Help: How to cut 16-24 inch pipe squarely

Two roller conveyor sections , two rollers each - rollers not necessarily right next to each other . One section at each end of the pipe , and a mount of some type for the torch on one of them . I've been planning on grabbing a couple of extra rollers from work to make a roller cradle to cut the ends out of an empty freon bottle for my mini-forge . For my use , a couple of boards would work to hold the ends .

Rent a pipe cutting outfit for torching and beveling pipe. On large pipe there is a chain affair that wraps around the pipe and a bug carrying the torch travels around cutting or beveling the pipe. Large pipe is not round so rotating the pipe is ok but you are constantly adjusting the torch as the pipe rotates. Randy

I'll bet a piece of Formica or whaterver they call countertop laminate material these days, if wrapped around your pipe would make a nice square line. Same idea as your flashing, but it is wider and may resist bending "the hard way" better. Good luck, Andy

They make devices to do just this. A clamp which fits around the pipe and a traveler (for want of a better word) that rides on the clamp and holds the cutting torch. I've seen them both hand cranked and motor driven. Very common in the pipeline business.

Bruce in Bangkok (brucepaigeatgmaildotcom)

Try here (but don't look at the price tag).

Another suggestion for you. We mounted an old four jaw chuck on a small three phase gear motor and VFD to drive it. It can go from about one turn in

The turner is great for accurate torching, grinding, and welding.

Karl

Details on miniforge please.

Wes

Thank you all for your suggestions and help. I'm going to try the countertop material (Formica or whatever they're using these days" first and until I can build a turning bed. We'll see how that works. I am going to try to get sections in the right length to wrap around the various sized pipes I use; that is, one length for a 16 inch pipe, another for a 24 inch pipe, et cetera.

Thank you all again.

--HC

Google "Ron Reil" - he also has some stuff on abana's pages , or did at one time . Basically it's a 30 lb freon bottle with both ends cut out , and piece of (dammit , can't recall what it's called) material on standoff's , flat and fitted as a bottom plate . The rest of the walls are insulated with kaowool , coated with ITC100 or a similar product . There's a ton of links out there no nini forges . Here's one - ronreil.abana.org/minifor1.shtml

As I recall, cast iron pipe installers use a Chain cutter. It wraps around the chain and there are cutters in the chain that score - like a copper pipe cutter. It would mark it nicely. Otherwise you need to think wide wheel and a set of them that are banded together in a hoop. as it rolls it won't skate sideways as it would be out of align and re-corrects.

But a long chain cutter might be the way!

For marking - you could use a sheet of heavy paper - or sheet metal that wraps around and match the side on the far side as it overlaps. The wide sheet can't align but one way. Scribe a line. Martin

Mart> Hey, all, I have been doing some work involving 16-24 inch diameter