Welded tubes

High-performance TIG-welded tubes in stainless steel, made by Tecnofar.

Tecnofar S.p.A.’s welded tubes are produced by cold-roll forming strips of stainless steel and of alloys with a high nickel content.

Today, our production department is equipped with 11 modern TIG welding lines (weld joint efficiency factor V = 1), with calibration of the outer diameter and the option for heat treatment in a built-in controlled atmosphere.

The forming rolls, designed and specially manufactured within our company, make the precision and quality our customers seek a reality across our entire welded-tube production range (outer diameter ranging from 3 to 76 mm).

Each production line incorporates a built-in system for weld testing using eddy currents and a system for measuring the outer diameter. These are joined by additional automatic testing systems we have developed internally, the fruit of long experience in tube production and of ongoing research to improve quality and customer satisfaction.

In 1999, Tecnofar S.p.A. equipped its welding lines with induction furnaces for the heat treatment of its tubes. This technology makes it possible to maintain the metal’s natural shine, while simultaneously lending it malleability and consistent mechanical properties. Thanks to these characteristics, Tecnofar S.p.A.’s welded tubes are highly prized at the international level.

Rolled welded tubes

Standard production range

Outer diameter

from 3.00 to 15.00 mm

Tolerances

+/- 0.10 mm
before coiling


Outer diameter

from 15.01 to 25.00 mm

Tolerances

+/- 0.15 mm
before coiling


Thickness

from 0.15 to 1.50 mm

Tolerances

+/- 10%


Lower tolerances can be evaluated on request.

Standard testing

  • 100% in-line eddy-current testing
  • 100% dimensional inspection using an in-line laser gauge
  • Visual inspections of surfaces/cleanliness
  • Testing with EN 10204-2.2 Certificate

Tests on request

  • Underwater pressure test at 200 bar
  • Testing with EN 10204-3.1 Certificate
  • Mechanical testing: traction, hardness, bend, flange
  • Metallographic testing
  • Corrosion testing

State of the material

  • Unannealed
  • Heat treated in line, in a controlled atmosphere, to obtain a tube that is malleable and has consistent mechanical properties

Finishes

  • Polished from the profiling process
  • Bright annealed
  • Debeaded
  • Identification mark for production chain traceability
  • Internally pickled
  • Brushed

Coiling style

  • Coil on coil OD 5 – 25 mm
  • Free coils OD 3 – 25 mm

Roll sizes

Depending on tube dimensions:

  • Outer diameter 650 – 1500 mm
  • Inner diameter 600 – 1200 mm

Type of packaging:

Palletized cartons:

  • 75 x 75 x H 110 cm
  • 100 x 100 x H 100 cm
  • 120 x 120 x H 100 cm

Metal packing

Welded bar tubes

Standard production range

Outer diameter

from 3.00 to 15.00 mm

Tolerances

+/- 0.10 mm


Outer diameter

from 15.01 to 40.00 mm

Tolerances

+/- 0.15 mm


Outer diameter

from 40.01 to 76.00 mm

Tolerances

+/- 0,30 mm


Thickness

from 0,15 to 3,00 mm

Tolerances

+/- 10%


Lower tolerances can be evaluated on request.

Length

from 2600 to 26000 mm
With standard tolerances or tolerances specified by the customer.

Standard testing

  • 100% in-line eddy-current testing
  • 100% eddy-current testing after straightening
  • 100% dimensional inspection using an in-line laser gauge
  • Visual inspection of surfaces/cleanliness
  • Testing with EN 10204-2.2 Certificate

Tests on request

  • 100% pneumatic testing
  • Hydrostatic pressure test and up to 180 bar
  • Testing with EN 10204-3.1 Certificate
  • Mechanical testing: traction, hardness, bend, flange
  • Metallographic testing
  • Corrosion testing

State of the material

  • Unannealed
  • Heat treated in line, in a controlled atmosphere, to obtain a tube that is malleable and has consistent mechanical properties

Finishes

  • Polished from the profiling process
  • Bright annealed
  • Debeaded (external weld bead removed)
  • Rolled (internal weld bead removed)
  • Brushed
  • Satin finish
  • Cut to size and deburred
  • Washed
  • Pickled
  • Identification mark for production chain traceability

Type of packaging

  • Wooden crates
  • Bundles secured with strap banding
  • Palletized cartons
  • Tubes packed individually

Welded tubes in cut pieces

Standard production range

Outer diameter

from 3.00 to 15.00 mm

Tolerances

+/- 0.10 mm


Outer diameter

from 15.01 to 40.00 mm

Tolerances

+/- 0.15 mm


Outer diameter

from 40.01 to 76.00 mm

Tolerances

+/- 0,30 mm


Thickness

from 0,15 to 3,00 mm

Tolerances

+/- 10%


Lower tolerances can be evaluated on request.

Length

Starting from 3 mm; cut to size based on customer request.

Standard testing

  • Dimensional inspection
  • Mechanical testing: traction, hardness, bend, flange
  • Visual inspection of surfaces/cleanliness

Tests on request

  • Testing with EN 10204-3.1 Certificate
  • 100% length check
  • 100% pneumatic testing
  • Metallographic testing
  • Corrosion testing

State of the material

  • Unannealed
  • Heat treated in line, in a controlled atmosphere, to obtain a tube that is malleable and has consistent mechanical properties

Finishes

  • Polished from the profiling process
  • Bright annealed
  • With surface brushed or satin finished, depending on the length of the piece
  • Deburred by means of tumbling or grinding
  • Washed
  • Pickled
  • Special processes available on request

Type of packaging

  • Cardboard boxes
  • Palletized cartons
  • Wooden crates
  • Envelopes
  • Packaged according to customer request

Technical Support.

We don't stop at co-designing, producing and guaranteeing high quality standards in the sector of stainless steel tubing. Our support continues after purchase as well, through our high-quality support service, dedicated to resolving and fulfilling customers’ questions and requests.

Request support