Our experience in manufacturing Aerospace Ducts is industry-leading for the Airframe of both civil and military programmes.

We support a range of sizes across various materials, such as aluminium, steel, titanium, Inconel and Nimonics, and develop products from concept through volume production and beyond to the provision of spares. Our extensive range of pressing capabilities, combined with the strong skillset of the Sigma team, means we can complete all forming of the ducting details in-house, allowing customers to benefit from a single source of supply. 

In addition, our extensive welding capability allows us to supply a broad range of customers and their ATA Chapter applications, including extensive range ducting integrated into air conditioning, Environmental Control Systems (ECS), Reaction Control Systems (RCS) and other Airframe applications.


  • Beading
  • CMM, AICON lightbox, Laser Scanner
  • Dye Penetrant Inspection
  • Electrical Bond Testing
  • Hand & Mechanical Forming
  • Inert Gas Chamber Welding
  • New Product Introduction
  • Orbital Welding
  • Pressure Test (Air 250 psi, Water/Oil 18,000 psi)
  • Rapid Prototyping (3D Printing)
  • Skilled Coppersmiths & Sheet Metal workers
  • Spot & Seam Welding
  • TIG Welding
  • Torch Brazing
  • X-Ray Inspection
  • Supported by: Full Nadcap Approval, in-house laboratory and Level 3 technicians, in-house treatments, fixture design & manufacture


  • Air Conditioning Ducts
  • Anti-Ice Ducting
  • Auxiliary Power Unit (APU) Ducting
  • Bleed Air Ducting
  • Environmental Control System (ECS) Ducting
  • High Pressure Ducting
  • Low Pressure Ducting
  • NACA Ducting
  • Pylon Ducting
  • Reaction Control System (RCS) Ducting