Bri-Steel produces their pipes by a process called Thermal Pipe Expansion or “TPE”. This process is performed by using an engineered-size mother tube, heating it to 900deg C by induction heating, and pushing it over a controlled ID mandrel to expand the pipe to a piping size. After that, it is tested and finished to all major industry specifications.
How to make a tube flare, flaring hydrualic tube, Tube flaring, steel tubing flare… www.ttioil.com – TTI Oil, Houston TX. 281 601 4884