- Ester/ether-based options
- Very soft to very hard , Shore20A - 98A - 80D.
- Abrasion, chemical and UV resistance
- We offer both high and low-volume production runs!
- Transparent ,black and 30+ stocked color options
INDUSTRIES SERVED: Automotive , Material Handling, Agriculture, Manufacturing & Industrial Machinery
We are the manufacturer of both standard and custom polyurethane tubes（also known as hollow rod）in China since 2004. They are made with high quality thermoset polyurethane by casting and post-curing process, not TPU ( thermoplastic PU) tubing by extruding process.
With many existing molds, we cast solid rods as small as to 5mm diameter up to 600mm and larger, and literally hundreds of O.D. / I.D. tube sizes are also available. We offer quick delivery with competitive pricing. For special size requirements, PEPSEN. has the capability to custom mold a tube to your exact size specifications, with custom designed and built tooling.
Polyurethane tubes are ideal choice for protective roller sleeves for industrial machinery, offering excellent wear resistance. Their shock-absorbing properties make cast urethane tubes effective for vibration isolators and sound dampening applications. PU tubes are also used in hydroforming pads as guide rollers and shock-resistant component.
| Comparison Dimensions | CPU (Cast Polyurethane) Tube | TPU (Thermoplastic Polyurethane) Tubing |
|---|---|---|
| Processing Method | Cast molding; requires 10-12 hours curing post-production | Thermoplastic extrusion/injection; quick |
| Wear Resistance | Excellent (outperforms TPU); ideal for high-friction use | Good; suitable for moderate-friction applications |
| Low-Temperature Performance | Superior flexibility down to -40℃ | Good (polyether-based TPU); may stiffen at -40℃+ |
| Chemical Resistance | Excellent against oils, solvents, and weak chemicals | Good (varies by grade); polyether TPU resists hydrolysis |
| Flexibility & Elasticity | High elasticity; maintains shape under repeated stress | High flexibility; better ductility than CPU |
| Customization Capability | High (custom hardness 10A-80D, dimensions，colors easily) | Moderate (standard grades; custom specs need tooling) |
| Environmental Compatibility | Non-recyclable | recyclable |
| High-Pressure Durability | Excellent (handles up to 20.7MPa); good for hydraulic systems | Good (up to 10MPa); suitable for pneumatic systems |
| Production Lead Time | Longer (curing time + mold prep for custom orders) | Shorter (fast extrusion; quick turnaround for standard sizes) |
| Typical Applications | Heavy machinery, mining slurry lines, hydraulic tubes | Medical devices, food-contact tubes, consumer goods |
- High - Temperature Applications
For high - temperature scenarios like engine parts and heating systems, choose heat - resistant polyurethane tubes. Withstand 160°C short - term. Recommended 70A - 90A hardness, 4 - 10mm wall, polyester - based , NDI, PPDI preferred.
- Low - Temperature Applications
In low - temp settings such as polar regions or cryogenic equipment, pick cold - resistant polyurethane pipes. Retain flexibility at - 50°C. 40A - 60A hardness, polyether - based preferred.
- Chemically Corrosive Applications
For chemically corrosive environments, select suitable polyurethane (ester or polyether) by medium. Increase wall thickness. Regularly check for corrosion.
- Mining Applications
In mining for slurry and tailings transport, use high - wear - resistant polyurethane tubes. 80A - 75D hardness, 6 - 12mm wall, 50 - 200mm ID.
1. Material Selection
- Choose ester-based or ether-based polyurethane based on the type of medium.
- Consider the impact of temperature range and chemical environment on the material.
- Special applications may require special formulations (e.g., high-temperature or hydrolysis-resistant).
2. Performance Matching
- Select hardness based on load and flexibility requirements.
- Dimensional parameters must accurately match installation conditions and system requirements.
- Clearly specify special functions (e.g., antistatic, flame-retardant, or FDA compliance).
3. Application Environment
- Temperature, humidity, and UV exposure can affect material performance.
- Installation conditions and space constraints may influence tube selection.
- Special environments (e.g., high/low temperature or chemical corrosion) need special treatment.
4. Supplier Selection
- Choose experienced polyurethane tube manufacturers.
- Evaluate suppliers' customization capabilities and technical support.
- Verify suppliers' quality control systems and after-sales service.
- Design & Requirement Confirmation
Provide key parameters: application scenario, medium, temperature, pressure.
Define core performance indicators (wear resistance, chemical resistance, hardness).
Specify dimensions: inner diameter, outer diameter, wall thickness, length.
Confirm special requirements (FDA compliance, flame retardancy, antistatic).
- Material Selection & Formula Development
Choose base material (ester-based/ether-based) per needs.
Develop custom formula for specific performance.
Test samples to verify performance.
Adjust formula based on test results.
- Mold Design & Manufacturing
Design custom molds for specified dimensions.
High-precision mold processing (ensure size accuracy, surface finish).
Select mold material (aluminum/steel/others, based on batch size & cost).
Test molds before mass production to confirm size & quality.
- Production & Quality Control
Adopt advanced cast molding (ensure material uniformity, structural integrity).
Strictly control process parameters (temperature, pressure, curing time).
Conduct comprehensive quality tests (size, hardness, performance).
Provide complete quality reports.
- Customization Notes
Minimum order quantity required.
Longer lead time than standard products.
Higher cost than standard products (consider budget).
Provide detailed technical requirements to avoid misunderstandings/rework.
Recommend small-batch trial production before mass production.
Yes. We are manufacturer. Welcome to visit our factory.
Yes. The process includes Share needs → design & quote → prototype (opt) → production → delivery.
We have 10 inspectors to carry out raw material inspection, process control ,first article inspection and final inspection.
We use the ERP system to execute orders, and can check the order status and expected delivery time at any time.
All of products with 3-6 months guarantee (except very frequently wearing parts).
We will response in 24 hours with solutions such as replacement or reworking.
We have dedicated personnel to sort out and maintain molds regularly.
20,000 times for compressions molds and 30,000 time for casting molds
Due to the large quantity of molds, we can keep the molds for free for 2 to 3 years even if no order.
Customers only need to pay mold cost once. We will cover the cost if molds are damaged or reach the lifespan.
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