Problems encountered with 16MnR and Q345R during the transition period
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According to the regulations, 16MnR shall not be used in design drawings issued after January 1, 2009; meanwhile, it is stipulated that the 16MnR material can still be used by manufacturing units until August 31, 2009. So, in the drawings designed between January 1, 2009, and August 31, 2009, if Q345R is specified, but the actual manufacturer uses 16MnR instead, and 16MnR cannot be used as a substitute for Q345R, what should be done? Our drawings only specify Q345R, but the manufacturing unit must use 16MnR (its use was also allowed until August 31, 2009). The website of the General Administration of Quality Supervision, Inspection and Quarantine states that 16MnR cannot be used as a substitute for Q345R during manufacturing. How to solve this problem. Contradiction! ! ! This post was last edited by 123ndjxznl on 2009-3-13 15:44]
Personally, I think such a regulation is reasonable, as there is certainly a certain time frame from the selection of materials for design to their actual manufacturing. This regulation is put in place to provide market space for the steel products that have already been manufactured using 16MnR, so that these products can circulate in the market and help to utilize up the stock of 16MnR held by manufacturers. For designs created after January 1st, it is no longer possible to use 16MnR as the designation; instead, Q345R must be used. This ensures that there will be no further demand for 16MnR after January 1st.
Under such circumstances, the manufacturing unit should no longer use 16MnR, as the design unit will not approve its substitution.
You need to explain why it can’t be substituted Under normal circumstances, it can be used as a substitute just fine, unless the owner specifies the use of Q345R; however, I doubt there are many owners who would do that
During this period, manufacturing units using 16MnR do not need to go through any procedures for material substitution.
The website of the General Administration of Quality Supervision, Inspection and Quarantine states that 16MnR cannot be used as a substitute for Q345R during manufacturing
Is there any official evidence available? Thank you!
It should work, as Q345R includes a range of sheet materials; you can take a look at GB730
I don’t know where the file you’re talking about is; I couldn’t find it on the relevant websites
The period from September 1, 2008, to September 1, 2009, was a transition period. Materials whose warranty certificates indicated a production date after September 1, 2008, could no longer use the old standards and old grades; design firms also were not allowed to use those old standards and grades after January 1, 2009. However, during the period from September 1, 2008, to September 1, 2009, equipment manufacturers could still use the old standards and old grades – this is what is meant by a transition period. Using 16MnR before September 1, 2009, did not require any design changes. Take a look at this link: http://bbs.hcbbs.com/thread-411959-1-1.html. This post was last edited by yaoyongyoyo on March 14, 2009, at 11:58
http://interview.aqsiq.gov.cn:8080/was40/search?templet=demo_result.jsp&searchword=%28%28doctitle%3D%27+20090201-2098-54860%25%27+%29+or+%28doccontent%3D%27+20090201-2098-54860%25%27+%29+and+%28CHNLNAME+%3D%27%E7%95%99%E8%A8%80%E5%9B%9E%E5%A4%8D%27%29%29&channelid=40734
If no design changes are to be made, is it acceptable for the material names on the drawings to differ from those of the materials actually used? If not, how can this issue be resolved?
I see; in my opinion, this answer is just showing off. If that’s the case, then what’s the point of having a transition period for design and manufacturing? Which manufacturing plant does not produce according to design drawings? The person who answered seems to be stupid.
You are absolutely right. The key is whose advice should we ordinary people follow.
Personally, I suggest you ignore this completely. As far as I know, 90% of manufacturers are using substitutes.
What if the inspection agency refuses to give approval?
Unless you show him the Q&A you saw. Otherwise they won’t care; they only know about that transition notice.
The problem now is that they showed us that Q&A: lol
Wow, your boiler inspection agency is really arrogant. Then have your boss prepare the money.
The logical relationship is quite clear. The design firm can use the original grade until the end of 2008, allowing it to continue using that same grade for production in 2009 as well. If the drawings produced by the design firm at the end of 2008 use the new grade Q345, then the manufacturing firm must also use Q345R, again in order to promote the use of this new grade of material as quickly as possible.
Isn’t it in a transition period? There’s no need to go through any procedures for substituting documents.