Welding Tools and Equipment
D-Head Weld Heads
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D-Head Weld Head - Orbital Pipe Welding / Automated Welding Equipment D-Head

D-Head installed on Boiler Tubes

D-Head

D-Head in the field

D-Head in the field

The Perfect Weld

The D-Head model weld head is "full function" - with the capability of reproducing all the precise motions of a skilled manual GTAW welder.  It is specifically designed for multipass pipe welding applications.  The weld head consistently produces welds meeting the most stringent code quality standards.  The D-Head is used for applications with radial and axial clearance constraints.

Used with the Pipemaster Power Source Models, this weld head improves productivity by increasing duty cycle, reducing repair rates and producing welds of consistent quality.

The D-Head is a compact head for smaller diameter pipe applications with limited radial and axial clearance around the weld.  Ideal for orbital pipe welding.

WELD HEAD MOUNTING/ROTATION

The weld head is mounted on the pipe by means of metal Guide Rings, which are available for all standard pipe / tube sizes.  The weld head mounts entirely on one side of the joint, allowing use for pipe-to-fitting welds.

 

WIRE FEEDER

The compact Head-mounted wire feeder is electronically controlled for accurate and repeatable filler wire delivery.  It mounts a standard 0.9 kg (2lbs.) spool.  For applications requiring minimum radial clearance, a special "Low Profile" wire spool is used.

 

TORCH OSCILLATION (WEAVE)

The width and speed of the torch oscillation stroke are independently programmed.  Torch "Dwell" is independently adjustable at both oscillation stroke end points.  A "Cross Seam Adjustment" steering control on the remote Pendant allows the welder to track the torch on the weld seam without the need for manual adjustments near the arc.  Pulsed current is automatically synchronized with torch oscillation when both functions are operated simultaneously.

 

ARC GAP CONTROL (ARC VOLTAGE CONTROL)

The Arc Gap Control electronically maintains a desired arc length as the torch rotates around the pipe.

 

USE ON PREHEATED PIPES

The D-Head drive system incorporates heat-tolerant components and a water-cooled housing for use on CrMo and other alloys requiring preheat.  Mounting the head on an oversize Guide Ring with adapter feet creates an air space, preventing heat damage.

                 
Process: GTAW, TIG
                 
Weld Head Type: Open arc.  Entire Head rotates around pipe.  Mounts on pipe using guide rings.
                 
Pipe Size Range: 25.4mm - 355.6mm (1" - 14") OD (Use on pipe up to 1219.2mm/48" possible with adapter)  
                   
Functions: Torch rotation, Filler wire feed, Electronic torch oscillation, Electronic arc gap (AVC) control  
     
Features:
  • Multipass welding of tubes / pipes in all gravity positions

  • Broad pipe size range

  • Full function capability (torch rotation, filler wire feed, electronic arc gap control, electronic oscillation)

  • Water cooled torch uses standard expendables

  • Welds pipe 2.5cm (1") to 35.6cm (14") & larger sizes with adapter kit

  • Welds meet all code standards

D-Head completed welds

                   
Options:
  • Socket Welding Kit and Tilt AVC option for angle torch applications

  • Low Profile Kit for limited radial clearance applications

  • Trailing Gas Shield for welding reactive metals

Offshore Platform
Applications:
  • Fossil Power Plant Construction & Maintenance

  • Steam Generation Equipment Fabrication

  • Nuclear Power Plant Maintenance

  • Chemical/Petrochemical Facility Construction & Maintenance

  • Shipyard Construction

  • Gas Transmission Pipelines

  • Process Piping

  • Industrial

  • Contractors

Nuclear Facility
     
WELD HEAD / CONTROLS SPECIFICATIONS
Application

Pipe (Tube) Size - 25mm (1.0") and larger

Filler Wire Module
Wire Size 0.8mm, 0.9mm, 1.0mm (.030", 0.35", 0.40")
Max. Speed Capability 0 - 254cm/min (100ipm)
Spool Size

1kg (2lbs) Standard

0.5kg (1lb) Low Profile

Oscillation Module
Max. Oscillation Stroke Amplitude 16mm (0.625")
Max. Oscillation Speed 152cm (60") per minute
Oscillation Dwell 0 - 1 second
Cross Seam Adjustment ±6.4mm (0.25")
Arc Gap Control Module
Stroke

1.3cm (0.5")

Torch Propulsion Module

Max. Rotation Speed

25cm (10") per minute

Water-Cooled Torch
Amperage Capability 200A continuous
Torch Adjustment Capability
Torch Lead/Lag Adjustment

±15 degrees (manual)

Torch Tilt Adjustment ±10 degrees (manual)
Head Weight & Dimensions
Weight 3.6kg (8lbs.)
Axial Clearance  
    Torch C/L to Rear Extremity 22cm (8.51")
    Torch C/L to Front Extremity 1cm (0.41")
Radial Clearance

6.4cm (2.5") with Standard Spool

5.1cm (2.0") with Low Profile Spool

Use With All Pipemaster models
                   

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