D-Head 420

Orbital weld heads for seamless multi-pass GTAW pipe welding connections

Orbital Weld Head for Multipass GTAW Pipe Welding

The Magnatech D Weld Head is designed to make pipe-to-pipe and pipe-to-fitting welds. It is β€œfull functionβ€? – with the capability of reproducing all the motions of a skilled welder. The D Weld Head is used for applications with radial and axial clearance constraints. Interchangeable guide rings provide mounting on the pipe, and allow the D Weld Head to cover a broad size range: 1β€? - 14β€?. The D Weld Head improves productivity by increasing duty cycle, reducing repair rates, and producing welds of consistent quality.

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Guide Rings Mount Head on Pipe. Available for all nominal pipe sizes 48 mm –
356 mm ( 11/2β€? – 14β€?) and Tube sizes 44 mm – 127 mm (1.75β€? – 5β€? O.D.)



D HEAD 420


  • Fossil Power Plant Construction/Maintenance
  • Steam Generation Equipment Fabrication
  • Nuclear Power Plant Construction/Maintenance
  • Chemical/Petrochemical Facility Construction Maintenance
  • Shipyard Construction
  • Gas Transmission Pipelines
  • Process Piping


  • Full function Capability (Torch Rotation, Filler Wire Feed, Electronic Arc Gap Control, Electronic Oscillation)
  • Broad size range
  • Guide Rings available for standard Tube/Pipe sizes
  • Waterproof Carry Case/Tool Kit standard
  • Water-Cooled Torch uses standard Expendables

    Guide Rings Mount Head on Pipe. Available for all nominal pipe sizes 48 mm – 356 mm ( 11/2β€? – 14β€?) and Tube sizes 44 mm – 127 mm (1.75β€? – 5β€? O.D.)

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Power Supply Compatibility

PIPEMASTER 515 | Quote Request

PIPEMASTER 516 | Quote Request

420 D HEAD

Application Multi-pass orbital GTAW pipe-to-pipe, pipe-to-fitting
Cable length 7.6 m (25’) standard. Extension cables available
Pipe (tube) size range 25 – 356 mm (1 – 14β€?)
Filler wire module Wire size
0.8, 0.9, 1.0 mm (0.03β€?, 0.035β€?, 0.040β€?)
Max. speed capability 2540 mm/min. (100 IPM)
Spool size 1 kg (2 lbs) std; 0.5 kg (1 lbs) low profile
Oscillation module Max. oscillation stroke amplitude
16 mm (0.6725β€?)
Max. oscillation speed 1520 mm/min. (60 IPM)
Oscillation dwell 0 – 1 second
Cross seam adjustment Β± 6.4 mm (0.25β€?)
Arc gap control module 13 mm (0.5β€?) stroke. Additional mechanical adjustment allows welding heavier wall pipe
Torch propulsion module 250 mm (10 IPM) maximum rotation speed
Water-cooled torch 200 A continuous capability
Torch adjustment capability Torch lead/lag adjustment
Β± 15 degrees (manual)
Torch tilt adjustment Β± 10 degrees (manual)
Power supply compatibility Pipemaster 515, Pipemaster 516
Weight 3.6 kg (8 lbs.)
Axial Clearance Torch C/L to Rear Extremity: 220 mm (8.51β€?)
Torch C/L to Front Extremity: 10 mm (0.41β€?)
β€œAβ€? Radial Clearance
Requirement for Pipe 44.45mm (1.75β€?) and larger
64 mm (2.5β€?) with Standard Spool*

51 mm (2.0β€?) with Low Profile Spool*
* For pipe/tube OD’s less than 44.45mm (1.75β€?), Radial Clearance Requirement increases with decreasing diameter. Contact Factory.