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Re: Black ABS
Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>
At 03:35 PM 4/24/2006, Tesla list wrote:
Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
Not sure if that describes the pipe that I have, it's
schedule 40, rated for pressure, and is hard and solid
all the way through...
OK then, the cellular foam core thing probably isn't an issue.
however, just because it's Schedule 40, doesn't mean it's pressure
rated (Sched 40 just specifies the dimensions)
"ABS pipe is available in solid wall and cellular core construction
in Schedule 40 dimensions. These two forms may be used
interchangeably for DWV applications"
http://www.ppfahome.org/abs/index.html
"ABS, PE and PVC materials are all available with 73 F stress rating
for use in pressure piping. "
http://www.ppfahome.org/pressure.html
It also passes the static electricity test if I rub my
arm agianst it.
I have some carbon black loaded ABS pipe that passes the static
electricity test, but still is a conductor (a poor one). I think it's
because it has an insulating film as the outer layer.
> The problem is not only the carbon black used for
> pigment, but that
> ABS pipe is foam cored. It's actually a foam with
> skins on inside
> and outside. It's DWV (Drain, Waste, Vent) which
> doesn't have to
> hold any significant pressure.
>
> Your problem is that the foam is also a poor
> insulator, being mostly air.