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.

Cut and bent tubes

Equipment and methods of production

ProcessSawingSawingShearingRotary cut off
RangeMethod 1Method 2Method 3Method 4
Outside
diameter
12 – 102 mm10 – 81mm15 – 152 mm20 – 90 mm
Wall
thickness
1 – 3 mm0,5 – 6 mmmax. 7 % D0,7 – 12 mm
Length of
a tube
25 – 4500 mm15 – 340 mm25 – 780 mm150 – 2000 mm
Tolerances
of tubes
± 0,25 mm± 0,025 mm± 0,25 mm± 0,11 – ± 0,19 mm
Stability of the manufacturing processCpK > 1,67CpK > 1,67
Tube endsPassivating the ends at
L = 100 – 4500 mm
Beveling tube endsBeveling tube endsBeveling 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 protectionWashing and passivation at
L = 100 – 3000 mm
Without protection
or oiled
Without protection
or oiled
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.

Tubes bound with a steel band
Tubes bound with a steel band
Tubes bound with a steel band and wrapped in plastic sheets
Tubes bound with a steel band and wrapped in plastic sheets
Packing in metal pallets
Packing in metal pallets
Packing in metal containers
Packing in metal containers
Packing in paper boxes
Packing in paper boxes

Processing capabilities of precision seamless tubes

Cutting tubes to exact lengths:

• sawing
• shearing
• rotary cut-off

Beveling tube ends
Tube bending

Certificates for cut tubes

According to DIN 50049 – EN 10204:

2.2 or 3.1.B.

Tube bending

Bend angle Rm

20 253240506080100125160200250
D=10t≥1
D=12t≥1
D=14t≥1
D=15t≥1
D=16t≥1
D=18t≥1
D=20t≥1
D=22t≥1t=D/20,
D=24t≥1Ri=2D
D=25t≥1t=D/30,
D=28t≥1Ri=3D
D=30t≥1,5t=D/50,
D=32t≥1,5Ri=4,5D
D=35t≥1,5
D=38t≥1,5
D=40t≥1,5
D=42t≥1,5
bending of tubes

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

Methods of producing cut tubes

Contact us

Are you interested in cooperation? Send us an inquiry, or order the goods directly from stock.
+421 48 6451111 | admin@zelpo.sk

Download the Product portfolio of steel tubes