Large sheet metal roll?

[ChadInColo]

As part of my project I have a large (16.2 foot length) sheet metal (t=2.5 mm) tube I need rolled to an 895 mm diameter. Surely there is capability out there to do this (it is currently being done overseas) in the United States, but I have drawn a blank everywhere I have looked. There are plent of 20 foot plate rolls, but all for 1 inch plus material. The crown on those rolls won't allow an acceptable product, diameter tolerance of +- 2mm.

I don't know if this is where I should post this, but anybody have any ideas? I have tried all the sheet fabricators I have around here (northern Colorado), they all tell me the same thing, they don't know of anyone who would have this capability. I've thought of a spiral tube mill, it's outside that capacity. Only other choice is 2 9 foot sections with a splice, which I hate to do, and don't know if I can hit tolerance requirements. I would appreciate anyone's help. Thanks.

 

[griffengm]

Chad,
You might try contacting some of the roll manufacturers to find to whom they may have supplied a specialty roll. They are not usually shy about sharing this type infomation.

 

[ChadInColo]

Would you happen to have any contact info? I have talked to several large equipment suppliers, nobody can remember selling a roll such as this. I haven't talked to the manufactures themselves though, would almost have to hit the one salesman that sold one. Thanks for the idea though.

 

[griffengm]

Three from a recent project: Heller, Comeq Roundo, Carrel Eagle. I believe Webb is still around also. Most of these folks have built or will build customized machines. The project I worked on required customization.
If not these guys then try a search of Thomas Register.