 1:General requirements

Standard published on 4.6.2019

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GB 5226.3-2005

Sefety of machinery-Eletrical equipment of machines-Part 11:Requirements for HV equipment for voltages above 1000Va.c.or 1500Vd.c.and not exceeding 36kV

Standard published on 9.9.2005

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GB/T 5226.31-2017

Electrical safety of machinery—Electrical equipment of machines—Part 31:Particular safety and EMC requirements for sewing machines, units and systems

Standard published on 14.10.2017

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