COMPARISON
BETWEEN MANNINGS' INDUCTION BOLT HEATING PROCESS
WITH OTHER CONVENTIONAL PROCESS |
|
Mannings Induction
Heater |
Electrical
Coil Heater |
Resistance
Heater
(Cal Rods) |
Gas Heater |
| Designed to heat the
bolt between the threaded area only |
The bolt is heated throughout
its length |
The bolt is heated throughout
its length |
The bolt is heated throughout
its length |
| There is no heating of
thread. It reduces the chance of binding of thread. |
It heats thread making
it prone to binding |
It heats thread making
it prone to binding |
It heats thread making
it prone to binding |
| It takes 3 to 5 minutes
to open each nut |
It takes 30 to 45 minutes
to open each nut |
It takes 20 to 40 minutes
to open each nut |
It takes 15 to 20 minutes
to open each nut |
| Needs only manual force
to open the nuts |
Needs hammering to open
the nuts |
Needs hammering to open the nuts |
Needs hammering to open
the nuts |
| Temperature rises 300o
centigrade maximum inside the bore |
Temperature rises more
than 500o centigrade |
Temperature rises more
than 500o centigrade |
Temperature rises more
than 500o centigrade |
| Cap nut can be touched
by hand immediately after opening |
Cap nut cannot be touched
by hand immediately after opening |
Cap nut cannot be touched
by hand immediately after opening |
Cap nut cannot be touched
by hand immediately after opening |
| No heat transfer to the
parting plane |
Heat gets transferred
to the parting plane |
Heat gets transferred
to the parting plane |
Heat gets transferred
to the parting plane |
| There is no chance of
any emission of any hazardous gas like carbon dioxide
or carbon monoxide |
There is no chance of
any emission of any hazardous gas like carbon dioxide
or carbon monoxide |
There is some emission
of carbon dioxide |
There occurs huge emission
of any hazardous gases like carbon dioxide and carbon
monoxide |
| There is no chance of
backfire |
There is no chance of
backfire |
There is no chance of
backfire |
There is high risk of
backfire |
| Mannings Induction
Heater |
Electrical Coil Heater |
Resistance Heater
(Cal Rods) |
Gas Heater |
