Hep20 Technical Handbook
Hep20 Technical Handbook
Hep20 Technical Handbook
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50.0<br />
28mm<br />
40.0<br />
30.0<br />
20.0<br />
3.0<br />
2.0<br />
1.0<br />
0.8<br />
0.6<br />
0.5<br />
0.4<br />
22mm<br />
0.3<br />
10.0<br />
1.5<br />
0.2<br />
8.0<br />
0.15<br />
6.0<br />
1.0<br />
0.1<br />
5.0<br />
4.0<br />
3.0<br />
0.75<br />
0.5<br />
0.07<br />
0.05<br />
0.04<br />
0.03<br />
15mm<br />
2.0<br />
0.02<br />
1.0<br />
0.8<br />
0.7<br />
0.6<br />
0.25<br />
0.01<br />
Flow<br />
(litres per sec)<br />
10mm<br />
Pipe Size<br />
0.5<br />
0.4<br />
0.3<br />
0.1<br />
Velocity<br />
(metres per sec)<br />
0.2<br />
0.1<br />
Head Loss<br />
(metres per 100 metres)<br />
The dashed line refers to the worked example on page 60<br />
Nomogram 3 Determination of pipe diameter for central heating<br />
63
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