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This is a China Industry Standard,

What is China Industry Standards ?

China Industry Standards are often referred to as “China Professional Standards”.
China Industry Standards are generally issued for unified technical requirements within a specific national industry when there are not corresponding China National Standards (GB standards).
China Industry Standards have similar functions to China National Standards (GB standards), but are usually related to a single Industry ministry . China Industry Standards can be either voluntary or compulsory. The law on standardization states that Industry Standards in conflict with National Standards shall be withdrawn. There is no rule however on how to handle conflicting Industry Standards , issued by different standardization bodies.
China Industry Standards shall be administrated by various administrative departments/ministries of the State Council. In each Industry ministry, there is a specific department which is in charge of the Industry standardization for the new standard items register, final draft approval and issuance.
The codes of China Industry Standards and its industry sector administration are shown in the following table:

China Industry Standards System

  Prefix Code Industry Sector Issuing Authorities/Agencies
GB.GB/T,GB/Z China National Standards Standardization Administration of the People’s Republic of China (SAC)
AQ, AQ/T, AQT Safety & Security State Administration of Work Safety
CJ, CJ/T, CJT Urban Construction Ministry of Housing and Urban-Rural Development of PRC
DL, DL/T, DLT Electricity & Power National Energy Administration
FZ, FZ/T, FZT Spinning & Textile Ministry of Industry and Information Technology of PRC
GY, GY/T, GYT Radio, Film & TV State Administration of Press, Publication, Radio, Film and TV of PRC
HG, HG/T, HGT Chemical Industry Ministry of Industry and Information Technology of PRC
HJ, HJ/T, HJT Environmental Protection Ministry of Environmental Protection of PRC
JB, JB/T, JBT Machinery Ministry of Industry and Information Technology of PRC
JC, JC/T, JCT Building Materials Ministry of Industry and Information Technology of PRC
JG, JG/T, JGT Building & Construction Ministry of Housing and Urban-Rural Development of PRC
JJF Metrological Specifications General Administration of Quality Supervision, Inspection and Quarantine of PRC
JJG Metrological Verification General Administration of Quality Supervision, Inspection and Quarantine of PRC
JR, JR/T, JRT Finance The People's Bank of China
JT, JT/T, JTT Highway & Transportation Ministry of Transport of PRC
MT, MT/T, MTT Coal State Administration of Work Safety
NB, NB/T, NBT Energy National Energy Administration
NY, NY/T, NYT Agriculture Ministry of Agriculture of PRC
QB, QB/T, QBT Light Industry Ministry of Industry and Information Technology of PRC
QC, QC/T, QCTT Automobile & Vehicle Ministry of Industry and Information Technology of PRC
SB, SB/T, SBT Commerce Ministry of Commerce of PRC
SH, SH/T, SHT Petrochemical Ministry of Industry and Information Technology of PRC
SJ, SJ/T, SJT Electronics Ministry of Industry and Information Technology of PRC
SL, SL/T, SLT Water Resources (Irrigation) Ministry of Water Resources of PRC
SN, SN/T, SNT Commodity Inspection General Administration of Quality Supervision, Inspection and Quarantine of PRC
SY, SY/T, SYT Oil & Gas National Energy Administration
TB, TB/T, TBT Railway & Train National Railway Administration (previously Ministry of Railway)
  YB, YB/T, YBT Ferrous Metallurgy Ministry of Industry and Information Technology of PRC
YC, YC/T, YCT Tobacco State Tobacco Monopoly Administration
YD, YD/T, YDT Telecommunication Ministry of Industry and Information Technology of PRC
  YS, YS/T, YST Non-ferrous Metallurgy National Development and Reform Commission
YY, YY/T, YYT Medicine & Medical Device China Food and Drug Administration
 
 

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