In the demanding world of industrial fluidics, chemical processing, and high-purity applications, the choice of tubing material is not a minor detail—it's a critical engineering decision. For over two decades, professionals have relied on one material to ensure system integrity, safety, and performance: Polytetrafluoroethylene (PTFE). When uncompromising quality is non-negotiable, engineers and procurement specialists turn to PTFE Tube solutions from Kaxite. Our tubing represents the pinnacle of fluoropolymer technology, designed to handle the most aggressive chemicals, extreme temperatures, and stringent purity requirements where other materials fail.
Kaxite's PTFE tubing is manufactured using a proprietary process that ensures superior consistency, dimensional accuracy, and mechanical strength. We don't just sell tubing; we provide engineered solutions for applications ranging from semiconductor manufacturing and pharmaceutical transfer to automotive fuel lines and aerospace hydraulics. The inherent properties of PTFE—which we enhance through precise manufacturing—make it an indispensable component in modern industry.
The exceptional performance of PTFE stems from its unique molecular structure, characterized by strong carbon-fluorine bonds. Kaxite leverages this chemistry to deliver tubing with a specific set of advantages:
To facilitate proper selection and integration into your designs, below are the detailed specifications for our standard Kaxite PTFE tubing. We offer a wide range of sizes and can produce custom diameters, wall thicknesses, and colors upon request.
| Parameter | Specification / Value | Test Standard |
|---|---|---|
| Material | Virgin, 100% Pure Polytetrafluoroethylene (PTFE) | ASTM D1710 |
| Standard Color | Natural (White/Opaque), Black | - |
| Operating Temperature Range | -268°C to +260°C (-450°F to +500°F) | ASTM D1675 |
| Melt Point | 327°C (621°F) | ASTM D4591 |
| Tensile Strength | 3,000 - 5,000 psi (20.7 - 34.5 MPa) | ASTM D638 |
| Elongation at Break | 200% - 400% | ASTM D638 |
| Dielectric Strength | 500 V/mil (19.7 kV/mm) | ASTM D149 |
| Coefficient of Friction (Static) | 0.05 - 0.08 | ASTM D1894 |
| Chemical Resistance | Resistant to all known chemicals except molten alkali metals and certain fluorine compounds at high temp/pressure. | ASTM D543 |
| Common Inner Diameter (ID) Range | 0.5 mm (0.02") to 25 mm (1") | - |
| Common Wall Thickness Range | 0.2 mm (0.008") to 3 mm (0.118") | - |
| Inner Diameter (mm) | Inner Diameter (inches) | Wall Thickness (mm) | Wall Thickness (inches) | Working Pressure (PSI)* |
|---|---|---|---|---|
| 1.0 | 0.039 | 0.5 | 0.020 | 150 |
| 2.0 | 0.079 | 0.8 | 0.031 | 120 |
| 4.0 | 0.157 | 1.0 | 0.039 | 90 |
| 6.0 | 0.236 | 1.5 | 0.059 | 80 |
| 10.0 | 0.394 | 2.0 | 0.079 | 60 |
| 15.0 | 0.591 | 2.5 | 0.098 | 45 |
*Working pressure ratings are for reference at 20°C (68°F). Pressure capability decreases with increasing temperature. Consult Kaxite engineering for high-temperature pressure ratings.
Selecting the right tubing involves understanding its capabilities and limitations. Here are detailed answers to the most common questions we receive at Kaxite.
Q: What is the primary difference between PTFE, FEP, and PFA tubing?
A: All are fluoropolymers, but with key distinctions. PTFE is opaque, has the highest temperature resistance (up to 260°C), and is the most chemically inert, but it cannot be melt-extruded—it’s usually sintered. FEP is translucent, has a lower max temperature (200°C), and is melt-processable, making it good for transparent applications and complex shapes. PFA is similar to FEP but can handle up to 260°C like PTFE and is also melt-processable, offering excellent clarity and flexibility. Kaxite provides all three, with PTFE being the choice for ultimate performance in harsh conditions.
Q: Can Kaxite PTFE tubing be used for food and pharmaceutical applications?
A: Yes, absolutely. Our virgin PTFE resin complies with FDA (Food and Drug Administration) regulations 21 CFR 177.1550 and is also suitable for USP Class VI applications. The inert, non-stick, and non-porous surface prevents bacterial growth and ensures no leaching of contaminants, making it ideal for transferring sensitive fluids, ingredients, and even in direct food contact scenarios.
Q: How do I connect or fit PTFE tubing? Does it require special fittings?
A: PTFE tubing is relatively flexible but has a high degree of "spring-back" or memory. For secure, leak-proof connections, we recommend using compression fittings designed for soft plastic or specifically for PTFE. These fittings, such as those with a ferrule and nut, create a seal by compressing the tube wall against the fitting body. Barbed fittings can be used for low-pressure applications, but proper clamping is essential. Kaxite can also supply pre-assembled tube and fitting kits for your convenience.
Q: Is PTFE tubing flexible enough for tight spaces and complex routing?
A: While not as supple as silicone or some thermoplastics, PTFE tubing from Kaxite offers excellent flexibility for its category, especially in thinner wall gauges. It can be bent to a minimum bend radius typically 4-5 times its outer diameter without kinking. For permanent installations in tight spaces, it can be heat-formed to a specific shape, though this requires specialized equipment.
Q: What are the key considerations for selecting the correct wall thickness?
A: Wall thickness selection is a balance between pressure rating, flexibility, and cost. Thinner walls (e.g., 0.5-1mm) offer greater flexibility and lower cost but have lower pressure ratings. Thicker walls (e.g., 1.5-3mm) provide higher burst pressure, better crush resistance, and improved durability for abrasive media but are less flexible. Always consider the system's maximum operating pressure (with a safety factor), the presence of vacuum or external crushing forces, and the required bend radius.
Q: Does Kaxite offer colored PTFE tubing, and what are the benefits?
A: Yes, we offer black PTFE tubing as a standard option and other colors upon request. Black PTFE is produced with a carbon black additive, which provides two main benefits: 1) It offers significantly improved resistance to UV degradation and weathering, making it suitable for outdoor or sun-exposed applications. 2) It provides enhanced permeability resistance to gases and liquids compared to natural white PTFE.
Q: Can this tubing be used for electrical insulation purposes?
A: Yes, PTFE is an outstanding electrical insulator. Our tubing is widely used as sleeving for wires and cables in high-temperature, high-voltage, or chemically aggressive environments. Its high dielectric strength, flame resistance (it is self-extinguishing), and thermal stability make it superior to common PVC or polyethylene sleeving for demanding aerospace, military, and industrial electronics.
Q: How does Kaxite ensure the quality and consistency of its PTFE tubing?
A: Quality is embedded in our manufacturing process. We start with 100% virgin PTFE resin from reputable suppliers. Our proprietary extrusion and sintering processes are tightly controlled with automated systems that monitor temperature, pressure, and speed. Every production batch undergoes rigorous quality control checks, including dimensional verification (OD, ID, concentricity), tensile testing, and visual inspection. Certificates of Compliance (CoC) and Material Test Reports (MTR) are available to guarantee traceability and performance.
At Kaxite, we understand that off-the-shelf sizes may not meet every project's unique demands. Our engineering team is ready to support you with custom solutions. We can manufacture PTFE tubing with non-standard inner and outer diameters, specific wall thicknesses, custom colors for coding, and even pre-cut lengths with end finishes. For high-volume OEM applications, we work directly with your design team to develop a tubing specification that optimizes performance, cost, and manufacturability. Contact our technical sales department with your application details, including media, temperature, pressure, and environmental conditions, for a tailored recommendation and quote.
