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.