Hi All,

I've got a B16.5 Cl900 20" WN flange and a 20" Blind Flange on a vessel.

Design pressure: 137.8 bar
temperature: 120 deg C
material: Gr.1.1 (SA105)
Corrosion allowance: 3mm

To B16.5 pressure rating is 137.96 bar which shows up in the report for the WN Flange, but for the Blind it's 137.796 bar. Which means it's lower than the design pressure

30| 40| 137.800 | 137.967 | 153.060 | 107.950 | No Calc |
40| 50| 137.800 >>> 137.796 | 153.060 | 107.950 | No Calc |

As they are standard flanges I did not perform a calculation.
Does PV Elite take CA. into account? If so how does it do it as there is no calculation?
How can I get around this?

Thanks
Istvan