FH-DX-I
CONDUIT
The tube system that defines the hyperloop environment. A 3.54m outer diameter PosLoop355 steel shell maintains near-vacuum conditions at 100 Pa. Supported by seismic-isolated pylons at 30m intervals, with metal bellows expansion joints and distributed fiber optic leak detection along the full corridor.
Outer Diameter
3.54 m
Operating Pressure
100 Pa
Pylon Spacing
30 m
Drag Reduction
1,021×
FH-DX-I Conduit — Full Specification
Structure
Inner diameter
3.3m
Outer diameter
3.54m
Wall thickness
120mm
Cross-sectional area
8.55m²
Material
PosLoop355
POSCO PosLoop355 datasheet
Hoop stress
1.39MPa
Yield strength (PosLoop355)
355MPa
Safety factor
3
Weight vs. conventional steel
-27%
Steel mass per km
12,100tonnes
Vacuum
Operating pressure
100Pa
Pressure differential
101,225Pa
Drag at 1,000 km/h (vacuum)
37N
Drag at 1,000 km/h (open air)
37,800N
Drag reduction
1,021x
Drag power (vacuum)
10.3kW
Drag power (open air)
10,500kW
European Hyperloop Centre technical briefing
Thermal
Expansion rate
12mm / 100m / 10°C
Seasonal temperature swing
30°C
Joint spacing
100m
Joint type
Metal bellows
Total expansion (9,000 km)
3,240m
Joint count (9,000 km)
90,000
Standard steel thermal expansion coefficient (12 × 10⁻⁶ /°C)
Monitoring
Technology
Distributed fiber optic sensing (Brillouin scattering)
Spatial resolution
1m
Detection time
<1s
Comparable deployment
US natural gas pipeline monitoring (2.5M miles)
Brillouin optical time-domain reflectometry literature
Power
Pump station spacing
1.6km
Stations on 9,000 km
5,625
Cost per station
$195,000
European Hyperloop Centre data
Continuous power per station
15kW
Total corridor pump power
84.4MW
Solar contribution (est.)
20-40%