# What is the friction factor of a smooth pipe?

## What is the friction factor of a smooth pipe?

During the turbulent region (Re 4000 to 107) f falls proportionally to log Re, but values vary considerably with the roughness of the pipe or duct surface. The range varies from 0.04 at Re 4000 to 0.01 at Re 3 × 106 for smooth pipes, from 0.045 at Re 4000 to 0.03 at Re 3 × 106 for rough (concrete) pipes.

## What is the friction factor for PVC pipe?

Roughness coefficient is based on the material of the pipe. For PVC pipe, the standard C value is 150. New steel pipe uses a C value of 140, but with use and corrosion a lower value is typically used.

**How is pipe Dia calculated?**

The equation for pipe diameter is the square root of 4 times the flow rate divided by pi times velocity. For example, given a flow rate of 1,000 inches per second and a velocity of 40 cubic inches per second, the diameter would be the square root of 1000 times 4 divided by 3.14 times 40 or 5.64 inches.

**How do you use Colebrook formula?**

How to Solve the Colebrook Equation by Hand

- Step 1: Rearrange the Colebrook equation into the form:
- Step 2: Choose a guess value for f.
- Step 3: Solve the right-hand side of the equation.
- Step 4: Check the accuracy of the solution.
- Step 5: Use the new value of f in the right-hand side of the equation and recalculate.

### What is friction factor in pipe flow?

The friction factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against the Reynold’s number. The blue lines plot the friction factor for flow in the wholly turbulent region of the chart, while the straight black line plots the friction factor for flow in the wholly laminar region of the chart.

### What is Q VA?

Q=VA, when flow is constant, as velocity increases, the flow area decreases and vice versa.

**How is the friction factor for flow in a pipe related to the pressure loss how is the pressure loss related to the pumping power requirement for a given mass flow rate?**

How is the pressure loss related to the pumping power requirement for a given mass flow rate? Thus, the friction factor is directly proportional to the pressure loss, for a specified fluid flowing in a particular velocity through a pipe having constant length and diameter.