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Standards GB - Chinese national standards - Page 4213

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 42918.2-2023

Plastics—Thermoplastic polyurethanes for moulding and extrusion—Part 2: Preparation of test specimens and determination of properties

Standard published on 27.11.2023

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GB/T 42918.3-2025

Plastics—Thermoplastic polyurethanes for moulding and extrusion—Part 3Test method for distinction between ether and ester polyurethanes

Standard published on 29.8.2025

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GB/T 42919.1-2023

Plastics—Determination of thermal conductivity and thermal diffusivity—Part 1: General principles

Standard published on 6.8.2023

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GB/T 42919.2-2025

Plastics—Determination of thermal conductivity and thermal diffusivity—Part 2: Transient plane heat source (hot disc) method

Standard published on 2.12.2025

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GB/T 42919.3-2023

Plastics—Determination of thermal conductivity and thermal diffusivity—Part 3 : Temperature wave analysis method

Standard published on 6.8.2023

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GB/T 42919.4-2023

Plastics—Determination of thermal conductivity and thermal diffusivity—Part 4:Laser flash method

Standard published on 6.8.2023

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GB/T 42919.6-2023

Plastics—Determination of thermal conductivity and thermal diffusivity—Part 6Comparative method for low thermal conductivities using a temperature-modulation technique

Standard published on 6.8.2023

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GB/T 4292-2017

Aluminium fluoride

Standard published on 12.7.2017

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