Double Wall Tube System

Davis Aircraft Products is the world leader in specifying, designing, fabricating FAR 25.863 compliant tubing systems. Davis Aircraft Products utilizes the patented Double Wall Tube System technology to ensure the lightest and most robust designs for double and triple walled Aerospace, Marine and Automotive fluid conveyance. We have a complete library of tubes, fittings, and connectors to meet your coaxial tubing requirements .250 “thru 6.0”.

Double wall tube system is a lightweight solution that makes bending tube-within-a-tube practical and easy. The double wall tube system meets FAA/JAA requirements for shrouded fuel lines in passenger and cargo transports.  It also provides a wide variety of advantages, many of which are listed below:

Advantages of Double Wall Tube Systems:

  • 20% to 60% manufacturing cost savings
  • 25% to 60% weight savings
  • 30% to 80% savings on detail part count
  • Capable of smaller bends
  • Less on aircraft assembly
  • More damage tolerant
  • Fewer couplings required
  • Increased system reliability
  • Securely supports inner fuel line
  • Provides integral electrical bonding

Disadvantages of other (Non- Davis Aircraft) Systems:

  • Require more time consuming, difficult and costly assembly in aircraft.
  • Greater risk of damaging parts when assembling in tight or limited spaces.
  • Require customized detail part design and manufacture from outside suppliers.
  • Longer, more expensive design cycle time.