Galfan Coating Bundy Tube

Bundy tube, also called Bundy pipe, is a double wall copper brazed steel tube. The manufacture of Bundy tube is a continuous process of rolling a copper coated steel strip through 720 degrees, brazing the outer and inner circle of the strip together by the melted copper layer to form a round tube with a continuous circular seam, and annealing. We are using fully automatic production lines with online process monitoring and continuous fabrication of the Bundy tubes.
The bundy steel tube has fine inside cleanness, high strength, nice elongation, good foundation for late process , anti leakage, anti high pressure explosion, excellent anti corrosion power after surface treatment. It is an ideal material for tubes of  automotive industry.The tube can be provided in coils or cut to length,etc.Thickness of copper coating: ≥3um
If any questions,please contact sales@grandsteeltube.com

  • Description
  • Specifications
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Bundy tubes with hot-dip GALFAN coating, also called hot-dip zinc-aluminum alloy coating, are now used more and more for automotive fluid transferring.

GALFAN is a special metal alloy consisting 5% of aluminum and 95% zinc alloy. It is a perfect material to enhance the corrosion resistance of the Bundy tubes.

Item Requirement
Composition 5% aluminum, balance zinc alloy, per ASTM B750
Thickness 3μm min anywhere on the tube, 15μm averagely
Salt Spray Test 360 hr min

If any questions,you are more than welcome to contact sales@grandsteeltube.com

Outer  dia. 
(φ)
Wall thickness
(mm)
Mechanical Property
 Weight 
(g/m)
Weight  
Zinc (g/m)
Weight  PVF (g/m)
Resistance to pressure (Mpa)
Length
(m/ton)
4.75(3/16″)
0.7
Yield Strength 6s ≥180Mpa
Elongation δ≥25%
Tensile Strength 6s ≥290Mpa
70
71
72
88
13889
6
91
92
93
70
10753
6.35(1/4″)
97
98
99
64
10101
8(5/16″)
125
127
128
51
7813
9.52(3/8″)
152
153
154
43
6494
10
160
162
163
41
6135
12
194
196
198
34
5051
8
1
172
174
175
72
5714
10
220
222
223
58
4484
12
270
272
274
48
3650
15
346
349
351
36
2849
Test item
Flaring Test  / Bending Test /  Flattening Test /  Pressure Test / Corrosion test
Galvanization and Coating Types
Mark
Type
typical appearance
Anti-corrosion time
A
Copper tube
Bright or light blue
6-8h
B
White zinc tube
Rainbow and white
24-36h
C
Color zinc tube
Yellow rainbow
72-96h
D
Olive green tube
Olive green or bronze color
96-144h
 
E
PVF tube(China)
 
Black
≥1000h
PVF tube(Dupont)
≥3000h

If any questions,you are more than welcome to contact sales@grandsteeltube.com

Our workshop,located in Changzhou,covers an area of 13,000 square meters equipped with the state-of-art facilities to manufacture the double wall bundy steel tubes and single wall bundy steel tubes .The monthly production capacity is 3,000,000 meters.

The materials are :SPCC,SPHC,SPCE,BHG1,BHG2,other materials can be achieved after discussion.

Mainly sizes are:4.76x0.70mm,6.35x0.70mm,8x0.70mm,9.53x0.70mm,10x0.70mm,12x0.70mm other size like:4.00x0.5mm,3.18x0.7mm,2.60x0.50mm is also produced according the requirements.other sizes can be achieved after discussion.

1. Production of  double wall bundy steel tubes & single wall bundy steel tubes since 2005.

2. Working with customers from Europe,West Asia,South America,since 2006etc

3.  Samples can be delivered within 10 days after confirmation

4.  40 days as the production period and delivery after order confirmation.

5.  200,000 meters of copper coated bundy steel tube  in stock.

6.  Sizes can be offered from OD:2.60mmxWT:0.5mm to OD:12.7mmxWT:1.24mm

7.  Third party inspection like:TUV,BV,SGS,etc accepted

8.  Professional team assists your special tube requirements.

9.  Other related tubes can be offered with competitive prices:white/yellow/olive green galvanized double wall bundy tubes,PVF bundy steel tubes;etc

We have been delivering these tubes to Peru,France,Russia,South Korea for the automotive industry,since 2006.etc.If any questions,you are more than welcome to contact sales@grandsteeltube.com

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