Brazed Single Wall Steel Tube EN10305-1 DC04 Zinc Coated Bundy Tube 4.76*0.65mm

EN10305-1 DC04 Brazed Single Wall Zinc coated Bundy tube 4.76*0.65mm

Single-Wall Steel Tubing with the same coating range as double-wall tubing but with the addition of a nickel-coated internal diameter to withstand the corrosive environment created by modern-day fuels.

Single & Double Wall Steel Tubing Bundy tubes that can be combined with an extensive range of corrosion- and abrasion-prevention coatings such as NyAl (aluminum and polyamide coating), NyZinc (zinc and polyamide coating), NyGal (Galfan and polyamide coating), PVF and many others. These tubes can also be provided with a polypropylene jacket to provide outstanding abrasion resistance.

Brazed Double Wall Tubing

Double-wall tubing is produced by roll forming copper-coated carbon steel strips into a double wrapped tubular shape as shown in the cross-sectional diagram. The formed tube is passed through a controlled atmosphere brazing furnace where it is fused together to produce a sealed tube. Double-wall tubing is ideally suited for use in applications that are subject to high levels of vibration and fatigue, such as household and commercial refrigeration compressors.

Single and Double Wall Bundy Tubes

Type	Double Wall (TDW)	Single Wall (TSW)
Welding Technique	Copper brazing	High-frequency ERW
Resizing Method	Cold drawn	Cold drawn
Seam	720 Degree seamless	Straight-line seamed
Dimensional Accuracy	High	High
Strength	Mostly made hard	Can be soft or hard
Inside Cleanliness	Good	Poor
Vibration Resistance	Strong	Poor
Safety against Pressure	High	Low
Application	Automobile brake lines, fuel lines, transmission cooler lines, power steering lines; certain hydraulic pipes, etc;	AC, refrigeration, heat exchangers, automobile fuel lines; compressors, etc;
Original Surface	Copper	None (steel)
Surface Coating	Copper Zinc GALFAN	Copper Zinc