1/4 inch per foot.
Probably the wrong size flange. Is the flange a toilet collar? If so the pipe is probably 4 inch.
you need to know the viscosity of the liquid - molasses or alcohol?
Wouldn't recommend it as things may back up in the drain line. 4" line is the norm ... you want to get rid of waste, not keep it around longer.
Answering this question leaves a lot of unknowns; 1) Is this in the basement, in the floor, under concrete, or, going to be. 2) Is this on a main level, above a basement (Not a crawl space!). And 10 more questions! There is some planning, but, could be trying to answer 25 different scenario's, as much supplied info. will help. For a short answer to keep it simple, the answer is, yes, you can!
100
30 GPM
1/4 inch per foot.
300 GPM
3 or 4 inch
Un huh performed all the time
Yes, easily.
Depends on the pitch of the waste line?
1/8" per foot
80 gpm
The cable is 3/4 to 1 inch diameter with a head that expands with the rotation. For a 3 inch drain you use a powered auger that turns the cable.
To find the maximum flow you would need to know the maximum pressure. A typical fire nozzle pressure would be up to 100 psi with a diameter of 1 to 1.25 inches. The GPM would be between 300 GPM and 460 GPM through the nozzle. If it were simply a 3-inch pipe with an oversized pump, running at 100 psi with no nozzle, you could (in theory) move over 3,000 GPM through the pipe (ignoring friction loss). Even at 80 psi, a master stream through a 2-inch nozzle moves over 1,000 GPM.