Turning this into a forge?

[Pr3ssure]

So, my neighbor brought home this big cylinder that has got about a 4+ inch hole already in the middle of it. It's about 15 inches long and 12 or so inch inside diameter. The pictures I have are sub-par, but I guess that's what I get for asking my girlfriend to take them and being in a hurry and not looking at them. So I guess just ignore the yard stick. I'm gonna get a few better ones in a bit. 

Anyway, I'm wondering the ideal way if any to go about turning this into a forge. Would the hole that's there be able to be used for a single big burner? Maybe a round ribbon style burner even? Never seen one but that's about the only idea I have. Other than not using that hole for the burner and just making new holes for a 2 burner.

I'm not sure what it was originally, he works for a gas/oil drilling company and they didn't have the paperwork on the piece so they couldn't use it. So he made it dissappear. It's pretty heavy probably half inch or thicker walls all one piece. There is a bar in the middle of the hole but it could easily be cut out. 

To add, I'm mainly just looking for ideas on burners for something like this. 

[ThomasPowers]

Blown burners are not as picky about sizes in my experience so you might be able to build one a bit closer to that.  Of course it's fairly easy to decrease the size of that hole in various ways, (sleeving, casting, stuffing with kaowool,...)

I have a forge made from a gas welding cylinder, (Oxy), and while the heaviness makes it a pain to transport it's great to use as it's stable with stock in it and I welded a small piece of sq tubing on each side that a sq stock "third hand" rides in so I can use it with the back door oven and a long piece in it---one side for the front and one for the back.

To my eye it looks like a great forge body and the 12" allows for 2+ inches of kaowool.

[Irondragon Forge ClayWorks]

Looks like a perfect forge body to me. Like Thomas said overcoming the large burner port is a piece of cake if needed. Our forge has a large port because of the burner design and it likes some secondary air.

[Pr3ssure]

Yeah, I know I could easily make the hole smaller for a regular burner I'm just not sure if one burner would be sufficient enough for it, unless it was a big burner. Which is another thing. Has anyone ever seen a regular burner scaled up that big? Would it have to be forced air at that point? If so would it be best to just get one made for ribbon style for the many little flames apposrd to one big one. 

I was also think that I'd probably use at least 3 1" layers of kaowool since it's so big, I definitely don't need all that space. 

At first I was concerned about how big and heavy it is but I also think it can be an advantage in that it isn't going anywhere unless I want it to. 

[ThomasPowers]

I put mine on a modified propane BBQ cart, (removed the old grill and added a steel plate where it was, installed better wheels and a solid axle, cross bracing for rigidity, etc.) So it's still pretty easy to wheel around.

[Pr3ssure]

That's a good idea. There is an old grill in the garage over there.