Kaxite Sealing manufactures PTFE tubing (Teflon® tubing) in virgin, FEP-lined and convoluted forms for chemical transfer, high-purity fluid handling, electrical insulation and pneumatic lines. We supply bore 1–50 mm, wall 0.5–5 mm, cut to length, coiled, or with SS 304/316 overbraid. Procurement teams choose us for factory-direct pricing, documented material traceability and 7–15 day lead times on bulk orders.
Inert to virtually all industrial acids, bases, solvents and oxidising agents across pH 0–14. Resists every known chemical except molten alkali metals and certain fluorine compounds at extreme conditions.
Continuous service from -200 °C to +260 °C, with short-term peaks up to +300 °C. Suitable for cryogenic LNG lines as well as steam and heat-transfer circuits.
Coefficient of friction around 0.04 — the lowest of any solid material. Minimises pressure drop, prevents product build-up and allows fast, residue-free cleaning between batches.
Dielectric strength around 19.7 kV/mm with a dielectric constant of 2.1 and volume resistivity above 10¹⁸ ohm·cm — widely used as an insulating sleeve and in high-frequency circuits.
Extruded from 100% virgin PTFE resin with no plasticisers or additives. Complies with FDA 21 CFR 177.1550 for food contact and is suitable for pharmaceutical and semiconductor wet processes.
Standard tubing bends to roughly 4–5× outer diameter without kinking. For tight radii or constant flexing we also supply convoluted (corrugated) and heat-set formed tubing that retains its shape.
Extruded from 100% virgin PTFE and supplied in coiled lengths. Service range -200 °C to +260 °C. Chemically inert, low friction and non-toxic — for chemical transfer, pneumatic, insulation, and food and pharmaceutical lines. Custom bore, cut-to-length and SS 304/316 overbraid available.
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Smooth-bore extruded tubing with high dielectric strength and specific gravity 2.13–2.24. Tensile strength 2,500–4,000 PSI (ASTM D638), dielectric constant 2.1 and volume resistivity above 10¹⁸ ohm·cm. Chemically inert across pH 0–14 for chemical transfer, insulating sleeves and semiconductor equipment.
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Available in ram-extruded and paste-extruded forms with OD up to 300 mm. Standard straight lengths 300–1000 mm, longer lengths in coil form. Resists virtually all industrial chemicals across pH 0–14 and operates from -200 °C to +260 °C. End finishes include square cut, chamfered, flared or threaded to drawing.
View specifications| ID mm (inch) | OD mm (inch) | Wall mm | Typical Use |
|---|---|---|---|
| 1.0 (0.039") | 2.0 (0.079") | 0.5 | Instrumentation, medical devices |
| 3.0 (0.118") | 5.0 (0.197") | 1.0 | Lab equipment, analytical systems |
| 6.0 (0.236") | 10.0 (0.394") | 2.0 | Chemical transfer, fluid handling |
| 12.0 (0.472") | 18.0 (0.709") | 3.0 | Industrial process lines |
| 25.0 (0.984") | 32.0 (1.260") | 3.5 | Ducting, agricultural spray lines |
| 50.0 (1.969") | 60.0 (2.362") | 5.0 | Exhaust ducting, large-bore transfer |
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Tensile Strength | ASTM D638 | 25 – 35 | MPa |
| Elongation at Break | ASTM D638 | 300 – 500 | % |
| Durometer Hardness | ASTM D2240 (Shore D) | 50 – 65 | — |
| Linear Expansion Coefficient | ASTM D696 | 12 × 10⁻⁵ | cm/cm/°C |
| Thermal Conductivity | ASTM C177 | 0.25 | W/(m·K) |
| Water Absorption | ASTM D570 | < 0.01 | % |
MOQ negotiable for trial and prototype orders. Free short cut samples of standard bore sizes available for material evaluation.
7–15 days for standard tubing; longer for custom bore, wall, coil length or overbraid. FOB Ningbo / Shanghai, CIF and DDP terms available.
Coiled in PE bags, on reels, or straight in export cartons. Wooden crates available for large-bore pipe and bulk shipments by sea or air.
Inspection report with every shipment. Third-party testing (SGS, TÜV) on request. FDA 21 CFR 177.1550, RoHS and REACH documentation with full traceability.
PTFE tubing offers chemical inertness across pH 0–14, an operating range of -200 °C to +260 °C, an ultra-smooth non-stick bore that minimises pressure drop, and high dielectric strength. It contains no plasticisers, so there is no leaching or contamination risk in food, pharmaceutical or semiconductor service.
Yes. Our tubing is extruded from 100% virgin PTFE resin in controlled conditions to minimise particulate generation. It is widely specified for WFI lines, ultra-pure water systems and chemical distribution in semiconductor fabs. Certificates of material analysis are available on request.
Wall thickness governs pressure containment. 0.5–1 mm is suitable for vacuum and low-pressure instrumentation. 1–3 mm covers most industrial fluid transfer. 3–5 mm and above is used for higher pressures, abrasion or where structural rigidity is required. Our engineers can calculate the required wall from your system pressure, temperature and safety factor.
Standard PTFE tubing is semi-flexible and can bend to roughly 4–5× its outer diameter without kinking. For tight bends or constant flexing we supply convoluted (corrugated) and heat-set formed tubing that retains a fixed shape.
For permanent leak-proof joints, flaring with a ferrule and compression nut (ISO, JIC, NPT) is most common. Push-to-connect fittings suit quick assembly at low pressure. Barbed fittings with clamps work for lower-duty service, and fusion welding creates seamless lengths. Always pair PTFE tubing with compatible fittings in stainless steel, PP or PVDF.
We start with certified virgin PTFE resin, extrude under tightly controlled temperature and speed, then verify every batch with laser micrometer dimension checks, pressure test samples and visual inspection. Full traceability from resin lot to finished tubing is maintained under ISO 9001 principles.
PTFE can be permeated by certain gases (less than most polymers) and tends to cold-flow under sustained mechanical load, so clamp and fitting design must account for creep. It is not suitable for molten alkali metals or fluorine under extreme conditions. Support tubing well and avoid sharp edges or excessive tensile stress.
Yes — customisation is a core service. Beyond standard bore and wall, we produce custom OD/ID combinations, specific cut lengths, coloured stripes for coding, surface printing and special packaging (coils, reels, straight lengths). Send your drawing or specification and we will quote.
Send us your inner diameter, outer diameter, wall thickness, length, quantity or finished-part drawing. Our export team replies within 24 hours and confirms lead time, packaging and documentation before you place a bulk order.
