So now i found ANSI B16.5 about threaded flanges
Why should threaded flanges should not be a good idea? It is not the problem to design such threaded connection. I calculated a double testing pressure and a high temperature. i get a force round about 1700 tons. Its a M674 with a lengh of 90mm...
Does anyone know, if the API has a part about screwed flanges? We would like to desing a screwed flange 16" ansi 2500. If there is a part in the api desrcibing such flanges, please let me know where to find? Which chapter?
The german AD2000 has a part about, see attached picture.