Pipe is measured as "nominal bore" which means that the size quoted is an
approximate inside diameter. for instance 1/2 NB is about half an inch
inside diameter and the wall thickness is specified either as a "schedule 5
or 20 etc . Tubing is measured as an outside diameter and a wall
thickness. As a general rule tubing has a better finish and more consistent
diameter than pipe.


Tom

"Yvan" wrote in message
news
What is the difference? I have purchased manual for building mini chopper
frame, and I have no idea what to ask for in shop (where I am no one in
metal shop - or any other speaks English). English is not my native
language, so please go easy.


And what is the difference when bending pipe and bending tube. I knew that
bending tools are different, but why? Something to do with a diameter?


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