Metal hoses are flexible pipes made of metal, typically used for transporting fluids (such as gases and liquids) or protecting cables, pipelines, etc. It combines the strength and flexibility of metal and is suitable for complex environments or occasions where bending is required.
1. Structure and Materials
Structure
Inner layer: Stainless steel (such as 304, 316), galvanized steel, copper, etc., corrosion-resistant and adaptable to different media.
Middle layer: Metal bellows (spiral or annular bellows), providing flexibility and pressure resistance.
Outer layer: It may be covered with PVC or woven mesh (stainless steel wire or galvanized steel wire) to enhance wear resistance and tensile strength.
Common materials
Stainless steel (most commonly used) : Resistant to high temperatures and corrosion, suitable for the chemical and food industries.
Galvanized carbon steel: Low cost, used in general industry.
2. Main features
Flexibility: It can be bent and twisted, adapting to complex wiring or mobile devices.
Pressure resistance: Capable of withstanding relatively high pressure (depending on the material and structure).
Temperature resistance range: -200°C to +600°C (Stainless steel performs exceptionally well).
Corrosion resistance: Especially made of stainless steel, it is suitable for damp and chemical environments.
Shielding performance: The metal braided layer can resist electromagnetic interference (EMI) and protect the cable signal.
3. Application fields
Industrial field
Transporting steam, oil and chemicals (such as petrochemical and pharmaceutical pipelines).
Hydraulic and pneumatic systems in mechanical equipment.
Architecture and Municipal Engineering
Flexible connection of gas pipelines and water supply systems.
Fire sprinkler system.
4. Key points for selection
Medium compatibility: Ensure that the material does not undergo chemical reactions with the conveyed fluid/gas.
Pressure and temperature: Select the pressure resistance grade and temperature range based on the working conditions.
Bending radius: It must be greater than the minimum bending radius of the hose to avoid damage.
Protective requirements: Whether anti-static, flame-retardant or additional shielding layers are needed.
5. Installation and Maintenance
Installation
Avoid excessive bending or twisting to prevent metal fatigue.
Use dedicated joints (such as flanges and clamps) to ensure sealing.
Maintenance
Regularly inspect for wear, corrosion or leakage.
Avoid contact with sharp objects or long-term exposure to strong acids/strong alkalis.