Single Wall Welded Steel Tube For Heat Exchangers

Single wall welded steel tube of small diameter is widely used in automotive, refrigeration, air conditioning and other heat exchanging applications.

Single wall welded steel tube is also called Single Wall Bundy Tube in some areas of the world, because it is made from steel strips from thin steel sheets, and many of this kind of tubes are coated with copper, zinc or other surface protection materials just like the double wall brazed Bundy tubes are.

High Dimensional Accuracy
Satisfying Mechanical Properties
Clean Inside Surface
Flexibility of Customized Sizes

Regular Sizes

OD, mm	Thickness, mm
OD, mm	0.50	0.60	0.65	0.70	0.80	0.90	1.00	1.20
3.18	○	—	—	—	—	—	—	—
4.00	○	○	○	○	—	—	—	—
4.76	○	○	○	○	○	—	—	—
5.00	○	○	○	○	○	—	—	—
6.00	○	○	○	○	○	○	○	○
6.35	○	○	○	○	○	○	○	○
7.94	—	○	○	○	○	○	○	○
8.00	—	○	○	○	○	○	○	○
9.53	—	○	○	○	○	○	○	○
10.00	—	○	○	○	○	○	○	○
12.00	—	○	○	○	○	○	○	○
12.70	—	○	○	○	○	○	○	○

Tolerances

OD	Basic Accuracy	High Accuracy
<4.76	±0.08mm	±0.05mm
4.76 ~ 8.00	±0.12mm	±0.07mm
>8.00 ~ 12.00	±0.16mm	±0.10mm
>12.00	±0.20mm	±0.12mm

Mechanical Properties

Type	Tensile, Mpa	Yield, Mpa	Elongation, %
Soft Tube	280-320	≥170	≥35
Hard Tube	320-350	≥200	≥25