[modeleng] Re: plastic pipe

CPVC or any other PVC pipe,  or ABS pipe will NOT be suitable for steam. It
will soften, lose strength,  and possibly blow out at anything above 220 F
at over 10 psi.

PC (polycarbonate) and acrylics also not suitable.

Cheers, Jeff Dayman Waterloo Ontario Canada


----- Original Message ----- 
From: "Jesse Livingston" <fernj1@xxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Sunday, April 23, 2006 9:43 PM
Subject: [modeleng] Re: plastic pipe


> Alan,
>
> At the risk of seeming to "Harold" you, I will say that good old Harold
made
> several comments on the use of plastic pipe for use as compressed air
lines.
> He said he had seen plastic pipe burst with only air pressure under
certain
> conditions where the pipe got hot and pressure was probably in the 100psig
> range..
>
> If I were going to try to use plastic as low pressure steam line, I would
> use the pipe called "CPVC' that is intended for domestic hot water
service.
> That ought to work out OK as our son has around 40 PSI of water pressure
> (his house is in a low area and near a tall water tank) and he has not had
> any problems with hot water pipes (145°F) bursting.  275°F might be a
horse
> of a different colour though so proceed with caution.
>
> Jesse in Tennessee
>
>  Does anyone know of any plastic pipe that will withstand low pressure
>  (around 25-30psi) steam.?
>  That is a temperature of around 275F, and I would have thought that may
be
>  within the range of some modern plastics.
>
>  Alan
>
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