Tube Links
Here are some great tube and pipe sites presented in no particular order .
Recycle Consultants
"A service of Welded Tube Pros"
The International Tube Association
Tube and Pipe Association, International 
Fabricators & Manufacturers Association 
Tube Net 
TubeU Online Training 
Precision Metalforming Association 
Society of Manufacturing Engineers 
Association of Iron and Steel Engineers 
Steel Tube Institute of North America 
Steel On The Net.com
