Aircraft Fluid-Line Identification and Materials
General identification, construction and material considerations for aircraft fluid lines.
Key reference points
- Markers identify function, contents and hazards.
- Rigid tube and flexible hose serve different movement needs.
- Material and size must match approved aircraft data.
Organised training notes
1Line identification
Colour, words, geometric symbols, tags or approved paint can identify line function, contents and primary hazard.
2Rigid tubing
Metal tubing suits stationary installations and longer runs where the design controls support, vibration and movement.
3Flexible hose
Flexible hose accommodates relative movement or vibration within its specified pressure, temperature, bend-radius and life limits.
4Tubing material
Aluminium, corrosion-resistant steel and titanium tubing serve different pressure, temperature, weight and fire-zone requirements.
5Complete identification
Material, outside diameter, wall thickness, system, pressure and fitting type must match the approved aircraft data.
This summary is not approved repair or maintenance data. Do not inspect, classify, select material, alter structure or perform a repair from this page alone. Use the current applicable SRM, AMM, engineering order, drawing and company procedures.