Burnham Series 8H/8HE Boiler Manual De Propietario
44
HEAT CONVEYED PER HOUR, MBH, WITH 20°F TEMPERATURE DROP
fRIcTION Vs wATER fLOw - cOPPER PIPE
To use this Figure: (1) Enter horizontal scale at desired flow. (2) Move down vertically to
upper limit of unshaded area, (3) Pick off minimum pipe size on diagonal lines sloping upward
to the right. (4) Pick off water velocity on diagonal lines sloping upward to the left.
fIGURE 3-6
EQUIVALENT LENGTH OF PIPE FOR 90° ELBOWS
To use this table: (1) Enter left hand column at desired water velocity, (2) Move horizontally to
the right to the right to the column headed by the desired pipe size. (3) Read the equivalent
length of pipe for each 90° elbow to be added to the measured length at the piping circuit.
fIGURE 3-7
Vol.
fps
Pipe size
½
¾
1
1¼
1½
2
2½
3
3½
4
5
6
8
10
12
1
1.2
1.7
2.2
3.0
3.5
4.5
5.4
6.7
7.7
8.6
10.5 12.2 15.4 18.7 22.2
2
1.4
1.9
2.5
3.3
3.9
5.1
6.0
7.5
8.6
9.5
11.7 13.7 17.3 20.8 24.8
3
1.5
2.0
2.7
3.6
4.2
5.4
6.4
8.0
9.2
10.2 12.5 14.6 18.4 22.3 26.5
4
1.5
2.1
2.8
3.7
4.4
5.6
6.7
8.3
9.6
10.6 13.1 15.2 19.2 23.2 27.6
5
1.6
2.2
2.9
3.9
4.5
5.9
7.0
8.7
10.0 11.1 13.6 15.8 19.8 24.2 28.8
6
1.7
2.3
3.0
4.0
4.7
6.0
7.2
8.9
10.3 11.4 14.0 16.3 20.5 24.9 29.6
7
1.7
2.3
3.0
4.1
4.8
6.2
7.4
9.1
10.5 11.7 14.3 16.7 21.0 25.5 30.3
8
1.7
2.4
3.1
4.2
4.9
6.3
7.5
9.3
10.8 11.9 14.6 17.1 21.5 26.1 31.0
9
1.8
2.4
3.2
4.3
5.0
6.4
7.7
9.5
11.0 12.2 14.9 17.4 21.9 26.6 31.6
10
1.8
2.5
3.2
4.3
5.1
6.5
7.8
9.7
11.2 12.4 15.2 17.7 22.2 27.0 32.0