Re: Welding, what do you know?

Posted by Lucky 1 on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Welding-what-do-you-know-tp3416351p3418793.html

Exhausts are made with tubing not pipe. So we call it "exhaust pipe", but it is built with TUBING.

Tubing is measured by the OD and is + or - .002 thousandths.
Pipe is measured by the ID and can be as much as .250 inch  difference on the OD

It is tack welding not tac welding.

All welding joints need to be sanded clean before welding.
A grinding wheel may be too rough for thin exhaust tubing. Try a 80 or 100 grit flap wheel.

The reason to tack weld the exhaust tube in 3 or four spots is to make sure the tube does not get out of round while welding in addition to keeping it aligned.