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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
Industrial circulating cooling water Determination of silica—Spectrophotometric method
WITHDRAWN published on 2.12.1996
Selected format:Industrial circulating cooling water—Determination of zinc for phosphor-zinc prefilming fluid—Atomic absorption spectrometric method
WITHDRAWN published on 2.12.1996
Selected format:Industrial circulating cooling water—Determination of calcium for phosphorus-zinc prefilming fluid—Atomic absorption spectrometric method
WITHDRAWN published on 2.12.1996
Selected format:Technical regulations for diver""s safe use of electricity under water
WITHDRAWN published on 4.12.1996
Selected format:General specification for lightweight gas turbine electrical equipment
WITHDRAWN published on 13.12.1996
Selected format:Aerodynamics—Concepts, quantities and symbols Part 1 Aerodynamic terms in common use
WITHDRAWN published on 13.12.1996
Selected format:Aerodynamics—Concepts, quantities and symbols Part 2 Axis systems and aircraft motion state quantities
WITHDRAWN published on 13.12.1996
Selected format:Aerodynamics—Concepts, quantities and symbols Part 3 Aircraft geometry
WITHDRAWN published on 13.12.1996
Selected format:Aerodynamics—Concepts, quantities and symbols Part 4 Aerodynamic forces, moments, their coefficients and derivatives of aircraft
WITHDRAWN published on 13.12.1996
Selected format:Alanine—EPR dosimetry system for radiation processing
WITHDRAWN published on 13.12.1996
Selected format:Latest update: 2025-09-16 (Number of items: 2 234 278)
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