[TowerTalk] Stainless Steel Mast

[Richard (Rick) Karlquist]

Craig Ervin wrote:
> Forgot to click replay to all.
>  
> Ok hopefully this helps vs more confusion. 
> The difference between pipe and tube is simply in the way it is sized
> Pipe and is measured on the inside.   Tube and is measured on the outside.  

Pipe is NOT specified by an inside diameter.  It is specified by
a "trade size" that is APPROXIMATELY the inside diameter and may be
smaller or larger than the actual diameter, depending on the wall 
thickness.  The trade size has a specified outer diameter that the pipe 
must meet.  "2 inch" trade size has an OD of 2 3/8 inch.  It doesn't
fit most tower installations.  "1 1/2 inch" trade size has an OD of
1.9 inch and may sort of work in place of 2 inch tubing depending
on the installation.

Rick N6RK