Electrical pipe heated by heating pipe - against the code?
I have probably said this before but one of the first thing they teach in apprentice school is that there are two things that should be avoided when dealing with electrical circuits. Heat and Water. So how hot is hot?

Conductor ampacity charts use 30C or 86F for conductor size ratings. If your conduit temperature is higher then the resistance of the conductor increases making the conductor hotter, making the resistance higher and on and on. You can check the ambient heat of the conduit with an infra red thermometer. So hopefully the heat was taken into account and the conductors are sized accordingly.

Normal recommendation is minimum 3" of separation from hot pipe to give the heat time to dissipate into the air. If you can't achieve that then you might try a piece of welding blanket or some other type of insulation between the conduit and pipe. Welding blanket is fairly inexpensive and you can buy a small one from someone like Harbor Freight or a welding supplier.

Now everything I wrote here except for the sizing and temperature rating of the conductors (Table 310.15(B)(16) and 310.15(B)(2)(a) is not really code. Most of what you are asking about is training and developing skill. The NEC is more about materials and methods, and their safe and proper electrical installation not compatibility with other disciplines.