SpudFiles

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

A pic would be nice, or more details, I have no idea what you're talking about. Try and find a pic please.

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.

READ the words on the pipe
Does it give any numbers on pressure? use it
Does it not? dont use it

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

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.

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.

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.

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

yeah when the threads give out... thats a fun time....... aluminum is sooo soft its threads strip at very low pressures

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?

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.

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......

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

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.