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PVC-U

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PVC-U

Unread postAuthor: flamerz14 » Thu Nov 15, 2007 10:36 pm

I used this type of pipe for my combustion.Is it pressure rated or safe to use for pneumatics?

I can't find those SCH or grey coloured pipes.only the fittings :cry:
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Last edited by flamerz14 on Thu Nov 15, 2007 11:02 pm, edited 1 time in total.
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Unread postAuthor: JDP12 » Thu Nov 15, 2007 10:57 pm

A pic would be nice, or more details, I have no idea what you're talking about. Try and find a pic please.
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Unread postAuthor: Killjoy » Fri Nov 16, 2007 12:11 am

I have yet to see a Pressure rated pvc U, and since you say its gray pipe, its a 90% chance its electrical conduit which is not pressure rated.
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Unread postAuthor: psycix » Fri Nov 16, 2007 4:56 am

READ the words on the pipe
Does it give any numbers on pressure? use it
Does it not? dont use it
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Unread postAuthor: TurboSuper » Fri Nov 16, 2007 6:54 am

Well, for a combustion it doesn't have to be pressure rated, although I don't know if PVC-U is stronger/weaker than DWV.

Edit: Isn't Google wonderful?

http://www.ttconservatories.co.uk/PVCu- ... s-uk.shtml
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Unread postAuthor: flamerz14 » Fri Nov 16, 2007 7:12 am

Its not gray. I meant I'm trying to find those gray pressure rated pipes. and wouldnt unplasticized be better? more rigid and no softened.
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Unread postAuthor: Ragnarok » Fri Nov 16, 2007 7:56 am

Killjoy wrote:I have yet to see a Pressure rated pvc U, and since you say its gray pipe, its a 90% chance its electrical conduit which is not pressure rated.

Odd, it's the other way round here in the UK - pressure rated PVC is grey, and conduit is usually white.

However, almost all PVC pipe is made from PVC-U (flexible PVC hoses are an exception). The U stands for unplasticised, meaning it's rigid. PVC with plasticisers in it is like a shopping bag, flimsy and less solid, depending on the percentage of plasticisers.

PVC-U tells you nothing about rating, it's just the proper name that we mean when we say PVC pipe - if you hadn't've used PVC-U, you'd've made a floppy cannon that would be unusable.
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Unread postAuthor: DYI » Fri Nov 16, 2007 4:03 pm

He might be talking about UV-PVC, which is very rare and expensive, and is available pressure rated. It resists damage from UV rays.

U-PVC is, as Ragnarok said, simply the proper name for common PVC pipe.

Any plastic pipe that is pressure rated will have some sort of a rating printed on the side of it. If it does not, it is most likely not pressure rated.
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Last edited by DYI on Fri Nov 16, 2007 9:32 pm, edited 1 time in total.
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Unread postAuthor: nivekatoz » Fri Nov 16, 2007 8:50 pm

Make a gun out of aluminum pipe.sch 80...Sch 80 that will hold a lot of pressure...You can get sch 80 aluminum pipe at Onlinemetals.com...Let you createtivity go wild
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Unread postAuthor: VH_man » Fri Nov 16, 2007 8:58 pm

yeah when the threads give out... thats a fun time....... aluminum is sooo soft its threads strip at very low pressures
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Unread postAuthor: Ragnarok » Fri Nov 16, 2007 9:45 pm

If I see one more post promoting the site "Onlinemetals.com", I am going to rally the forum members to push for no less than ritualised defenestration followed a 1,00 ft drop into a spiky fire pit of doom with frictionless sides and filled with chainsaws; the Blendtec Total Blender; endless replays of "All your base are belong to us", and..... CHUCK NORRIS!!!!!!1111 one one 1!!!

Seriously, are you being sponsored by Online metals?
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Unread postAuthor: Killjoy » Fri Nov 16, 2007 11:21 pm

However, almost all PVC pipe is made from PVC-U


Ah I was confused, I didn't realize that he was talking about pvc material, I thought he was talking about a U shaped pvc fitting, which in America generally can only be found as electrical conduit.
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Unread postAuthor: nivekatoz » Mon Nov 19, 2007 7:11 pm

Pure aluminum is really soft and I can see the threads striping out,but the pipe I was refering to is t6-6061 tempered aircraft aluninum...Its an alloy and is stronger than pure aluminum......
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Unread postAuthor: Spitfire » Sun Nov 25, 2007 10:21 am

Try and get HDPU(High Density PollyUrethane) it is rated at 100kPa
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Unread postAuthor: Ragnarok » Sun Nov 25, 2007 10:56 am

Spitfire wrote:Try and get HDPU(High Density PollyUrethane) it is rated at 100kPa

100kPa is bugger all - It's 1 bar, or 14.5 psi.

I use 2100kPa on a regular basis, and that'll be hiked up to 2.5MPa soon.
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