SIngle & Double Wall Steel Tubing

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.

Single and Double Wall Bundy Tubes
TypeDouble Wall (TDW)Single Wall (TSW)
Welding TechniqueCopper brazingHigh frequency ERW
Resizing MethodCold drawnCold drawn
Seam720 Degree seamlessStraight line seamed
Dimensional AccuracyHighHigh
StrengthMostly made hardCan be soft or hard
Inside ClearlinessGoodPoor
Vibration ResistanceStrongPoor
Safety against PressureHighLow
ApplicationAutomobile brake lines, fuel lines, transmission cooler lines, power steering lines; certain hydraulic pipes, etc;AC, refrigeration, heat exchanagers, automobile fuel lines; compressors, etc;
Original SurfaceCopperNone (steel)
Surface CoatingCopper

Zinc

GALFAN

PVF

Nylon

Epoxy

Nickel

Zinc

GALFAN

PVF

Nylon

Epoxy

Nickel

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