What We Do

A & B Welding is at the forefront of specialist welding techniques in the Northern Territory. We have developed a number of welding procedures that meet the strict compliance of ASME IX and ASME B31.3, AWS D1.1 and AWS D1.6 and relevant Australian and International codes/standards for piping and structural.

We are very experienced in all types of pipe fabrications from basic straight spools to highly complex configurations for low-pressure systems to extremely high-pressure applications.

Our combination of operation/management systems along with practical hands on experience along with our flexible and loyal workforce is another key to our continued success, providing us with a real advantage.

Fabrication & Welding

As the very first Australian company to gain ISO 3834, our experience and technical knowledge of even the most complex fabrication and welding applications is unrivalled. 


  • Pipe spooling
  • Low and high-pressure piping
  • Metering skids
  • Heat exchanger piping
  • Pig launcher/receivers
  • Crossovers
  • Flow Lines
  • Stair Cases
  • Work access platforms & walkways
  • Pipe supports
  • Structural fabrication
  • Pressure vessels
  • Tanker repairs


  • Carbon steels
  • Low-temperature carbon steels
  • Austenitic stainless steel
  • Duplex stainless steel
  • Low V Alloyed Cr-Mo (Ni) Steels
  • Cr-Mo steels
  • Cu-Ni alloys
  • Aluminium brass
  • Copper


  • Manual Metal Arc (MMAW)
  • Gas Tungsten Arc (GTAW)
  • Flux Core (FCAW)
  • Gas Metal Arc (GMAW)


  • ASME B31.3
  • AWS D1.1
  • AWS D1.6
  • AS 4041
  • AS 3992
  • AS/NZS 1554 Parts 1 and 6
  • AS 2885.2
  • ISO 15156
  • NACE MR0175


Our hardworking employees are fully qualified and certified to work off-shore, in remote locations and efficiently within strict timelines and budgets. 


Site Works  

  • Offshore and remote site works
  • Hydrostatic testing
  • Pneumatic testing
  • Flange integritie & flange management
  • Bolt torquing
  • QA/QC welding inspections
  • Pipe spool repairs & replacement
  • Structural fabrication & modifications

AA & B Welding service and carry out site works on the Amadeus, Bonaparte WPP & McArthur River gas transmission pipelines, Numerous Power Generation sites across the Territory as well as various Fuel farm, Gas plant, Mining and Defence facilities 

A & B Welding commenced offshore work in 1987 on the Jabiru Venture, the first FPSO in Australian waters. We have extensive experience and today we provide labour hire to perform maintenance and shut down scopes on a number of oil and gas facilities.  


  • Oil & Gas
  • Power Generation
  • Petro Chemical
  • Defence
  • Marine
  • Mining

Fabrication Workshop

Our custom built facility is located at 18 Dawson Street, East Arm and features 2,200 m2 undercover workshop and a 5,747 m2 hardstand plus offices and amenities. There’s no job too big or too small.


Fabrication Equipment

  • Welding Machines up to 600 amps
  • Diesel Welding Machine
  • Positioners 2t up to 5t
  • Punch & Shear Machine 60t
  • Compressors up to 70 CuFm
  • Lathe
  • Bandsaw
  • Drill Presses
  • Plasma Cutter 40mm

Bridge Cranes

  • 5T in undercover awning
  • 10T in workshop
  • 6 metres under hook height


  • Service vehicles
  • Light truck


  • 6M x 6M clearance of roller shutters
  • Semi-trailer ability to turn around in yard
  • 14m x 8m workshop access

Specialised Services

We have extensive experience dealing with a range of complex specifications and offer specialised services such as emergency response hot tapping and hydrostatic testing.


  • Live welding
  • Offshore and remote site work
  • Exotic materials
  • Thorough understanding of Australian and Internation standards and client specifications
  • Hydrostatic testing