Precision Stainless Steel Micro Tubing for Capillary Tube Applications
Capillary Tubes in Aerospace: Critical for Flight Safety
Aerospace and aviation systems demand the highest reliability from every component. Stainless steel capillary tubes serve as essential components in hydraulic systems, fuel management, environmental control, and instrumentation. Both 304 and 316 stainless steel grades are used, with material selection based on operating conditions, weight requirements, and regulatory standards.
Applications in Aerospace
Hydraulic Systems
- Hydraulic pressure sensing lines: Transmit pressure signals to sensors and gauges
- Actuator control lines: Precision fluid delivery for flight control actuators
- Leak detection systems: Monitoring hydraulic fluid integrity
Fuel Systems
- Fuel quantity sensing lines: Capacitance probe tubing
- Fuel temperature sensing: Thermowell tubes for temperature measurement
- Fuel pressure sensing: Pressure transducer lines
Environmental Control Systems (ECS)
- Pressure sensing lines: Cabin pressure monitoring
- Temperature measurement: Thermocouple sheaths
- Air sampling: Air quality monitoring
Instrumentation & Sensing
- Pitot-static systems: Airspeed and altitude measurement
- Engine monitoring: Oil pressure, fuel pressure, temperature sensing
- Flight data recording: Sensor signal transmission
Material Selection for Aerospace
| Application | Recommended Grade | Reason |
|---|---|---|
| Hydraulic systems | 304 | High strength, pressure rating |
| Fuel systems | 304 | Fuel compatibility, pressure rating |
| Engine components | 321/347 | High temperature stability |
| Marine aerospace | 316 | Corrosion resistance |
Aerospace Standards
- AMS 5563 — Seamless stainless steel tubing
- AMS 5564 — Welded stainless steel tubing
- ASTM A269/A269M — Seamless and welded austenitic stainless steel tubing
- AS9100 — Aerospace quality management
- NADCAP — Special process accreditation
Common Sizes for Aerospace
| Application | OD (mm) | Wall (mm) |
|---|---|---|
| Hydraulic sensing | 3.0-6.0 | 0.3-0.5 |
| Fuel sensing | 2.0-4.0 | 0.25-0.5 |
| Temperature sensing | 3.0-6.0 | 0.3-0.5 |
| Instrumentation | 1.5-3.0 | 0.2-0.3 |
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Leading Stainless Steel Capillary Tube Factory. 1,400+ standard sizes IN STOCK & ready to ship worldwide! High precision, factory-direct price.
