It depends how wide the pipe is, but generally up to 230mm diameter you
could just shutter around it and leave a 50mm space all around (for any
settlement) and then pour the concrete. More than this size pipe, and
do the shuttering , but throw a couple of re-bars or a small rsj/angle
iron into the concrete just above the pipe

For brickwork, just do the same, but with brick and a concrete lintol
with min 100mm bearing past the 50mm gap.

dg