1.7.5 Examples
The following examples have been worked out on the basis of stainless steel pipes and a 160 bar system, and the dimension requirements are max.15 bar pressure drop from the machine to the outlet points. 
Example 1 |
|
|
50 m | 40 m | 70 m |
|
| M |
c | b | a |
Two different conditions may be used when dimensioning the pipe system:
A. Based upon a fixed type of spray lance (capacity l/min)
B. Based upon max. capacity, i.e. all spray lances may be used anywhere
A:
If standard lances (17 l/min) are selected for outlet points a, b and c the maximum load on line
According to the diagram the use of a 50 m ∅15 mm pipe will result in a pressure drop of:
In the diagram you follow the 50 m division vertically upwards to the curve symbolizing 17 l/min through an ∅15 mm pipe. From here proceed horizontally and a pressure drop of 2.3 bar is had.
Maximum load on pipe line
Use of 40 m Ø15 mm pipe will result in a pressure drop of:
Maximum load on pipe line
Use of 70 m Ø22 mm pipe will result in a pressure drop of: Total pressure drop
PRESSURE DROP
2.3bar
7.4bar
3.3bar
13.0bar
The aggregate pressure drop on the three lines is less than 15 bar and the dimension requirements have therefore been met.
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