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That looks
like a very good price. Does that price include machining it into a circle
or is that for a square piece that you have to machine yourself? Another
question is, are they using left over material or cutting it out of a stock
sheet. That would be important to know since if they are taking it out of
left over material (nothing wrong with that) from another project, they may not
be able to provide that price on a consistent basis.
I didn't see
R-Cast by Reynolds listed on their website, so you might be careful to make sure
they aren't providing you the spec sheet you want to see and then substituting
something else in place of it. R-Cast isn't the only thing you can use;
you just want to make sure the specs of whatever brand name they have as a
supplier meets or exceeds AMSE requirements. You might also ask if it
meets or exceeds MIL-P-5245 specs which means it's already been
pre-shrunk.
In any event,
make sure you pick up a copy of "Handbook of Acrylics" or "ASME PVHO-1" so you
can anneal the ports properly prior to installation. I'd be curious to
know if Ports Plastics could do this step as well. I've submitted their
contact form and hope I can talk to one of their reps sometime next
week.
Another
company is EPLASTICS.COM, but they seem to be less willing to sell anything but
full sheets of acrylic. In the 1.5 inch category, you have to buy a 48x96
inch sheet for $2,062. You could get 36 10inch diameter ports out of
that sheet for a per-port-cost of $57.30. Still not a bad price, but if
you only need one or two...well...the sheet is a bit pricey.
USPLASTICS.COM is another company, and their prices on 1inch stock
are about 15% cheaper than EPLASTICS, but it looks like you have to purchase
full sheets from them as well. They have thicker stock but don't list the
prices for it on their web site.
Jon
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