6
Installation tape
(available with the heating set)
When the coefficient specified in table 2 has the
value 1, the heating cable should be laid along
the pipe (Fig. 2a). If the coefficient exceeds 1,
the heating cable shall be wound around the
pipe barrel (Fig. 2b).
Example 1
14 m long 20 mm diameter pipe;
- insulation thickness: 10 mm;
- min. ambient temperature : -15°C;
- the pipe is to be fitted with a valve.
The coefficient found in Table 2 for the a.m. parameters is 1, therefore, the
heating cable will be laid along the pipe. Next, ELEKTRA FreezeTec™ 12/15
heating cable 15 m long is selected from Table 1. The cable length exceeds that of
pipe by 1 m. The additional length of 1 m is used for valve heating while the
remaining length of cable is laid along the opposite side of pipe.
The cable may also be wound with small pitch around the pipe so as to use the
whole cable length.
Example 2
12 m long 32 mm DN pipe (outer diameter of the pipe - 42 mm).
- 10 m thick insulation;
- min. ambient temperature: -25°C;
- the pipe has no flanges, valves etc.
The value of coefficient (Table 2) for the a.m. parameters is 1.5. Therefore, the
length of heating cable will be: 1 2 m x 1,5 = 18 m. ELEKTRA FreezeTec™ 12/21
heating cable 21 m long is selected. The cable should be helically wound around
the pipe. The pitch [p] may be calculated using the following formula:
where:
D - outer diameter of pipe
d - dimension of heating cable
L - heating cable length
P
L - pipe length
R
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Summary of Contents for FreezeTec 12/10
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