"Jim Wilkins" wrote in message
...

"Steve B" wrote in message
...
I need to do some math on some pipe sizes. I may need as many as two
pipes within one, perhaps 3. The center one could be SS, or copper, as it
would have no abrasion on it.

Is there a chart where I would compare a bunch of pipe sizes to pick out
the ones I think may work together? I know there are slight variations
in sizes for all reasons, and will probably have to go to several
sources. It needs to be good steel pipe, corrosion and wear resistant
grades.

Steve

According to the CAD drawing I made for my own quick reference, 1-1/2"
pipe slides easily into 2" and 1" fits in 1-1/4" if the welding flash
isn't too thick. The OD of 3/4" and the ID of 1" are almost identical and
in my experience don't fit without lathe work. All other adjacent sizes
from 1/8" to 2" don't telescope. Pipes that differ by two sizes all do.

Proly would have more combinations by mixing schedules.... altho good luck
in procuring anything other than sched. 40, and good luck in affordability.
http://en.wikipedia.org/wiki/Nominal_Pipe_Size seems perty comprehensive.

Aluminum (threaded) electrical tubing/piping could be another option. Std
plumbing threads, but mebbe diff (and certainly smoother) IDs. Nice stuff,
readily available.

--
EA



The 1:1 drawing of a cross-section of stacked pipe rings shows only
Schedule 40 iron waterpipe from the BigBox stores.

The drawing was done in the 'PADS' PC board design program which doesn't
seem to export properly to other platforms. The free demo version allows
only 30 electrical components, but unlimited line items.

jsw