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The Rotoweld has been automating pipe spool prefabrication around the world for 30 years.

Long pulsed laser-ultrasonic detection laser
Tecnar develops, manufactures and markets advanced sensors to optimize industrial processes.
© Courtesy of Oerlikon Mecto (US) Inc
© Courtesy of University of Notingham
© Courtesy of NRC Canada
References & Cases studies
Rotoweld 3.0 test

Discover the Rotoweld automated work cell


The Rotoweld 3.0 is a fully-automated work cell developed specifically for industrial pipe prefabrication, small pressure vessel manufacturing or other similar 1G welding.

It integrates machine vision, adaptive control and robotics technology in a completely dedicated package that produces high-quality, full-penetration 1G girth welds five times faster than manual SMAW.

Configured for easy set-up and operation, the work cell can process spools from 3" to 42" in diameter and up to 40' in length.


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Get the
Rotoweld 3.0
advantage
High quality weld—every single time High quality weld—every single time
400% productivity increase 400% productivity increase
90% Arc-On time 90% Arc-On time
Minimal welding experience necessary Minimal welding experience necessary
Unique patented technology Unique patented technology
Easy set-up and operation Easy set-up and operation
5x faster than manual SMAW or GTAW 5x faster than manual SMAW or GTAW
Operator-friendly interface Operator-friendly interface
See Rotoweld’s innovation in action

Rotoweld 3.0
the future of 1G welding


The core of the Rotoweld technology is its unique vision-based penetration control system. It enables any operator to perform high-quality girth welds after just a few hours of training.

Like the welder's eyes and hands, the system continuously analyzes the image of the root weld pool picked up by a video camera integrated into the welding arm. Unique algorithms use this information to adjust welding parameters, such as travel speed, wire feed rate, arc voltage or weaving width. This constantly adapts the process to varying conditions, such as changes in gap, alignment, root face or temperature. The computer's fast reaction time means the machine can work at high deposition rates and travel speeds at which weld pool conditions are too critical to be sustained by hand.

One minute per diameter-inch
from root to cap


Our one-take uncut video features:

  • An established spool shop that uses the Rotoweld daily for over 80% of their joints
  • An unedited sequence of an 8-inch. SGH 40 carbon steel pipe being welded to a flange joint
  • Preparation of tacks for automated welding
  • Automated penetration control of the root pass
  • Fill passes and cap
  • Simultaneous loading of the next spool onto the second welding bay for 90% arc-on-time targets
  • Split-second movement of robot from one welding bay to another to start the next spool
See Rotoweld’s innovation in action

NEW FEATURES
ProData log


Track the performance of your Rotoweld and your
welding team from anywhere in the world.

The pro data log records every single event on the Rotoweld, from the puddle camera to the welding power source and torch positions. It gives you the convenience of logging all information about the welding parameters of each joint, plus valuable insights into your welding team and their understanding of how to optimize the Rotoweld each day.

NEW OPTION
Rotoweld Fume Extractor


Advantages:

  • Self-positioning hood with welding carriage
  • Recovers the floor space required to move around mobile units
  • Enhances welder’s focus on operation
  • Easy-to-access pump and filters
  • Silent operation at the welding station
  • Easy to install and more affordable then wall-mounted systems
  • More environmentally friendly than wall-mounted systems

30 years of experience


The picture on the left is Tecnar founder Mr. François Nadeau in the early days of Rotoweld commercialisation. His vision of automating the prefabrication of pipe spools would eventually take him in an incredible journey, one that is still very exciting today for the new generation at Tecnar.

Rotoweld technology was developed and patented by Mr. Nadeau when he was a researcher at the Canadian Research Council in the 1980’s. The vision based automated control of the weld pool penetration is still today the most reliable automation of the STT process for welding a standard opened bevel with the highest productivity and consistent quality.
Citation

We’ve had Rotowelds in our Lebanon plant for over 15 years…These machines quickly became a vital part of our production operations…Through the years, the Tecnar team delivered excellent response, service and parts delivery and replacement…We purchased Tecnar’s latest Rotoweld model, the 3.0. It is a giant leap forward for technical advancement, functionality, performance and up-time. It’s been running for over a year now—absolutely trouble-free. Everything was re-engineered, streamlined and, unlike some of the newer technologies, technically intuitive…The new robot manipulator, standard Siemens controls and “off-the-shelf” hardware place the Tecnar Rotoweld exponentially ahead of all their competitors. Tecnar is more than a quality vendor and supplier—they are a direct part of our Perma-Pipe team!

Gary Renfro
Facilities Director and Chief Engineer
Perma-Pipe Inc.
References

Atlantic Construction
Brent Gedak Welding
Calefaccion Y Ventilation S.A. De C.V.
Dearing Compressor & Pump
Epsilon Industries
Glenfield Engineering
Perma-Pipe
Preferred Energy
PWC Industries
US Engineering Company
More photos

Rotoweld 3.0 technical specifications

  • Average welding time

    • One dia-inch per minute
      Example: 8 minutes for an 8 inches standard wall pipe

  • Materials

    • Carbon steel (including A333 Gr. 6)
    • Stainless steel (304, 316 and similar)
    • Cr-Mo steel alloys
    • Duplex stainless steel

  • Welding processes

    • Root pass

      GMAW (short circuit)

    • Fill pass

      GMAW (spray transfer)

      FCAW (flux core)

      SAW (submerged arc)

  • Rotator

    • Diameter capacity

      75 mm to 1 065 mm
      3 in. to 42 in.

    • Center line clearance to ground

      1 605 mm / 65 in

    • Operation speed range

      0.2 to 2 rpm

    • Load capacity

      1 360 kg / 3 000 lb

    • Maximum torque

      3 955 N-m / 35 000 lb-in

  • Idler roll load capacity

    • 4 535 kg / 10 000 lb

  • Dimensions

    • Width

      2.3 m / 7.5 ft

    • Height

      2.7 m / 8.8 ft

    • Shortest configuration length

      9.2 m / 30 ft

    • Longest configuration length

      23.8 m / 77 ft

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