Cut and bent tubes

Seamless steel tubes can be supplied as cut tubes and bent tubes. Processed are mostly precision cold drawn tubes. Upon the requirement hot-rolled tubes can be supplied in the form of semi-finished product. Cut tubes are designed especially for manufacturers of automotive components. Just in time supplies are possible and also to create buffer stocks.

Processing capabilities of precision seamless tubes


Cutting tubes to exact lengths
- sawing
- shearing
- rotary cut-off
Beveling tube ends
Tube bending

Equipment and methods of production

Process
Sawing
Sawing
Shearing
Rotary cut off
Range
Method 1
Method 2
Method 3
Method 4
Outside
diameter
12 - 102 mm
10 - 81mm
15 - 152 mm
20 - 90 mm
Wall
thickness
1 - 3 mm
0,5 - 6 mm
max. 7 % D
0,7 - 12 mm
Length of
a tube
25 - 4500 mm
15 - 340 mm
25 - 780 mm
150 - 2000 mm
Tolerances
of tubes
± 0,25 mm
± 0,025 mm
± 0,25 mm
± 0,11 - ± 0,19 mm
Stability of the manufacturing process
CpK > 1,67
CpK > 1,67
Tube ends
Passivating the ends at L = 100 - 4500 mm

Beveling tube ends
D = 10 - 81 mm
L = 15 - 340 mm
5° - 85°
(min. d = 12 mm)
D = 15 - 70 mm
L = 30 - 690 mm
D = 20 - 90 mm
L = 150 - 2000 mm
5° - 85°
(min. d = 18 mm)
Surface protection
Washing and passivation at
L = 100 - 3000 mm

without protection or oiled

Packaging of cut tubes

Semi-finished products are delivered with respect to their dimensions and in agreement with the customer-packed in bundles, placed on metal pallets, folding box pallets or packed in cartons which are stored on wooden pallets.

Certificates for cut tubes

According to DIN 50049 - EN 10204 - 2.2 or 3.1.B.

Methods of producing cut tubes

Tube bending

The tubes are bent on CNC bending equipment with the possibility of bending in three levels with no distortion of the tube bend (see table).
Bend parameters:

- maximum dimension of bent tube- 42 x 2,5 mm
- bending radius- 12 – 260 mm
- maximum bending angle- 187°
- tolerance of the banding angle- ± 0,1°
- length of the tube up to the last bend - max 3000 mm
- length tolerance- 0,1 mm

Bend angle Rm
20
25
32
40
50
60
80
100
125
160
200
250
D = 10
t ≥ 1
D = 12
t ≥ 1
D = 14
t ≥ 1
D = 15
t ≥ 1
D = 16
t ≥ 1
D = 18
t ≥ 1
D = 20
t ≥ 1
D = 22
t ≥ 1
t = D / 20
Ri = 2D
D = 24
t ≥ 1
D = 25
t ≥ 1
t = D / 30
Ri = 3D
D = 28
t ≥ 1
D = 30
t ≥ 1,5
t = D / 50
Ri = 4,5D
D = 32
t ≥ 1,5

D = 35
t ≥ 1,5
D = 38
t ≥ 1,5
D = 40
t ≥ 1,5
D = 42
t ≥ 1,5

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