Ignoramus21198 wrote:

What would be involved in making a device to heat copper pipes to red
hot by means of induction. THis is my friend's project, not mine

What would be involved is you doing your auction / ebay thing to find a
commercial induction heating / soldering unit cheap.

Two issues that may present themselves -

- Induction heaters usually require the item to be heated to be passed
into the middle of the induction coil, which may present a logistical
challenge for the pipes.

- Soldering copper pipes, if that's the intention, doesn't need "red
hot" and indeed "red hot" would be a problem.