How to cut steampipe, black pipe for a turbo merge collector with simple tools

A friend decided to build a new turbo manifold out of steam pipe, black pipe, nominal bore pipe and asked me to give him a hand with it, our first attempt at cutting the merge collector pipes didn t work very well so I came up with this method. This video is intended for entertainment purposes only The pipes were cut longer than required to allow trimming later, and as square as possible on the end that will locate against the stop. A thick cutting disc was used at first to get a flatter cut but it took