You need to weld two pipes together at a 90° angle, but it’s not as simple as it sounds. The junction of two perpendicular pipes is a saddle shape, not a simple flat cut. Previously, Toolmonger covered PipeMaster welding templates which adjusted to any angle intersection angle but were a little spendy. If you don’t need that kind of flexibility, you might be able to use one of TruCut’s Pipe Guides.
TruCut makes their reusable guides from 16 ga steel and gives them an industrial powder coat finish. They sell six different guides:
* Saddle and 90° 2-7/8 pipe guide
* Saddle and 90° 2-3/8 pipe guide
* Saddle and 90° 1-7/8 pipe guide
* 45° and 22.5° 2-7/8 pipe guide
* 45° and 22.5° 2-3/8 pipe guide
* 45° and 22.5° 1-7/8 pipe guide
Only the saddle versions are intended for pipe-to-pipe joining — the 90°, 45°, and 22.5° guides are for joining a pipe to a flat surface. The corporate website lists all the guides at $17, but you can pick one up starting at $11 before shipping if you look around.