It's all I had handy....sorry! Single wall pipe would be less than the chart shows so my only opinion is that based on the chart 4" is not large enough for your load.

I found a 1980 NC Mechanical Code Book in the basement and Table 5 Appendix B says that you need a 7" single wall pipe for your total BTU load. You could go with a 6" if you have a 15' high vent or 5" if you have a 30' high vent. This is all single wall pipe.