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Help CenterPA66 Nylon Sleeve for Railway Sleepers, Tensile Strength 60 MPa, Heat Resistant to 200°C
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Welcome to Anping County Boli Hardware Wiremesh Products Factory – a trusted manufacturer since 1998, specializing in railway infrastructure components. Our PA66 Nylon Sleeve for Railway Sleepers is engineered to provide superior protection and longevity for wooden, concrete, or composite sleepers. With a tensile strength of 60 MPa and heat resistance up to 200°C, this sleeve ensures reliable performance under extreme track conditions, reducing maintenance costs and extending service life.
Key Features & Benefits
- High Mechanical Strength: Tensile strength of 60 MPa (tested per ASTM D638) ensures the sleeve withstands heavy loads and dynamic stresses from passing trains, preventing cracking or deformation.
- Exceptional Heat Resistance: Rated for continuous operation up to 200°C, making it suitable for regions with high ambient temperatures or near braking systems.
- Chemical & UV Resistance: PA66 nylon offers excellent resistance to oils, greases, salts, and UV radiation, ideal for outdoor railway environments.
- Customizable Dimensions: Available in various inner diameters (e.g., 20–80 mm), wall thicknesses (2–10 mm), and lengths (up to 3 meters) to fit different sleeper designs and installation requirements.
- Easy Installation: Lightweight and flexible yet rigid enough to slide onto sleepers without special tools. Can be cut on-site if needed.
- Electrical Insulation: PA66 provides excellent dielectric properties, helping to prevent electrical leakage and signal interference in electrified railways.
- Cost-Effective: Reduces sleeper replacement frequency, lowering lifecycle costs for railway operators.
Technical Specifications
| Property | Value |
| Material | PA66 (Nylon 66) |
| Tensile Strength | 60 MPa (ASTM D638) |
| Heat Resistance (Continuous) | 200°C |
| Melting Point | 260°C (approx.) |
| Density | 1.14 g/cm³ |
| Water Absorption (24h, 23°C) | 1.2% (low) |
| Color | Black (standard) / Custom colors available |
| Sizes (Customizable) | ID: 20–80 mm, Wall: 2–10 mm, Length: up to 3000 mm |
Why Choose Boli for Your Railway Sleeves?
Since 1998, we have been a reliable manufacturer of industrial hardware, exporting US$5–10 million annually to markets including North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our sleeves are widely used in mainline railways, metro systems, and mining railroads. With flexible shipping from ports like Tianjin, Qingdao, Shanghai, and Foshan, we ensure timely delivery. We are committed to quality control, using only prime-grade PA66 resin. Each batch is tested for tensile strength and heat resistance before shipment.
Frequently Asked Questions (FAQ)
Q1: What is PA66 nylon sleeve used for in railways?
A: It is placed over railway sleepers (ties) to protect them from abrasion, moisture, and chemical damage, and to provide electrical insulation. It also helps secure rail fastening systems.
Q2: Can the sleeve withstand direct sunlight and rain?
A: Yes, PA66 has excellent UV resistance and low water absorption, making it suitable for outdoor exposed environments without significant degradation.
Q3: What is the maximum temperature this sleeve can handle?
A: The sleeve can operate continuously at up to 200°C, with a short-term peak of 230°C. It is ideal for hot climates or near friction points.
Q4: Do you offer custom lengths and diameters?
A: Absolutely. We can produce sleeves in any length up to 3 meters, with inner diameters from 20 to 80 mm and wall thicknesses from 2 to 10 mm. Please provide your specifications.
Q5: Is the sleeve easy to install on existing sleepers?
A: Yes, the sleeve is designed to slide onto the sleeper end. For retrofitting, you can cut the sleeve lengthwise and wrap it around the sleeper, then secure with adhesive or clamping (optional).
Q6: Does the sleeve have any flame retardant properties?
A: PA66 is inherently self-extinguishing (UL94 V-2). For stricter fire ratings, we can add flame retardant additives upon request – please inquire.
Q7: What is the minimum order quantity (MOQ)?
A: MOQ is typically 1000 pieces per size, but we can discuss smaller trial orders for first-time customers.
Q8: How do you package the sleeves for export?
A: Sleeves are packed in bundles, wrapped with waterproof film, and placed in export-grade cartons or wooden pallets as per your requirement. We can also provide custom packaging with your logo.
Contact us today for a quote or sample! With our extensive experience, competitive pricing, and global logistics network, we are ready to support your railway projects. Let us help you enhance the durability and safety of your tracks.
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