Joining pipes at an acute angle

[RichardAllen]

I need to weld a 54mm thin wall mild steel branch pipe (pipe A) onto another 56mm thin wall mild steel straight-through pipe (pipe B), at about 30 degrees to make a Y shaped pipe joint. The joint needs to be a watertight when finished. How do I best shape the end of the branch pipe A and cut the corresponding hole in straight-through pipe B, to get a good fit so that it is nice and neat when welded up ?

Regards

Richard

[Warthog]

Heres a coping calculator and template site: http://www.metalgeek.com/static/cope.pcgi

Hope this helps, have used it several times and makes life easier

Mark

[landmannnn]

My method for a similar thing was to make the joint out of plastic waste pipe a bit smaller than the ID of the metal tube. (a bit bigger so the plastic fits over the steel would have been easier)

With plastic tube a bit of trial and error and it is easy to make the right shape.

Using the plastic as a template I marked the steel and cut to shape using an angle grinder.