On Jul 14, 10:44*am, Matty F wrote:
I cut up a piece of cast iron to fit the missing lug on this pipe:http://i52.tinypic.com/35aryqe.jpg
That's a one inch hole in the other lug.

The pipe to start with:http://i54.tinypic.com/dhekj7.jpg

Some expert welder will weld the lug on. I suppose he will have to
grind bits off the new piece in order to weld right to the middle.
I'll drill a new hole after the welding is finished.
I've not seen cast iron welded before. Anything to worry about?

Cast is VERY difficult to weld properly. the usual way is to slowly
heat the piece up to red hot, weld it with appropriate rods and cool
it down slowly. Unless you know someone with the right skills its
going to be expensive.
I'd be inclined to try brazing then make a shaped clamp plate to go
over the flange and once complete hide it with paint. Is it an exhaust
pipe from some static engine or something else?