It is very common to see pipe supports and pipe shoes connected to an industrial and commercial pipes, for any heat trace application wither its maintain temperature or a freeze protection an extra heat trace cable allowance must be added to the pipe near the pipe support and pipe shoe to compensate for the heat loss, this will apply for any type of the heat trace cables wither its Self regulating heat trace cable or MI heat trace cable. see the picture below from a recent project we supplied and install in Toronto area.
