What are the differences between the Ministry of Energy standard NB, the national standard GB, and the Ministry of Machinery standard JB?
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Recently, many standards JB that were originally part of the Ministry of Machinery have been replaced by NB standards from the Ministry of Energy. So what are the differences between GB, NB, and JB standards? Will there be no JB standards anymore? Are GB and NB standards parallel?
NB and JB are industry standards. GB is a **standard, not a level. GB is the foundation; NB and JB should set higher requirements on the basis of adhering to GB.
http://bbs.hcbbs.com/thread-901271-1-1.html There is an introduction there
First, look at the national standards. As for industry standards, whether they are JB or NB, just check the latest version. . .
The standards set by the Department of Energy have replaced those of the Ministry of Machinery. Does that mean the Ministry of Machinery will stop formulating standards going forward?
GB is a **standard**, while NB and JB are industry standards. The Ministry of Industry has been replaced by the Ministry of Energy; as a result, many JB standards have been updated to become NB standards, whereas those JB standards that have not been updated continue to be in use
In summary, GB is a **standard that must be followed**； On this basis, various industries have established higher industry standards based on actual conditions, namely NB and JB. Now, many standards from the Machinery Department have been replaced by those from the Energy Department; therefore, in more industry standards going forward, the prefix will be NB rather than JB. Of course, there are other industry standards as well, such as HG.
Standards can be either mandatory or non-mandatory; not all GB standards are mandatory