Thermon TESH - Manual (Page 14)

INSTALLATION GUIDELINES SERIES HEATING CABLES PAGE 12
THERMON...The Heat Tracing Specialists ®
TEP0118U-1111
Installation on valves
FT fixing tape /
SS tie wire
heating cable
NPS
½" 12 150 300 --
¾" 20 220 450 --
1" 25 300 600 300
1½" 40 450 600 450
2" 50 600 750 600
2½" 65 900 750
3" 80 1050 750
4" 100 1500 900
6" 150 2400 1050
8" 200 3300 1200
10" 250 4200 1350
12" 300 5000 1500
14" 350 5900 1650
16" 400 6900 1800
18" 450 8100 1950
20" 500 9000 2100
TYPICAL CABLE ALLOWANCES
PER VALVE *
(single pass) in mm
B
U
T
T
E
R
F
L
Y
N
O
M
I
N
A
L
P
I
P
E
S
I
Z
E
S
C
R
E
W
E
D
F
L
A
N
G
E
D
DN
Note:
- The heating cables should not touch or cross one
another.
- When prescribed in design apply aluminium tape over
the heating cable.
- Min. bending radius of the heating cable is 5-6 x cable
diameter.
- Apply additional SS tie wire/fixing tape in such a way
that heating cable makes close contact with the valve.
* Allowances for valves up to
600 Lbs and a single pass of
heating cable