"Peter Grey" wrote in message
ink.net...

So Harold,

A piece of tubing with the same dimensions, made by the same method, made
from the same material is functionaly the same as a piece of pipe made the
same way? How does one get identified as "pipe" and the other as
"tubing". Is it purely how the two are measured and how their dimensions
are represented? Why would these be labeled differently? Is one commonly
available in one form that the other is not?

Puzzled,

Peter

"Pipe" is just an arbitrary term from blacksmith days. Over time, pipe sizes
were standardized with arbitrary specifications, which are listed in tables
compiled by the industries and government. Even the inside diameter has
little to do with the "nominal" sizes.
"Tube" to most people is anything that looks tubular and is specified in
size by the "outer diameter"