1. Structure & Materials

• Core Components:
  • Bellows Layer: 304/316L stainless steel (corrugated structure), pitch 8-12mm, wall thickness 0.3-0.5mm, providing flexibility and pressure resistance.
  • Reinforcement Layer: Braided stainless steel wire mesh (coverage ≥95%), enhancing tensile strength and preventing burst under pressure.
  • End Fittings: Flanged (ANSI 150LB/PN10) or threaded (NPT/BSPT), material Q235 carbon steel or 304 stainless steel, compatible with pipeline standards.
• Specialized Types:
  • High-temperature type: Inconel 625 alloy bellows for ≤650℃ applications (e.g., furnace exhaust pipes).
  • Anti-corrosion type: PTFE-lined inner layer for strong acids/alkalis (e.g., chemical plating lines).

2. Technical Parameters

• Nominal Diameter: DN100 (4 inches), inner diameter 101.6mm, outer diameter 114.3mm (with braiding).
• Working Pressure:
  • Standard: 1.6MPa (16kgf/cm²) at 20℃;
  • High-pressure: 2.5MPa (customizable, requires thicker bellows).
• Temperature Range:
  • 304 stainless steel: -20℃~400℃;
  • 316L: -60℃~600℃ (with heat-resistant braiding).
• Flexibility Index:
  • Minimum bending radius: 150-200mm (≤2×DN for smooth bending);
  • Axial displacement: ±8mm, lateral displacement: ±10mm, angular deflection: ≤12°.

3. Key Features

• Vibration Isolation: Absorbs mechanical vibrations from pumps/compressors, reducing noise by 10-20dB (e.g., in generator set pipelines).
• Thermal Expansion Compensation: Adapts to pipeline length changes due to temperature fluctuations (e.g., steam pipes with 50℃ temperature difference, compensation capacity 5-8mm/m).
• Corrosion Resistance: Stainless steel construction suitable for seawater, salt spray, and mildly corrosive media (316L recommended for chloride environments).
• Anti-torsion Design: Braided mesh prevents hose twisting during installation, maintaining structural integrity under dynamic loads.

4. Application Scenarios

• Industrial Pipelines:
  • Chemical: Acid/alkali transport, solvent pipelines (PTFE-lined type for HF acid).
  • Power: Boiler feedwater, steam exhaust, gas turbine connections.
• Mechanical Equipment:
  • CNC machine tool oil/gas lines, hydraulic press flexible connections, vibration-damping hoses for printing presses.
• Building Engineering:
  • High-rise building fire sprinkler systems (anti-seismic), HVAC refrigerant pipes (R410A compatible).
• Marine/Oil & Gas:
  • Ship engine exhaust hoses (heat-resistant Inconel), offshore platform corrosive medium transport.

5. Installation & Maintenance

• Installation Notes:
  • Avoid over-bending: Maintain bending radius ≥2×DN to prevent bellows flattening (reduces flow area by ≥15% if bent excessively).
  • Axial alignment: Do not use the hose to compensate for large installation offsets; misalignment >3° may cause uneven stress.
  • Supporting fixtures: Install brackets every 1.5-2m for horizontal runs to prevent sagging under weight.
• Maintenance Tips:
  • Annual inspection: Check for braid damage (wire breakage >5% requires replacement), bellows corrosion pits (depth >0.1mm).
  • Cleaning: Flush with deionized water for food-grade applications; use solvent cleaning for oil-contaminated hoses.
  • Storage: Keep in dry environments, avoid contact with sharp objects; cover ends with plastic caps to prevent dust ingress.

6. Customization Options

• Length & Bend:
  • Standard lengths: 500-3000mm; custom lengths up to 10m (with intermediate supports).
  • Pre-formed bends: 45°/90° elbow types for space-constrained installations.
• Special Functions:
  • Vacuum resistance: Double-layer bellows for -0.1MPa vacuum systems (e.g., distillation columns).
  • Electrical conductivity: Grounding wires embedded in braiding to prevent static buildup (flammable media).
• Certifications:
  • Food grade: Compliance with FDA 21 CFR 177.2600 (316L + passivated inner surface).
  • Explosion-proof: ATEX/IECEx certification for hazardous areas (ATEX Zone 1/21).

7. Comparison with Rubber Hoses

Standards Compliance

• ISO 10380:2012 Flexible metal hoses for industrial applications
• GB/T 14525-2010 Metallic hose for pipeline
• MSS SP-83 Threaded pipe couplings for pressure applications