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1.  TEMPERATURE DIFFERENTIAL

Determine the temperature differential (DT) to be maintained by 

subtracting the ambient temperature (T

A

) from the fluid tempera

-

ture (T

F

) to be maintained (DT=T

F

-T

A

). Typically, for pipe freeze 

protection applications, the pipe temperature should be main-

tained at 40°F. Pipe temperatures should be maintained at 110°F 

for grease disposal lines and 40°F for fuel lines.

2.  HEAT LOSS

Use Table 1 to look up the heat loss associated with the pipe 

diameter and thickness of insulation. If a rigid insulation such as 

calcium silicate is used, the pipe heat loss should be increased to 

that associated with the next larger size. Insulation should also be 

oversized when using any cable other than the standard self-reg-

ulating TSR, without overjacket. This will compensate for the space 

of the heating cable. As an example, you would use 2-inch pipe 

diameter heat losses for 1

1

/2 inch pipe heating application if rigid 

insulation were used. heat loss figures from Table 1 include a 10% 

safety factor.

3.  ADJUSTMENTS TO HEAT LOSS VALUES

The heat losses in 

Table 1

 are based on glass fiber insulation. If 

other insulations are used, multiply the heat loss value by the cor-

rection factor (shown in 

Table 2

) for your insulation.

Heat losses are based on outdoor applications with 20 mph 

wind. If piping is used indoors, multiply heat loss values by 0.9.

4. DETERMINE CABLE P0WER

Using heat loss determined above, select appropriate cable 

from Performance and Rating Data chart. For heat loss in excess 

of 10 W/ft, use multiple cables. For example, for heat loss of 13 

W/ft, use two 8 W/ft cables. Cable power may exceed heat loss 

by up to 50%.

It is also possible to spiral cable on pipe such that the power ap-

plied to the pipe exactly matches the pipe heat loss. For exam

-

ple, for heat loss of 13 W/ft, a 10 W/ft cable can be spiraled on 

the pipe such that 1.3 feet of cable are wound on every foot of 

pipe, resulting in exactly 13 W/ft being applied to the pipe. 

however, spiraling requires significant extra labor to install and 

significant clearance around the pipe. For this reason, we do 

not recommend spiraling. For further information on spiraling, 

contact Easy Heat.

 Insulation     

IPS

 

1

/

2

 

3

/

4

 

1

 

1

1

/

4

 

1

1

/

2

 

2

1

/

2

 

10 

12

 Thickness  (°F)  Tubing 

3

/

1

 

1

1

/

1

1

/

2

 

1.0" 

10 

 

0.3 

0.4 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

1.1 

1.5 

1.9 

2.4 

2.7

  (25mm)  50 

 

1.7 

1.9 

2.2 

2.5 

2.8 

3.3 

3.8 

4.4 

5.4 

7.5 

9.5 

11.5 

13.5

   

100 

 

3.5 

3.9 

4.5 

5.3 

5.8 

6.8 

7.9 

9.2 

11.3 

15.7 

19.8 

24.5 

28.2

   

150 

 

5.4 

6.2 

7.1 

8.3 

9.1 

10.7 

12.4 

14.4 

17.5 

24.6 

31.0 

37.8 

44.2

   

200 

 

7.5 

8.6 

9.9 

11.5 

12.6 

14.9 

17.2 

20.0 

24.5 

34.2 

43.2 

52.6 

61.5

   

250 

 

9.8 

11.2 

12.8 

15.0 

16.5 

19.4 

22.4 

26.0 

31.9 

44.6 

56.1 

68.4 

80.0

  1.5" 

10 

 

0.3 

0.3 

0.4 

0.4 

0.4 

0.5 

0.6 

0.7 

0.8 

1.1 

1.4 

1.6 

1.9

  (38mm)  50 

 

1.3 

1.5 

1.7 

1.9 

2.1 

2.5 

2.8 

3.2 

3l9 

5.3 

6.7 

8.1 

9.4

   

100 

 

2.8 

3.1 

3.5 

4.1 

4.4 

5.1 

5.9 

6.8 

8.2 

11.2 

14.0 

16.9 

19.7

   

150 

 

4.4 

4.9 

5.5 

6.4 

6.9 

8.1 

9.2 

10.6 

12.8 

17.6 

21.9 

26.5 

30.8

   

200 

 

6.1 

6.8 

7.7 

8.9 

9.7 

11.2 

12.8 

14.7 

17.8 

24.4 

30.5 

36.9 

42.9

   

250 

 

7.9 

8.9 

10.0 

11.6 

12.6 

14.6 

16.7 

19.2 

23.2 

31.8 

39.6 

48.0 

55.8

  2.0" 

10 

 

0.2 

0.3 

0.3 

0.4 

0.4 

0.4 

0.65 

0.5 

0.6 

0.9 

1.1 

1.3 

1.5

  (50mm)  50 

 

1.2 

1.3 

1.4 

1.6 

1.7 

2.0 

2.3 

2.6 

3.1 

4.2 

5.2 

6.3 

7.3

   

100 

 

2.4 

2.7 

3.0 

3.4 

3.7 

4.3 

4.8 

5.5 

6.6 

8.9 

11.0 

13.2 

15.3

   

150 

 

5.4 

6.2 

7.1 

8.3 

9.1 

10.7 

12.4 

14.4 

17.5 

24.6 

31.0 

37.8 

44.2

   

200 

 

5.3 

5.9 

6.6 

7.5 

8.1 

9.3 

10.5 

12.0 

14.4 

19.4 

24.0 

28.8 

33.4

   

250 

 

6.9 

7.7 

8.6 

9.8 

10.67 

12.1 

13.7 

15.6 

18.7 

25.3 

31.2 

37.5 

43.5

 

  2.5" 

10 

 

0.2 

0.2 

0.3 

0.3 

0.3 

0.4 

0.4 

0.5 

0.5 

0.7 

0.9 

1.1 

1.2

  (63mm)  50 

 

1.0 

1.2 

1.3 

1.4 

1.6 

1.8 

2.0 

2.3 

2.7 

3.6 

4.4 

5.2 

6.0

   

100 

 

2.2 

2.4 

2.7 

3.0 

3.3 

3.7 

4.2 

4.7 

5.6 

7.5 

9.2 

11.0 

12.7

   

150 

 

3.4 

3.8 

4.2 

4.8 

5.1 

5.8 

6.6 

7.4 

8.8 

11.7 

14.4 

17.2 

19.9

   

200 

 

4.8 

5.3 

5.9 

6.6 

7.1 

9.1 

9.1 

10.3 

12.3 

16.3 

20.0 

24.0 

27.6

   

250 

 

6.2 

6.9 

7.6 

8.6 

9.3 

10.6 

11.9 

13.5 

16.0 

21.3 

26.1 

31.2 

36.0

  3.0" 

10 

 

0.2 

0.2 

0.3 

0.3 

0.3 

0.3 

0.4 

0.4 

0.5 

0.6 

0.8 

0.9 

1.1

  (75mm)  50 

 

1.0 

1.1 

1.2 

1.3 

1.4 

1.6 

1.8 

2.0 

2.4 

3.1 

3.8 

4.5 

5.2

   

100 

 

2.0 

2.2 

2.5 

2.8 

3.0 

3.4 

3.7 

4.2 

5.0 

6.5 

8.0 

9.5 

10.9

   

150 

 

3.2 

3.5 

3.9 

4.3 

4.6 

5.3 

5.9 

6.6 

7.8 

10.3 

12.5 

14.9 

17.1

   

200 

 

4.4 

4.9 

5.4 

6.0 

6.5 

6.7 

8.2 

9.2 

10.8 

14.3 

17.4 

20.7 

23.8

   

250 

 

5.8 

6.3 

7.0 

7.8 

8.4 

9.5 

10.6 

12.0 

14.1 

18.6 

22.6 

26.9 

30.9

Table 1 – Pipe Heat Loss, W/FT

contact easy heat for larger sizes.

©2009 Easy Heat  

www.easyheat.com

 

Summary of Contents for Easy Heat TSR Series

Page 1: ...T TPE OUTER JACKET Polyolefin OVER JACKET TPE INNER JACKET IRRADIATED SELF REGULATING HEATING CORE MATERIAL 16 AWG Tinned Copper Note All above cables are also available with fluoropolymer over jacket for enhanced chemical resistance change suffix J to F Lengths good for 208 277 VAC Performance and Rating Data Power Rating Catalog Service Watts ft Maximum Number Voltage 50o F 10o C Single Run Leng...

Page 2: ...M 220 67M 325 99M 440 134M 50 F 10 C 230 70M 305 93M 460 140M 610 186M Design Procedure The following procedure can be used to select a heating cable system for your application However Easy Heat can also pro vide design assistance and will recommend appropriate cable controls and accessories Call Easy Heat for further information To determine the heat loss that must be replaced by the heating cab...

Page 3: ...to install and significant clearance around the pipe For this reason we do not recommend spiraling For further information on spiraling contact Easy Heat Insulation T IPS 1 2 3 4 1 11 4 11 2 2 21 2 3 4 5 8 10 12 Thickness F Tubing 3 4 1 11 4 11 2 2 1 0 10 0 3 0 4 0 4 0 5 0 6 0 7 0 8 0 9 1 1 1 5 1 9 2 4 2 7 25mm 50 1 7 1 9 2 2 2 5 2 8 3 3 3 8 4 4 5 4 7 5 9 5 11 5 13 5 100 3 5 3 9 4 5 5 3 5 8 6 8 7 ...

Page 4: ...valves 1 Calculate temperature differential T TF TA T 50 10 F T 60 F 2 heat loss Use Table 1 to find heat loss Where the desired temperature dif ferential falls between two values use interpolation From Table 1 50 F Q 4 4 w ft 100 F Q 9 2 w ft QF 4 4 w ft 10 50 9 2 4 4 w ft QF 4 4 96 5 4 w ft 3 adjustment to heat loss Adjust the heat loss for mineral fiber From Table 2 the adjusment factor is 1 2 ...

Page 5: ...rapid heat up be required extra heat must be added This is often accomplished by using extra heaters that are turned on only in heat up situations Contact Easy Heat for further information 4 hazardous area design criteria Heaters installed in hazardous explosion hazard areas must have sheath temperatures that do not exceed the ignition temperature of the hazardous gas or dust that is present The m...

Page 6: ... cable conforming to the specifications set forth in our installation instructions and b the accessory or cable not having been damaged by mechanical or electrical activities unrelated to the operation of the accessory or cable A refund of your purchase price provision of replacement products repair of the accessory or cable or provision of corrected services as described above shall be your sole ...

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