## Pressure drop

### Pressure drop

Input Result
Flow q=
Pipe diameter d= mm
Pipe length L= m
Pipe length additions Lt= m
Kinetically viskosity ν= *10-6 m2/s
Density ρ= kg/m3
Material roughness k= mm
Velocity v= m/s
Pressure drop p=

### Pipe length additions

DN25 DN40 DN50 DN80 DN100 DN125 DN200 DN250
Ball valve m/st
st
Soft bend
m/st
st
Normal bend
m/st
st
Bend
(right angle)
m/st
st
T-cross
(bypass flow)
m/st
st
T-cross
(flow angel changed)
m/st
st
Reduction m/st
st
Sum m

### Flow

Air flow in this pipe.

### Pipe diameter

The actual inside diameter of the pipe.

### Kinematic viscosity

Specifies how quickly a liquid spreads relative to its mass if it is poured out on a flat surface. In the original case, set to air at 20˚C.

### Dynamic viscosity

Are proportionality factor for the force it takes to parallel displace a surface relative to another, if the gap between these surfaces is filled with a viscous liquid or gas.

### Density

Density or volume of the mass is an SI unit and is a measure of a specific substance density, ie mass per unit volume. A synonym for density that can sometimes occur is specific gravity.

### Pressure drop

Pipe pressure drop corresponds to the force required to move the medium in the relevant pipe of 1 meter.

### Velocity ​​

The velocity of the air in the tube.

### Pipe length

The length of the tube.

### Pipe length additions

Extensions for bends, valves, etc. in the system converted to meters of pipe.

### Material roughness

A material constant that indicates how smooth pipe material is.

### Formula

Hagen-Poiseuille: Pressure drop calculation for laminar flow. Pressure drop calculation for turbulent flow. Approxomativ solution for Colebrook-White.