Amse b16.5 flanges manufactured with plate materials

[victoredc]

Dear all;

I need help with ASME B16.5 Flanges manufacturing.
We have a very hard material requirements imposed by our client. Because of that we cannot achieve these requirements for forging materials.

In this situation we would like to manufacture ASME B16.5 Welding Neck Flanges by machining plates. This is not allowed by ASME B16.5-5.1(paragraph 13); but I want to ask if there is any exception or method (stress calculation; material testing...) that can allow us to use plate for manufacture flanges keeping ASME requirements.

I would be very grateful if someone can help me.

Thanks in advance

Kind regards.