BUNDY
TUBES
Bundy Tube, originally called the double wall low carbon steel tube, is now used to refer to single wall low carbon steel tube in many areas, because many of the application and post-processing of the tubes are very similar. This name sometimes confuses many readers.
There are very obvious characteristics of these two types of tubes, and below are some facts of each of them.
We offer both double wall Bundy tubes, and single wall welded tubes, with different surface coating for corrosion protection and long-lasting reliability for your application.
Type
Welding
Technique
Resizing
Method
Seam
Dimensional
Accuracy
Strength
Inside
Clearliness
Vibration
Resistance
Safety Against
Pressure
Application
Original
Surface
Surface
Coating
Double Wall (TDW)
Copper Brazing
Cold Drawn
720 Degree Seamless
High
Mostly Made Hard
Good
Strong
High
Automobile brake lines, fuel lines, transmission cooler lines, power steering lines; certain hydraulic pipes, etc.
Copper
Copper
Zinc
GALFAN
PVF
Nylon
Epoxy
Nickel
Single Wall (TSW)
High Frequency ERW
Cold Drawn
Straight Line Seamed
High
Can Be Soft or Hard
Poor
Poor
Low
AC, refrigeration, heat exchanagers, automobile fuel lines; compressors, etc.
None (Steel)
Zinc
GALFAN
PVF
Nylon
Epoxy
Nickel
Single and Double Wall Bundy Tubes