Technical Data - Southwire PVCHB-13 Instrucciones De Operacion Y Mantenimiento

TECHNICAL DATA

HEATING
A controlled uniform temperature of approximately 250° F
is required to soften PVC Conduit. PVC plastic and other
thermosetting plastic materials may be reheated and reformed,
if necessary, without damage to the materials properties. Using
the procedure outlined below, Schedule 40 and Schedule 80
PVC conduit can be easily formed in the field without crimping,
flattening, or deforming. Forming ducts in the field, (such as
"EB" (Encased Burial)) must be carefully controlled to prevent the
deformation and swelling of the material's very thin wall thickness.
It is recommended that "field bends" be limited to "DB" (Direct
Burial), Schedule 40 conduit or Schedule 80 conduit.
The correct forming temperature can be determined by feeling for
softness on the PVC Conduit through the PVC Heating Blanket
When the PVC conduit feels very flexible it is ready to be removed
and formed. Although ambient air temperature, wind conditions,
surrounding temperature, and temperature of unheated PVC
conduit will have an effect on the heating time, a general estimate
for heating PVC with the PVC Heating Blanket is below:
Model Number
PVCHB-13
PVCHB-13
PVCHB-13
PVCHB-13
PVCHB-13
PVCHB-30
PVCHB-30
PVCHB-30
PVCHB-38
PVCHB-38
12
Size of PVC
Conduit
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
3 1/2"
4"
Estimated Heating
Time for Schedule 40
3.75 minutes
5 minutes
7 minutes
7.5 minutes
8.25 minutes
8 minutes
9 minutes
11 minutes
9 minutes
10 minutes
Estimated Heating
Time for Schedule 80
5.75 minutes
7.5 minutes
7.5 minutes
8.75 minutes
10 minutes
8.5 minutes
11 minutes
12.5 minutes
13 minutes
13 minutes