7" pipe for forge?

T

The Gopher

Joined
Mar 4, 2011
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I currently use a "fire brick" forge and am looking to build something a bit better, not bigger, just better. I came across this 7" pipe that is 14 gauge and just shy of 12" long. Will this be big enough for a hobby knife maker? In other words, what thickness of insulation should I use and would that result in too small a forge with this size pipe? Thanks, Dan.

 
That will make a fine forge. Use 1" Hi-Z Ins-wool.

I will pass on a tip I tell folks often:
Make the ends from 1" thick Ins-board. You just cut it to fit, make the port holes, and cement in place with some satanite. Stack some fire bricks at the front port to make a work shelf.
 
I like to make it just a bit bigger, but that size should work. If you want an IFB solution using that size tube, it's possible. If you've got a welder, hold a piece of ceramic tile against the end and weld just a little tack about every 1/2". When you take the tile away, it will leave a nice tooth. You want the tooth just a little wider than the steel tube, but not much. You can then use this as a handheld hole saw to cut your IFB to match the 7" tube. When you're done, you can just grind off the teeth. Make a jig to hold two bricks together, side by side, and rotate back and forth the holesaw. It should only take a couple minutes per cut. You can get a cheap 4" hole saw for a drill to cut the inner chamber.

This method is how I built the first prototype for the Graham.

[youtube]_MS6Ah1Ljq8[/youtube]
 
That's great, thanks a lot, I just got a stick welder too!

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Is there a website that you guys use for smaller amounts of insulation materials?

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hightemptools.com

They sell all the materials and supplies in small quantities, or in full rolls and buckets. They are the best deal for Ins-board that I have found.
 
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