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Standards GB - Chinese national standards - Page 686
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 16850.1-2022
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Optical amplifier test methods—Part 1: Power and gain parameters for single-channel optical amplifiers
Standard published on 30.12.2022
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GB/T 16850.3-2021
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Optical amplifiers test methods—Part 3 Noise figure parameters for single-channel amplifiers
Standard published on 11.10.2021
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GB/T 16850.4-2006
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Basic specification for optical fibre amplifier test methods - Part 4: Test methods for analogue parameters - Gain slope
Standard published on 5.4.2006
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GB/T 16850.5-2001
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Basic specification for optical fibre amplifier test methods--Part 5:Test methods for reflectance parameters
Standard published on 28.9.2001
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GB/T 16850.6-2001
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Basic specification for optical fibre amplifier test methods--Part 6:Test methods for pump leakage parameters
Standard published on 28.9.2001
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GB/T 16850.7-2001
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Basic specification for optical fibre amplifier test methods--Part 7:Test methods for out-of-band insertion losses
Standard published on 28.9.2001
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GB/T 16855.1-2025
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Safety of machinery—Safety-related parts of control systems—Part 1: General principles for design
Standard published on 29.8.2025
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GB/T 16855.2-2015
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Safety of machinery—Safety-related parts of control systems—Part 2: Validation
Standard published on 10.12.2015
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GB/T 16856-2015
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Safety of machinery—Risk assessment—Practical guidance and examples of methods
Standard published on 10.12.2015
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GB/T 16857.1-2002
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Geometrical product specification(GPS)--Acceptance and reverification tests for coordinate measuring machines--Part 1:Vocabulary
Standard published on 15.7.2002
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