For laminar flow? For a full pipe? for a 3/4-full pipe? For a 1/2-full pipe? It all makes quite a difference. Please repost your question with a little more information.
It would also help to for us to know the coefficient of friction of the inside of the pipe.
2.5 gallons per minute
That depends entirely on the viscosity of the liquid in the pipe ! Water would flow faster than oil !
Depends on what's flowing (gas or water or something else) and under how much pressure.
that's what she said
Given enough time the entire ocean could be pumped through a half-inch pipe.
10gpm
question cannot be answered because it depends on the water pressure
2.5 gallons per minute
300 gallons per minute
Water flow rate half inch PVC pipe 65 psi?
That depends entirely on the viscosity of the liquid in the pipe ! Water would flow faster than oil !
Depends on what's flowing (gas or water or something else) and under how much pressure.
The maximum flow rate through a 1.5 inch pipe is typically around 9 gallons per minute.
As many as could flow through before eroding the piping to the point of no more flowing through and it simply spewing about.
100
If the flow velocity remains the same the flow volume will increase by the square of the diameter ratio.(2/1.25) = 1.6 = diameter ratio1.62 = 2.56 more flow volume through 2 inch pipe compared to 1.25 inch pipe.
The recommended diameter for a 2-inch drainage pipe to effectively manage water flow is typically around 4 inches.