Engineering High-Precision Small-Diameter Plastic Tubing
Keli manufactures high-precision small-diameter plastic tubing from engineering resins such as POM, PBT, PA6, PA66, and PA12. Produced through precision extrusion, the tubing provides high mechanical strength, heat and chemical resistance, and stable dimensions for demanding applications. It is suitable for automotive, aerospace, precision instruments, interventional medical devices, and high-temperature fluid handling systems. Custom inner diameter, outer diameter, wall thickness, length, color, and material options are available to meet specific OEM and application requirements.
Materials for Engineering Plastic Tubing
Different engineering plastics provide different combinations of strength, temperature resistance, chemical resistance, dimensional stability, and flexibility. Keli selects and processes suitable materials according to the required tubing performance, application environment, and dimensional requirements. Common material options for high-precision small-diameter plastic tubing include POM, PBT, PA6, PA66, and PA12. Depending on application requirements, these materials can also be modified with options such as glass-fiber reinforcement, antistatic, flame-retardant, or radiation-resistant additives to achieve specific performance requirements.
POM Flaring & Flanging Tube
PBT Plastic Tube
PA6 Plastic Tube
PA66 Flaring & Flanging Tube
Material / Core Advantages / Key Applications
| Material | Core Advantages | Key Applications |
| POM (Polyoxymethylene) | High mechanical strength, low friction, excellent wear resistance, and good dimensional stability | Gear transmission sleeves, pneumatic control tubes, precision instrument bearing sheaths |
| PBT (Polybutylene Terephthalate) | Good dimensional stability, electrical insulation, heat resistance, and chemical resistance | Electronic transformer insulation tubes, connector sheaths, fiber optic protective tubes |
| PA6 (Nylon 6) | High strength, good wear resistance, toughness, and resistance to oils and many chemicals | Wear-resistant protective sleeves, mechanical wire-routing tubes, automotive interior tubes |
| PA66 (Nylon 66) | Higher strength and heat resistance than PA6, with good wear resistance and dimensional stability | High-pressure oil pipe sheaths, mechanical structural support tubes, precision bearing cages |
| PA12 (Nylon 12) | Extremely low moisture absorption, good low-temperature toughness, flexibility, and fuel resistance | Automotive fuel delivery tubes, pneumatic brake lines, high-precision hydraulic conduits |
The material can be selected based on temperature, chemical exposure, mechanical load, flexibility, moisture conditions, and the dimensional requirements of the final application. For OEM projects, Keli can provide material and tubing specifications according to customer drawings or application requirements. Keli also manufactures high-precision PTFE tubing for applications requiring low friction, chemical resistance, and high temperature performance.
Precision Extrusion Technology for Engineering Plastic Tubing
Keli uses precision extrusion and in-process quality control to manufacture high-precision small-diameter engineering plastic tubing with consistent dimensions and stable performance. Our production process combines extrusion control, shrinkage management, inspection, functional customization, and full production traceability.
Engineering Plastic Tubing Key Advantages
High Dimensional Stability
Compared to conventional soft plastics, engineering plastics exhibit lower moisture absorption (especially PBT and PA12), maintaining stable diameters in complex environments to ensure consistent fluid flow rates.
Temperature & Chemical Resistance
Excellent thermal stability, maintaining toughness under long-term operating temperatures (typically -40°C to +120°C, depending on material), while resisting various oils, solvents, and chemicals.
Lightweight & Eco-Friendly
With a density about 1/5 that of metals, they significantly reduce overall product weight and are recyclable.
Customizable Manufacturing
Keli provides custom precision extrusion based on application requirements, including ID, OD, wall thickness, length, color, and material selection.
Custom Engineering Plastic Small-Diameter Tubing
Keli provides custom precision extrusion solutions for high-precision small-diameter engineering plastic tubing based on your material, dimensions, and application requirements. We can customize the tubing structure and specifications to meet specific performance and assembly needs.
Custom options include:
- Material: POM, PBT, PA6, PA66, PA12, and selected modified grades
- Dimensions: Custom ID, OD, wall thickness, length, and tolerances
- Material Modification: Glass-fiber reinforcement, antistatic, flame-retardant, or radiation-resistant options
- Appearance: Custom colors and surface requirements
- Application Requirements: Material selection and tubing design based on operating temperature, chemical exposure, flexibility, and mechanical requirements
- Production & Packaging: Customized production quantities and packaging requirements
Send your drawing, dimensions, or application requirements to Keli for material selection and custom tubing development.
Need Custom Small-Diameter Engineering Plastic Tubing?
Share your drawing, material preference, dimensions, or application requirements with Keli. Our team can help select the suitable engineering plastic and develop a precision-extruded tubing solution for your project.