Questions regarding DN800, 0.6MPa, and the number of bolts in the standard for type A flat welding flanges for equipment?
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I would like to ask an expert: For equipment flanges, according to the standard NB/T 47021-2012 – Type A flat welding flanges, for DN800 and a pressure of 0.6 MPa. The bolt diameter is M20, and there are 24 bolts in total; I think that’s too few – I believe the number should be 28. May I ask if there are any errors in the standards set by the experts?
If you think it’s not enough, you can add more on your own; as long as the bolts are sufficient.
Where did you get the figure of 28 that you mentioned?
Standard flanges selected in accordance with standard requirements are exempt from calculation; most of them would fail the calculation if evaluated using SW6-2011.
I didn’t do any calculations; it’s just a guess: DN800, PN6, bolts M20X24； DN900, PN6, bolt M20X32 ； The difference between the two is huge
I didn’t do any calculations; it’s just a guess: DN800, PN6, bolts M20X24； DN900, PN6, bolt M20X32 ； The difference between the two is huge
You can’t rely on intuition; this watch is not just for your personal use, so there’s definitely no problem with it