Post Weld Heat Treatment

This sounds like a test question. We don't do homework here.

Do some research on your own. Then tell us what you think the answer might be.

The difference between inductive and resistive heating is the way that electrical energy is converted to heat.

Once you understand this difference you will know where each technique may be more applicable.

One technique will have an advantage over the other by virtue of its applicability and vice versa.

I hope this helps.

To get you started, inductive heating looks like this sometimes.

Inductance heating is done by 60 -cycle transformers or laminated core inside a pipe or on the surface of plate adjacent to a joint.They could be automated if required.The coils may be heavy flexible copper cable with asbestos, buss bars or water cooled coils.

Electric Resistance method uses 80/20 nickel-chromium wire and insulated beads method. These heating elements wrapped around a pipe and connected to a welding transformer

Presently used with alumina ceramics of high mechanical yield strength, do not break easily while handling. can be used up to 1050⁰ C and good electrical insulation and heat conducting properties.

Not suitable for vertical and larger size vessels and cumbersome.

Special modular flexible ceramic heaters are available with wide applications for the piping field now a days.

Inductance heating is not energised at 50-60Hz mains frequencies.

Try 5kHz to 500kHz range.

There's another difference for the OP.