ANSI B16.9 with wall thikness of fittings

I really do need a standard in which wall thikness of the fittings exist. In ANSI 16.9 does not exist. Thank you!

[url]http://en.wikipedia.org/wiki/Nominal_Pipe_Size[/url]
If youre conviced, got get an engineering license, and get ASME B36.10/.19

Thank you for the answer. I have ASME B36.10/.19, but there is the thickness of the pipe, not the thickness of the fitting (e.g. an 90 degree elbow). Should I understand that the thickness of the pipe is the same with the thickness of the fitting?

Yes, see ASME B16.9 2009 para 1.4