Integral Flange Thickness

I have done a lot of reading on this forum and have found a lot of helpful info that has helped me determine thickness for integral flanges on a pressure vessel. However, I am having trouble with one. I've been checking my calculations against ones previously done by software such as PVElite and other reports that have been delivered to my company. All of my calculations match up except for one. The culprit is a Integral Flange, and when I the stress calculations with an assumed thickness of 2.938" for operating conditions result in: Sh=23746 Sr=4112 St=3684 (Sh+Sr)/2=13929 and (Sh+St)/2=13715. However, the report that was given to me show values of 12478, 3249, 17438, 7863, and 14958 respectively. This report was prepared in 1992, but all of the other examples I have used that were included with this report match up with my data. Here is the info on the flange, can anybody check my math or possibly let me know what I have done wrong?

Flange(inches): ID=54 OD=61.5 g1=1 g0=.938 h=2.375

Gasket(inches): ID=54 OD=58 m=2 y=1600 b0=1

Design pressure 192 psig, joint efficiency=1, max stress in tension 17500, bolt circle=59.25, max bolt stress = 25000, actual bolt area = 32.022.

I believe I have included all necessary info, but will be glad to give more if needed.