Double wall copper brazed steel tubing, also know as Bundy tube, is the economical alternative to seamless tube. It has many of the samequalities as seamless tubing and is suitable for most high pressureapplications.

• High Dimensional Accuracy

• Satisfying Mechanical Propertie

• Clean Inside Surface

We are offering Bundy tubes of regular sizes, and at the same time capable of fabricating tubes of customized sizes.

• Application

• Regular Sizes & Stock

• Tolerances

• Customized Sizes

• Material and Mechanical Performance

• Corrossion Protection

• Inspection

• Manufacture Standard




Regular Size & Stock

Bundy tubes of the following table listed sizes are available in stock or to be produced upon being ordered.

• A -Available as regular stock

• U -Stock availability unstable, and needs to be pre-ordered

Dimensions
OD		Wall Thickness
mm	in.	0.7mm	1.0mm
4		U
4.76	3/16	A
6		A
6.35	1/4	A
8	5/16	A	U
9.52	3/8	A	U
10		A	U
12		U	U
12.7	1/2	A	U
15		U	U




Customized Sizes

We are capable of fabricating Bundy tube sizes which are not regularly used. By combinatingone or more processes of cold draw and annealing, Bundy tubes can be made to many other sizes to meet demands for special applications.

Please contact us to discuss in details.




Tolerances

Tolerances (mm)
OD	Tolerance	Wall Thickness	Tolerance
<4.76	±0.05	0.7	±0.08
4.76-8	±0.08	1	±0.1
>8	±0.15




Material and Mechanical Performance

Material
Low carbon steel
Mechanical Properties
Tensil Strength	42000psi (290MPa)
Yield Strength	26100psi (180MPa)
Elongation	≥25%
Expansion	≥20%
Inside SurfaceCleanliness	≤0.16g/m2