Flanges B16.5 x Flanges ASME VIII Requirements
Flanges B16.5 x Flanges ASME VIII Requirements
(OP)
Hello all
I needed to check the possibility to increase the working pressure of a flange above the pressure-rating given by asme b16.5.
The pressure rating is 15.8 bar. The demand is to work up to 18.6 bar.
In order to verify the possibility I used the ASME VIII code procedures and surprisingly the flange is not acceptable even if I use the b16.5 pressure-rating (15.8 bar) in the calculations.
I checked the calculations many times, and it seems that there is no problem.
Does anybody know if it is possible?
Thanks in advance.
I needed to check the possibility to increase the working pressure of a flange above the pressure-rating given by asme b16.5.
The pressure rating is 15.8 bar. The demand is to work up to 18.6 bar.
In order to verify the possibility I used the ASME VIII code procedures and surprisingly the flange is not acceptable even if I use the b16.5 pressure-rating (15.8 bar) in the calculations.
I checked the calculations many times, and it seems that there is no problem.
Does anybody know if it is possible?
Thanks in advance.





RE: Flanges B16.5 x Flanges ASME VIII Requirements
I was once told that this just falls to industry experience. B16.5 flanges have been proven through decades of experience, whereas ASME VIII-1 Appendix 2 flanges are new every time with potentially no comparable track record (picture a very strange geometry...).
Cheers.
RE: Flanges B16.5 x Flanges ASME VIII Requirements
The strange aspect about this issue is that despite ASME VIII gives requirements to determine a working pressure, and normally it´s lower than b16.5 pressure-rating, the code allows us to project a pressure vessel with b16.5 flanges!!
It really seems to make no sense!! So, it´s better to change the flange class...
RE: Flanges B16.5 x Flanges ASME VIII Requirements