HD110301-1 Rev2
Page 16 of 23
The following Table 2 shows the amount of extra cable required to heat trace pipe hardware such
as valves and supports.
Allow an extra 4 feet of cable per cable circuit run for the power and end seal terminations.
Example: 3 feet for the power termination and 1 foot for the end termination.
Table 2
HEAT LOSS ADDERS (CABLE PER FOOT)
Pipe Hardware Types
Pipe Size
Inches
Flange
Per Pair
Vent
Drain
Pipe
Support
Globe, Ball
& Butterfly
Gate
Valve
½
0.3
1
1
1
1
¾
0.3
1
1.5
1
1.5
1
0.3
1
1.5
1
2
1 ¼
0.3
1
2
1.5
2.5
1 ½
0.3
1
2
1.5
2.5
2
0.3
1
2
2
2.5
2 ½
0.3
1
2
2.5
3
3
0.3
1
2
2.5
3
4
0.5
1
2.5
3
4
6
0.8
1
2.5
3.5
5
8
0.8
1
2.5
4
7
10
0.8
1
3
4.5
8
12
0.8
1
3
5
9
14
1
1
3
5.5
10
16
1
1
3.5
6
11
18
1
1
3.5
7
12
20
1
1
3.5
7.5
13
24
1
1
4
8
15
