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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
Standard test methods for sealability of gaskets at elevated temperature for pipe flanges
Standard published on 31.10.2025
Selected format:Satety of woodworking machines—Circular sawing machines with travelling table
Standard published on 31.10.2025
Selected format:Liquid-liquid separators—Test method for energy efficiency
Standard published on 31.10.2025
Selected format:Rolling bearings—Cylindrical thrust roller bearings—Boundary dimensions
Standard published on 12.5.2017
Selected format:Safety valves for cryogenic vessels
Standard published on 31.10.2025
Selected format:Agricultural tractors—Hydraulic pressure for implements
Standard published on 31.10.2025
Selected format:Tools for pressing—Round punches with 60 degree conical head and straight shank
Standard published on 31.10.2025
Selected format:Earth-moving machinery—Evaluation method for operational energy-efficiency of excavator
Standard published on 31.10.2025
Selected format:Tools for pressing—Guide pillar mountings
Standard published on 31.10.2025
Selected format:Plain bearings—Automotive engine bearing test rig using actual connecting rods—Part 1: Test rig
Standard published on 31.10.2025
Selected format:Latest update: 2026-08-26 (Number of items: 2 298 418)
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