Bending PCV


Hi, I am in the process of planning a dust collection system with a cyclone dust collector. I have been reading about the different options for collection piping and feel that PCV 6" is the best. There is a great resource at http://billpentz.com/woodworking/cyclone/index.cfm . Mr. Pentz suggests bending pipe with a commercial heating blanket. Does anyone know where to get one of these or does anyone have experience with alternative methods of pending pcv pipe.
Thanks
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snipped-for-privacy@gmail.com wrote:

Anyone selling Greenlee Products. Not sure if the spelling is right
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I've used a large propane torch, carefully. Tom
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snipped-for-privacy@gmail.com wrote:

One of my clients started out using the Kitchen oven to make PVC fittings and joints. They would then shape it, and then fling the finished product out the window to a family member -- who then doused it in a tub to "freeze" the joint. They are much more sophisticated these days.
So I guess you can use any "gentle" heating method that works. :-)
-- Will R. Jewel Boxes and Wood Art http://woodwork.pmccl.com The power of accurate observation is commonly called cynicism by those who have not got it. George Bernard Shaw
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I saw a pool guy make a sheet metal bonnet for the exhaust pipe on his truck. He would start the truck, put the pipe in the bonnet and rotate it until it was hot enough to bend. The bonnet looked just like one for a drain vent. It had the round ring to fit the outside of his exhaust, and then another piece riveted to one side and curved over and riveted to the other side. Worked like a champ. max

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snipped-for-privacy@gmail.com wrote:

A hot air gun works if you are carefull.
You may need to pack the pipe with sand to prevent it kinking.
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snipped-for-privacy@yahoo.com wrote:

touchy. More volume of pipe and depending on the thickness, but it's worth a try. You might be able to rent a heat blanket from a good rental yard.
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evodawg wrote:

How about that tape-like flexible heating element that you wrap around pipes to keep the from freezing? Plugs into 110V.
-jj
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On 19 Dec 2005 07:53:34 -0800, snipped-for-privacy@gmail.com wrote:

I might do this for a radius of a couple of feet or more, but it's just _awkward_ to get a smooth bend in large diameter pipe. It'll kink first chance it gets - try fastening it down firmly to the best sort of bent-plywood former you can lash up and _stretching_ it round the curve, so that it changes shape by elongation more than by compression and buckling. If I could, or if I needed a small bend, I'd use a commercial moulded elbow and solvent weld it in place.
To heat it I've used an electric hot air gun down the middle of the pipe.
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On 19 Dec 2005 07:53:34 -0800, snipped-for-privacy@gmail.com wrote:

I've never done this with 6", but I've bent a lot of 3/4" and 1"... I use a heat gun, but you have to have something inside the pipe at the bend to keep it from collapsing or kinking...
I use a garden hose for small stuff, not sure what you'd use for big pipe...maybe a sleeve of sand like they use for weight for trucks in snow??
mac
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I had an electrician do some 4" gray pvc for an install at work. He had to go 'round some obstables and used the greenlee heat blanket. It works, but you have to be slow and patient. I can't imagine trying to bend 6" by that method. Buy sweeps (long elbows) intead.
On Mon, 19 Dec 2005 09:37:58 -0800, mac davis

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Back when PVC first came out, the local dealer had a 1/2 55 gal. barrel filled with antifreeze solution that he heated over a wood fire. They dipped pieces of pipe in the hot solution and bent it to whatever shape they wanted. Prolly violates 14 different OSHA and EPA regs. now. Bugs
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conduit They would put it inside of a bus exhaust pipe for heat. He stated you could run the pipe around bends. Virgle
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Most things that work well do.

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I just redid my whole system w/ 6" - looking at that exact page. I tried a few bends using a torch as well as a heat gun. I had no luck at all doing it. I have done some smaller stuff - but I just couldnt get uniform enough heat to do what I needed it to do. I finally gave up and just bought a few 45's - I was able to do what I needed w/ that.

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