3.16*0.5mm Steel Bundy Tube EN10305-1 DC04 Double Wall Thinnest Copper Coated Pipe

EN10305-1 Brazed Double Wall copper-coated Bundy tube used for Compressor
 
Double Walled Steel Tubing is a steel tube for pressure piping, which is manufactured from electrolytic copper-coated steel strip (both surfaces). The strip is wound into a continuous tubular with a double-layered wall and then copper brazed in a special furnace using the coated copper as filler metal.
The tube possesses higher withstanding pressure and higher vibration fatigue strength. Furthermore, the tube is also equipped with superior properties such as solderability, traceability, bendability, and workability in end terminal preparation. As a pressure tubing material with extensive reliability and good processing characteristics, this tube is used for several purposes, such as brake tubing, the power steering on vehicles, and many more.
 
Brazed Double Wall Tubing
Double-wall tubing is produced by roll forming copper-coated carbon steel strip 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-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.
 
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