IndependentBoffin
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Heat bendable glass tubes
When I was much younger my chemistry sets came with glass tubes for connecting into rubber stoppers with holes, etc. that could be melted above a
spirit burner and bent. This allowed you to start with straight tubes and get L, C, Z, etc. shapes.
I can't seem to find these glass tubes anymore, or maybe I am not using the right search term.
Can anyone suggest where I might find them?
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Lambda-Eyde
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"Glass tubing" ?
With a bunsen burner, you can bend borosilicate as well as soda-lime tubing.
This just in: 95,5 % of the world population lives outside the USA
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bob800
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A google/eBay search for "Glass Tubing" as suggested by Lambda-Eyde will give you dozens of sources. For connecting to rubber stoppers, you most
likely want 5mm soda lime tubing (it's easier to melt).
For cutting tubes, you'll want a triangle file to score them. This is also readily available if you do a quick search.
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watson.fawkes
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The term of art used in trade is "flint glass tubing". Google brings up plenty of vendors with this search.
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Sedit
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I could possibly sell some, im getting into glass blowing and working and I am going to pick up some supplies tommorow. I normally get Boro but
Sodalime is an option.
Knowledge is useless to useless people...
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fall of the ruling country, the people who think they can do whatever they want without anybody else's consent. I've seen this story
before."~Maynard James Keenan
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Bot0nist
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I go through a lot of these. If your creative you can rig up some nice DIY rigs with them, and there inexpensive. <a
href="http://unitednuclear.com/index.php?main_page=product_info&cPath=25_26&products_id=301">Glass Tubing.</a>
U.T.F.S.E. and learn the joys of autodidacticism!
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IndependentBoffin
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Quote: Originally posted by bob800  | A google/eBay search for "Glass Tubing" as suggested by Lambda-Eyde will give you dozens of sources. For connecting to rubber stoppers, you most
likely want 5mm soda lime tubing (it's easier to melt).
For cutting tubes, you'll want a triangle file to score them. This is also readily available if you do a quick search. |
Thanks guys I remembered looking on Ebay but noted that all the glass tubing on Ebay comes from one US seller.
Let's hope he stays in business for a long time!
Local UK business suppliers are selling these at rip off prices. E.g. http://www.coleparmer.co.uk/catalog/product_view.asp?sku=347...
8mm OD, 6mm ID, 1890mm long glass tubing £248 + 20% tax. Makes you wonder if it comes in a gold plated box.
Is PTFE tubing an adequate substitute for glass tubing? In the near future I will be distilling acetic anhydride at 140C and also making white fuming
nitric acid.
[Edited on 21-4-2011 by IndependentBoffin]
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bbartlog
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Depending on how much you plan to use you might want to track down a wholesale supplier. I got annoyed with the markup on little bits of tubing
available on ebay and elsewhere, and ordered a box containing 250 pieces of 4' long 6mm OD borosilicate glass (Corning) for a little over a hundred
dollars (but I forget where... would have to run look at the box it shipped in, which I still have).
As to whether it would melt over a spirit burner though, not sure. I use a bunsen burner.
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watson.fawkes
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That's 189 pieces per case and the price is per case. It's still around double what you'd pay for the same thing from a dedicated
glass supplier. Standard lengths are 48 inches in the US and (IIRC) 1500 mm elsewhere.
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symboom
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Can flint glass handle thermal shock better than soda lime glass
I cant find anything on this
If I remember right themal different within borosilicate is 200f
And soda lime is 90f where can I find the properties of this glass
Flint glass compared to soda lime glass
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battoussai114
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| Quote: Originally posted by symboom | Can flint glass handle thermal shock better than soda lime glass
I cant find anything on this
If I remember right themal different within borosilicate is 200f
And soda lime is 90f where can I find the properties of this glass
Flint glass compared to soda lime glass |
This nist paper has the linear coefficient of expansion of some glasses. While I had the biggests brain fart interpreting the table but it still is at
least a piece of info on the material.
[Edited on 1-3-2017 by battoussai114]
Batoussai.
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highpower48
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For a US retailer in small quantities try Home Science Tools
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Dr.Bob
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Flint or soda glass does NOT handle thermal stress well, that is why most labware is borosilicate, as it has a far smaller thermal expansion
coefficient. But for many uses, cheap soda glass is fine, like small pieces of tubing.
If anyone is looking for borosilicate glass tubing, I have a few pieces in several diameters, and could cut them into more easily shipable lengths. I
would only ask about $1 per 4' piece, but I am happy to sell small amounts, as long as I can cut them into smaller pieces, as finding 4' shipping
tubes is a pain.
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