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Author Topic: Source of glass pipe?  (Read 8180 times)

Nick1911

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Source of glass pipe?
« on: July 31, 2008, 11:22:14 AM »
Looking for a cheap, available source for glass pipe, approximately 1 inch in diameter and at least several feet long.  Borosilicate glass would be ideal.

One thought on this (Which I know everyone is going to freak out at...) is to cut florescent tubes at each end, and use a solvent on the phosphor layer.  It seems like a bad idea because of the mercury issue, although sources indicate that about 99% of the mercury is bonded with the phosphor layer.  I'm also not sure what type of glass a florescent tube is, exactly.

A commercial source would be nice, but I haven't found anything that would cost a solid $100 for a 3-4 foot chunk.

Thoughts?

Edit:  On a side note; finding "glass pipe" for sale on the internet tends to lead to online head shops.  cheesy
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K Frame

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Re: Source of glass pipe?
« Reply #1 on: July 31, 2008, 11:25:22 AM »
Try googling this phrase

"laboratory supply glass tube" (or tubing)
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Balog

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Re: Source of glass pipe?
« Reply #2 on: July 31, 2008, 11:25:43 AM »
Try googling "glass tube" instead of pipe.

http://www.us.schott.com/tubing/english/index.html

http://www.bd.com/accu-glass/

I see Mike beat me to it.
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never_retreat

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Re: Source of glass pipe?
« Reply #3 on: July 31, 2008, 11:27:29 AM »
So what kind of crack pipe are you building? I guessing its going to be a high end product with the use of Borosilicate glass.
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Nick1911

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Re: Source of glass pipe?
« Reply #4 on: July 31, 2008, 11:28:35 AM »
Quote from: Mike Irwin on July 31, 2008, 10:25:22 AM
Try googling this phrase

"laboratory supply glass tube" (or tubing)

I will try that again.  Everything I found in that market was either under 12 mm, or really, really expensive. (like $200 per 4 ft.)
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Nick1911

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Re: Source of glass pipe?
« Reply #5 on: July 31, 2008, 11:30:01 AM »
Quote from: never_retreat on July 31, 2008, 10:27:29 AM
So what kind of crack pipe are you building? I guessing its going to be a high end product with the use of Borosilicate glass.

LOL.  It's actually for some solar energy experiments.  I'm working on a design for residential solar-powered HVAC.  The pipe is needed for a prototype.
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K Frame

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Re: Source of glass pipe?
« Reply #6 on: July 31, 2008, 11:31:20 AM »
Another possible option would be an industrial boiler supply company.
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Headless Thompson Gunner

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Re: Source of glass pipe?
« Reply #7 on: July 31, 2008, 11:34:30 AM »
Why glass?  Why not copper or somesuch?
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Re: Source of glass pipe?
« Reply #8 on: July 31, 2008, 11:35:40 AM »
Quote from: Headless Thompson Gunner on July 31, 2008, 10:34:30 AM
Why glass?  Why not copper or somesuch?

Black plastic water pipe?

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Nick1911

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Re: Source of glass pipe?
« Reply #9 on: July 31, 2008, 11:37:54 AM »
Quote from: Headless Thompson Gunner on July 31, 2008, 10:34:30 AM
Why glass?  Why not copper or somesuch?

There will be a copper, or more likely aluminum heat pipe inside the glass pipe.  The space between them will be evacuated to serve as thermal insulation.  The higher temperature requirements of my chiller necessitate the extra design complexity.
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Re: Source of glass pipe?
« Reply #10 on: July 31, 2008, 12:01:30 PM »
I'm incredibly interested in how this turns out for you Nick. I'm planning for my own home purchase in a year or two (God willing) and it sounds as tho we have a lot of similar aspirations about DIY. Please keep us posted about Casa de Nick's progress.
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Re: Source of glass pipe?
« Reply #11 on: July 31, 2008, 01:03:08 PM »
Quote from: Mike Irwin on July 31, 2008, 10:25:22 AM
Try googling this phrase

"laboratory supply glass tube" (or tubing)

....just don't do it in Texas without the proper license....  police
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Re: Source of glass pipe?
« Reply #12 on: July 31, 2008, 01:37:53 PM »
Quote
LOL.  It's actually for some solar energy experiments.  I'm working on a design for residential solar-powered HVAC.

Whoa. This dude is TOTALLY baked! Cheesy
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Re: Source of glass pipe?
« Reply #13 on: July 31, 2008, 02:22:34 PM »
Nick (aka Dr. Horrible),

Ya know that Captain Hammer reads APS.........

 grin laugh
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Re: Source of glass pipe?
« Reply #14 on: July 31, 2008, 04:24:37 PM »
yea, you're going to want a bit thicker wall than what a flourescent light tube is going to provide. Do you HAVE to make it vacuum tubes? I'm thinking if you could lose the vacuum part you might get away with the plastic scatter shields they make for the flourescent tubes, just a thought.
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Sergeant Bob

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Re: Source of glass pipe?
« Reply #15 on: July 31, 2008, 04:48:57 PM »
I don't know if it would suit your temperature requirements but, you might take a look at the glass tubing used for dairy milking operations.
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Re: Source of glass pipe?
« Reply #16 on: August 01, 2008, 02:50:06 AM »
Oops, missed the higher temps necessity thing.

Look here:

http://www.viessmann-us.com/en/products/Solar-Systeme/Vitosol_300.html

The 20 tube array was quoted to me at $8000 HOWEVER you can buy the tubes individually, they are self contained. Don't know for how much though. Probably not too much more than buying the parts and fabricating them yourself.

Are you using ammonia in your chiller?
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HankB

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Re: Source of glass pipe?
« Reply #17 on: August 01, 2008, 03:47:48 AM »
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Re: Source of glass pipe?
« Reply #18 on: August 01, 2008, 04:42:17 AM »
I wouldn't use fluorescent tube glass for this, it always seemed way too fragile.  Go with laboratory grade stuff, or just use insulation since it is a prototype.  Personally I think fiberglass insulation with a heat shrink plastic cover would work, and be ALOT cheaper.  Laboratory glassware is not cheap.
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Nick1911

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Re: Source of glass pipe?
« Reply #19 on: August 01, 2008, 04:47:33 AM »
Thanks for all the suggestions guys; now I have some sources I can start pricing.

Quote
Are you using ammonia in your chiller?

Yes, and it's making component and seal material choices difficult!  Apparently ammonia + water gets past the oxide layer and eats aluminum parts.  undecided
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K Frame

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Re: Source of glass pipe?
« Reply #20 on: August 01, 2008, 05:05:07 AM »
You've just rediscovered one of the reasons why ammonia isn't used in that much in refrigeration equipment anymore.

That and the overt toxcicity.

I'd suggest a small fan in your basement laboratory.  laugh
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Re: Source of glass pipe?
« Reply #21 on: August 01, 2008, 05:08:02 AM »
He's really building frickin' lasers to take over the frickin' world.






Want some help?
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Re: Source of glass pipe?
« Reply #22 on: August 01, 2008, 05:47:17 AM »
If he asks for a source for lab grade sharks we'll know we're in trouble.
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Quote from: Standing Wolf
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Re: Source of glass pipe?
« Reply #23 on: August 01, 2008, 08:16:17 AM »
That's why they use cold rolled steel and stainless steel in them. They use uh, zinc chromate in the water solution to inhibit the steel being corroded by the water. Aluminum will not work. Nor will copper, brass etc.

One thing about ammonia, there's never any doubt as to whether there's a leak or not.  cheesy




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K Frame

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Re: Source of glass pipe?
« Reply #24 on: August 01, 2008, 08:26:09 AM »
Oh well, he can always try sulphur dixoide...
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