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| INNER DIAMETER | Ф4.0mm-Ф200mm |
| COLOUR | The product’s colour is rust red conventionally, some other colours can be customized as the requirements of custom. |
| WORKINGTEMPERATUREE | Continuouslyworking from -75℃-350℃,Instantaneous temperature up to 1600℃ |
| RATE VOLTAGE | 7KV-25KV |
|
CHARACTERISTICS |
Fire proof、 flame retardant、 thermalinsulation, insulation, anti-aging、 molten steel spiling prevented 、 waterproof、grease proofing 、acid and alkali resistant |
| PART NO. | INNER DIAMETER/mm/inch | WALL THICKNESS/mm | ROLL LENGTH/m | |
| ZDFS-S-0410 | 4 | 1/5 | 1 | 100 |
| ZDFS-S-0612 | 6 | 1/4 | 1.2 | 100 |
| ZDFS-S-0813 | 8 | 5/16 | 1.3 | 100 |
| ZDFS-S-1016 | 10 | 3/8 | 1.6 | 20 |
| ZDFS-S-1217 | 12 | 1/2 | 1.7 | 20 |
| ZDFS-S-1521 | 15 | 5/8 | 2.1 | 20 |
| ZDFS-S-2023 | 20 | 3/4 | 2.3 | 20 |
| ZDFS-5-2526 | 25 | 1 | 2.6 | 20 |
| ZDFS-S-3029 | 30 | 11/8 | 2.9 | 20 |
| ZDFS-S-3230 | 32 | 11/4 | 3.0 | 20 |
| ZDFS-S-3531 | 35 | 13/8 | 3.1 | 20 |
| ZDFS-S-3833 | 38 | 11/2 | 3.3 | 20 |
| ZDFS-S-4034 | 40 | 15/8 | 3.4 | 20 |
| ZDFS-S-4535 | 45 | 13/4 | 3.5 | 20 |
| ZDFS-S-5037 | 50 | 2 | 3.7 | 20 |
| ZDFS-S-5539 | 55 | 21/4 | 3.9 | 20 |
| ZDFS-S-6040 | 60 | 23/8 | 4.0 | 20 |
| ZDFS-S-6541 | 65 | 21/2 | 4.1 | 20 |
| ZDFS-S-7043 | 70 | 23/4 | 4.3 | 20 |
| ZDFS-S-7544 | 75 | 3.0 | 4.4 | 20 |
| ZDFS-S-8047 | 80 | 31/8 | 4.7 | 15 |
| ZDFS-S-8548 | 85 | 31/4 | 4.8 | 15 |
| ZDFS-S-9050 | 90 | 31/2 | 5.0 | 15 |
| ZDFS-S-9552 | 95 | 33/4 | 5.2 | 15 |
| ZDFS-S-10056 | 100 | 4 | 5.6 | 15 |
| ZDFS-S-11057 | 110 | 43/8 | 5.7 | 15 |
| ZDFS-S-12058 | 120 | 43/4 | 5.8 | 15 |
| ZDFS-S-13060 | 130 | 51/8 | 6.0 | 15 |
| ZDFS-S-14062 | 140 | 51/2 | 6.2 | 15 |
| ZDFS-S-15068 | 150 | 6 | 6.8 | 15 |
Product Introduction
This fire retardant sleeve is manufactured from alkali-free glass fiber or high-bulk fiber woven into a tubular structure, then coated with iron oxide red silicone rubber. The sleeve undergoes a high-temperature treatment process to cure the silicone coating. The sleeve provides protection against molten metal splashes, open flames, and radiant heat sources. The material maintains thermal insulation performance across a wide temperature range, reducing heat transfer from external sources to protected hoses and cables. The dielectric properties of the silicone coating provide electrical insulation, reducing the risk of current conduction through the sleeve material. The sleeve resists exposure to acids, alkalis, and other corrosive media without significant degradation or deformation.
Core Advantages
Molten Metal Splash Resistance
The silicone-coated glass fiber construction withstands direct exposure to molten metal splashes, preventing damage to underlying hoses and cables.
Thermal Insulation Performance
The sleeve reduces heat transfer from external sources, maintaining lower surface temperatures on protected components and reducing energy loss.
Electrical Insulation Properties
The silicone coating provides dielectric isolation, preventing current transfer between electrical lines and reducing electrical fault risks.
Chemical Resistance
The sleeve resists degradation from acids, alkalis, oils, and solvents, maintaining material properties in chemically aggressive environments.
High Temperature Stability
The sleeve maintains structural integrity under continuous high-temperature exposure without melting, dripping, or becoming brittle.
Flexible Installation
The woven construction allows the sleeve to bend around curves and fittings, conforming to the shape of protected hoses and cables.
Product Features
Core material Alkali-free glass fiber or high-bulk fiber woven into a tubular construction. Fiber diameter: 7-9 micrometers. Continuous operating temperature: 550°C.
Coating material Iron oxide red silicone rubber applied via dip-coating process. Coating thickness: 0.5-1.0mm. Provides additional thermal protection up to 260°C continuous.
Temperature rating Continuous service: 260°C (coated), 550°C (fiber only). Intermittent exposure: up to 1100°C for short durations. Molten metal splash resistance tested.
Dielectric strength The silicone coating provides dielectric strength of 10-15 kV/mm, depending on coating thickness. Prevents electrical arcing through the sleeve.
Chemical resistance Resistant to mineral oils, hydraulic fluids, diesel, gasoline, dilute acids, and alkalis. Not recommended for continuous exposure to concentrated strong acids.
Dimensions available Inner diameter range: 6mm to 150mm. Standard lengths: 10m, 20m, 50m rolls. Custom lengths available upon request.
Technical Specifications
| Parameter | Specification |
|---|---|
| Continuous operating temperature | -50°C to +260°C (coated), -50°C to +550°C (fiber only) |
| Intermittent temperature resistance | Up to 1100°C for 15-30 seconds |
| Molten metal splash protection | Withstands direct contact with molten aluminum, copper, and steel |
| Dielectric strength | 10-15 kV/mm (ASTM D149) |
| Thermal conductivity | 0.15-0.20 W/m·K at 200°C |
| Flame resistance | UL VW-1, self-extinguishing within 5 seconds |
| Tensile strength (glass fiber) | > 1000 N per 25mm width |
| Elongation at break | < 5% |
| Available inner diameters | 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 125mm, 150mm |
| Standard length | 10m, 20m, 50m rolls |
| Color | Iron oxide red (standard), other colors available upon request |
Application Scenarios
Steel mills and foundries
Smelters and metal processing
Glass manufacturing plants
Rail transit and rolling stock
Large power transformers
Hydraulic hose protection
Electrical cable protection
Corrugated and metal pipes
This fire retardant sleeve is suitable for high-temperature and harsh industrial environments including steel mills, smelters, glass factories, and foundries. Applications include protection of hydraulic hoses near furnaces and molten metal handling equipment, electrical cables in high-ambient-temperature areas, metal hoses and corrugated pipes in exhaust and heating systems, and equipment in rail transit vehicles where fire safety is required. The sleeve also applies to large transformer sites where oil-filled cables require fire and thermal protection. The combination of thermal insulation, flame resistance, and electrical insulation makes the sleeve suitable for systems where multiple hazards exist simultaneously.
Common Questions and Solutions
What is the difference between alkali-free glass fiber and high-bulk fiber?
Alkali-free glass fiber (E-glass) offers higher tensile strength and continuous temperature resistance up to 550°C. High-bulk fiber has a thicker, softer construction providing better thermal insulation but slightly lower continuous temperature rating. Select based on mechanical stress and temperature requirements of the application.
Can the sleeve be installed over existing hoses without disconnection?
The sleeve is a tubular construction and must be slid over the end of the hose or cable. For applications where disconnection is not possible, a wrap-style sleeve with Velcro or lacing cord closure is available. Specify wrap-style when ordering for retrofit applications.
How does the sleeve perform in the presence of hydraulic oil or fuel?
The silicone coating resists degradation from mineral oils, hydraulic fluids, diesel, and gasoline. Extended exposure may cause surface softening but does not compromise the glass fiber core. For continuous oil immersion applications, a fluorosilicone-coated sleeve is recommended.
What is the shelf life of the fire retardant sleeve?
When stored in a cool, dry environment away from direct UV exposure, the sleeve has a shelf life of 5 years. The silicone coating may stiffen after extended storage at high temperatures. Rotate stock to ensure optimal installation flexibility.
Does the sleeve produce smoke or toxic fumes when exposed to fire?
The silicone coating produces minimal smoke and does not release halogenated gases. Combustion products include carbon dioxide, water vapor, and silica dust. The sleeve is suitable for applications where low smoke emission is required.
How should the sleeve be cut to length?
Cut the sleeve using sharp scissors or a utility knife. For glass fiber versions, seal the cut edge with high-temperature silicone sealant to prevent fraying. For high-bulk fiber versions, melt the cut edge with a hot knife to seal the fibers.
Installation Considerations
Measure the outer diameter of the hose, cable, or pipe before selecting sleeve size. Choose sleeve inner diameter 10-20% larger than the component outer diameter for easy installation without excessive compression.
For installations requiring removal or replacement, cut the sleeve 5-10cm longer than the protected area to allow for thermal expansion and contraction of the underlying component.
Secure the sleeve at both ends using stainless steel tie wraps, hose clamps, or high-temperature tape. Do not use plastic zip ties as they will melt under high-temperature conditions.
For applications with sharp bends, avoid kinking the sleeve. If the bend radius is less than 3 times the sleeve diameter, use multiple shorter sleeve sections with overlap at the bend.
Do not install the sleeve over wet or oil-soaked surfaces. Clean and dry the underlying component before installation to prevent trapped moisture from vaporizing and damaging the coating.
Inspect the sleeve periodically for visible damage such as cuts, abrasion, or coating separation. Replace the sleeve if the glass fiber core is exposed or if the silicone coating shows signs of cracking or melting.
