[TheForge] filling pipe with sand to bend

[Bruce .]

I'm surprised nobody has yet suggested filling the pipe with lead!
Unfortunately, aluminum (less toxic) and other metals probably
wouldn't work as well as lead.  Gold might work.  Send me the pipe and
enough gold to fill it and I'll bend it FOR you!

On Wed, Nov 7, 2012 at 12:17 AM, Peter Fels & Phoebe Palmer
<artgawk at thegrid.net> wrote:
>  Cool Jerry.
> But by gosh, you are talking about really big cable!
> I tried it once with 1 1/2" copper pipe, trying for too small a radius over an inadequate form,
> with just 1" cable...and the result was ugly.
>
> On Nov 6, 2012, at 1:59 PM, Jerry Frost wrote:
>
> It'll work but like anything there are up sides and down sides. Leave a
> little weep hole in the plugs or you can get a steam explosion, even if you
> believe the sand is dry, hygroscopic moisture drives off at temps above
> 230f.
>
> Another method that seems to be really successful is to thread  a cable
> through the pipe and using a winch, hand power or a couple D-9 dozers draw
> the pipe over a mandrel with the desired radius. If you use cable of a close
> match diameter wise distortion will be minimal to not at all. Loggers just
> bend pipe over a tree stump with good results.
>
> Jer
> ----- Original Message -----
> From: "Andy Gladish" <anjgladish at gmail.com>
> To: <theforge at mailman.qth.net>
> Sent: Tuesday, November 06, 2012 6:35 AM
> Subject: [TheForge] filling pipe with sand to bend
>
>
>> Has anyone out there tried this?
>> I've got a curved schedule 10 1 1/4" nominal railing that needs a
>> transition piece between two sections- this will be a curve that changes
>> direction by 15 deg. in about 11". (that's a 42" radius)
>>
>> I'd have to bend it around a form or make some wooden dies and use a
>> press,
>> but if it's hot it seems like it would distort unless the dies are shaped
>> just right.
>>
>> I'm worried about distortion if I roll it cold OR hot....
>>
>> Then after it's done it needs to get to a brushed finish- will muriatic
>> acid do that, or is it better to try to do it cold so there's less
>> cleanup?
>> Or perhaps I can just grind and sand it clean?
>>
>> Thanks for any ideas!
>>
>> --
>> Andy Gladish, Element Fe Metal Studio
>> Blacksmithing and Blades
>> 7141 Guemes Island Road, Anacortes, WA 98221
>> Phone: 360.202.1160
>> Andy at ElementFe.com
>>
>> Visit ElementFe Metal Studio on Facebook! Just search for ElementFe and
>> hit
>> the "like" button. Lots of photos and updates weekly.
>>
>> Talent develops in tranquillity, character in the full current of human
>> life. -Johann Wolfgang von Goethe
>>
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-- 
Bruce
NJ