If you have made the bends and such out of steam pipe, then the collector becomes a given - steam pipe! Really at 10mm you won't be making a collector (it will be a heater box) with 4 pipes firing into it.
IMO - you do not weld up the pipes and bends prior to forming the collector. I make the collector priority #1 when making a manifold. Cut the collector pipes out of straight steam pipe at the angle you desire/or is practical for your collector, number them, and then make each one fit into it's own quadrant of the turbo flange. It is a lot of work (which is why I do it first).
Alternatively - use a concentric reducer (available from the same place where you get bends) cut it down to desired size and weld pipes in - I do not recommend this method of manuacture.
Thu, 20 May 2004 08:49
