| Comparison |
 |
 |
| Maintenance |
No maintenance required, and semipermanent. |
Fluid and electrodes have to be replaced periodically, and high cost. |
| Conditions of Use |
No consumable parts, and constant output always available. |
A constant flame output can be always expected according to the change in the amount of gas generation and torch aging phenomenon. |
| Safety Accidents |
Safe as only the material's temperature is increased and its own temperature is always low. |
High risk of safety accident as a flame is always existing in the workplace. |
| Convenience |
Output can be freely adjusted, and instantaneous heating and halt possible. |
Flame adjustment is difficult, and instantaneous heating and halt not possible. |
| Productivity |
Improvement effect of 1.2~1.5 times |
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| Quality |
Little deformation and discoloration and excellent weldability as low temperature uniform heating is applied. |
Severe discoloration occurs as unidirectional concentrated heating is used. |
