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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
Plastic - Poly(vinyl alcohol)(PVAL)materials - Part 2: Determination of properties
Standard published on 2.9.2010
Selected format:Plastic - Poly(vinyl alcohol)(PVAL)materials - Part 3: Specification
Standard published on 2.9.2010
Selected format:Plastic - Poly(vinyl alcohol)(PVAL) materials - Part 4: Determination for pH value
Standard published on 2.9.2010
Selected format:Plastic - polyvinyl alcohol (PVAL) materials - Part 5: Determination for average polymerization degree
Standard published on 2.9.2010
Selected format:Plastic—Poly (vinyl alcohol) (PVAL)materials—Part 5:Determination for average polymerization degree
Standard published on 2.9.2010
Selected format:Plastic - polyvinyl alcoholPVALmaterials - Part 6: Determination for particle size
Standard published on 2.9.2010
Selected format:Plastic—Poly(vinyl alcohol)(PVAL)materials—Part 6:Determination for particle size
Standard published on 2.9.2010
Selected format:Plastics - polyvinyl alcohol PVALmaterials - Part 7: Determination for sodium hydroxide contents
Standard published on 2.9.2010
Selected format:Plastic - polyvinyl alcoholPVALmaterials - Part 8: Determination for transparency
Standard published on 2.9.2010
Selected format:Plastic—Poly (vinyl alcohol)(PVAL) materials—Part 8:Determination for transparency
Standard published on 2.9.2010
Selected format:Latest update: 2026-08-28 (Number of items: 2 298 625)
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