Rubber Hose
Rubber Hose
I. Basic Definition and Structure
A rubber hose is a flexible pipeline composed of an inner rubber layer, a middle reinforcement layer (e.g., steel wire braided layer), and an outer rubber layer. It is primarily used for conveying fluid media (e.g., hydraulic oil, water, gases, chemicals) and is characterized by bendability, making it suitable for dynamic or complex installation environments12.
Typical Structure:
Inner Rubber Layer: Directly contacts the conveyed medium, with material selection based on medium properties (e.g., oil-resistant, acid/alkali-resistant materials)12.
Middle Layer: Typically steel wire, synthetic fiber, or cotton braiding to enhance compressive and tensile strength16.
Outer Rubber Layer: Protects internal structures and provides wear resistance and weather resistance12.
II. Classification and Application Scenarios
Rubber hoses are categorized by usage into the following types:
Industrial-Grade Rubber Hose
Applicable Media: Water, oil, chemicals, gases (e.g., oxygen, acetylene).
Industry Applications: Petrochemicals, shipbuilding, agricultural irrigation, firefighting.
Performance Requirements: High-pressure resistance (up to 40 Bar), temperature tolerance (-30°C to +120°C), chemical corrosion resistance25.
Specialized Hoses
Water/Irrigation Hoses: Inner layer often uses PVC or EPDM for superior weather resistance.
Chemical Transport Hoses: Inner layer materials require acid/alkali resistance (e.g., NBR, fluororubber).
Food-Grade Hoses: Compliant with hygiene standards, made of NR or synthetic rubber for non-fatty liquids (e.g., milk, beverages)24.
Vibration-Damping Hoses: Incorporate single/multi-ball structures for pipeline shock absorption and displacement compensation, requiring high elasticity and airtightness24.
Special-Function Hoses
Conductive Hoses: Embedded conductive wires to prevent static sparks (e.g., fuel transport).
Vacuum Hoses: Steel wire reinforcement in the middle layer for negative-pressure operations.
III. Core Performance Features
Flexibility and Adaptability: Bendable installation for complex spaces.
Pressure Resistance: Burst pressure up to 120 Bar, wide working pressure range.
Corrosion Resistance: Inner layer materials tailored to media (e.g., NBR for oil, EPDM for high temperatures)26.
Safety: Industrial hoses must pass UV resistance, ozone resistance, and flame-retardant tests.
IV. Materials and Manufacturing Standards
Inner Layer Materials:
NBR (Nitrile Rubber): Excellent oil resistance for fuels and lubricants.
EPDM (Ethylene Propylene Diene Monomer): Heat- and aging-resistant, suitable for hot water/steam24.
PVC (Polyvinyl Chloride): Cost-effective for water and weakly corrosive media.
Manufacturing Standards: Material selection, production, and storage must comply with industry standards (e.g., ISO, DIN)24.
V. Safety and Usage Recommendations
Labeling Requirements: Clearly indicate medium type, pressure rating, and temperature range.
Storage Conditions: Avoid direct sunlight and extreme temperatures to prevent aging.
Regular Inspection: Check for outer layer wear and inner wall cracks; replace promptly
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