PTFE Tube

The PTFE tube — also called PTFE tubing — is a hollow cylindrical product made from virgin or filled polytetrafluoroethylene. It combines near-universal chemical resistance, a working temperature range of −190 °C to +260 °C, one of the lowest friction coefficients of any solid material and FDA food-contact approval. This makes it the standard choice for chemical transfer lines, electrical insulation sleeves, food and pharmaceutical transfer, pneumatic and hydraulic lines, laboratory equipment and vibration-damping applications. We supply extruded PTFE tube up to 120 mm outer diameter and isostatically moulded tube up to approximately 3000 mm, in virgin PTFE or filled grades.

01How PTFE Tubes Are Made — Extrusion and Isostatic Moulding

The production method decides the maximum diameter, the maximum length and the dimensional accuracy of the tube. Kaxite uses two processes, chosen by the size you need.

02Key Properties of PTFE That Matter to Your Application

The properties below are what make PTFE tubing the default choice in chemical, food, electrical and equipment applications. Each property is listed with the reason it matters on the shop floor.

• Excellent chemical resistanceNear-universal resistance to acids, alkalis, solvents and oxidisers — the tubing does not corrode, swell or contaminate the medium.
• Working temperature −190 to +260 °CHandles cryogenic service and high-temperature process lines where most other plastics soften or become brittle.
• Greatest resistance to fatigueMeasured on the Wöhler curve — the tube resists repeated flexing and pressure cycles without cracking.
• FDA approvedVirgin PTFE tube is approved for food contact — suitable for food and pharmaceutical transfer lines.
• Flame resistant — UL94V0Self-extinguishing under the UL94V0 standard — important for electrical and equipment applications.
• Non-stick surfaceDeposits and residue do not build up on the bore — the tube stays clean and free-flowing over time.
• Low frictionOne of the lowest friction coefficients of any solid material — ideal for pneumatic and hydraulic lines and for moving parts.
• UV-resistant — does not ageOutdoor service does not degrade the tube — no yellowing, cracking or loss of properties from sunlight.
• Not hygroscopicWater absorption below 0.01% — dimensions and dielectric properties stay stable in humid or wet environments.
• Very good dielectric insulationHigh dielectric strength and low dielectric loss — a standard choice for electrical and electronic insulation sleeves.
• Excellent vibration dampingDamping is effective at both sonic and ultrasonic frequencies — used to isolate vibration in equipment.
• Improves with fillersCarbon, graphite, glass and other additives can improve wear, creep, thermal conductivity and compressive strength.

03Virgin PTFE vs Filled PTFE — Which Tube Do You Need?

Both grades are made from the same base polymer. The difference is the additive, which changes the mechanical and thermal behaviour. Use the table below to match the grade to your application.

04Typical Applications of PTFE Tubing

PTFE tubing is specified where chemical resistance, temperature range and cleanliness matter more than mechanical strength or cost.

• Chemical transfer lines
• Electrical insulation sleeves
• Food and pharmaceutical transfer
• Pneumatic and hydraulic lines
• Laboratory equipment
• Vibration damping in equipment
• Analytical instrument tubing
• Semiconductor wet bench lines
• Fuel and oil lines
• Medical and dental tubing

05Product Images

06How to Order the Correct PTFE Tube

1. Confirm the outer diameter and inner diameter. These fix the wall thickness and decide whether extrusion (up to 120 mm OD) or moulding (larger) is required.
2. Choose virgin or filled PTFE. Virgin for chemical and dielectric service; filled (carbon, graphite or glass) when wear, creep or thermal conductivity matter more.
3. Choose the length. Standard extruded lengths are 1000, 2000 and 3000 mm; moulded lengths are typically 100–300 mm and depend on diameter.
4. Tell us the medium and temperature. This confirms whether virgin or filled PTFE is required and whether FDA approval is needed.
5. Confirm food or electrical requirements. FDA and UL94V0 apply to virgin PTFE tube — confirm before ordering if the tube must carry either approval.

07Why Buy PTFE Tubes from Kaxite

• Direct manufacturer. Ningbo Kaxite Sealing Materials Co., Ltd produces PTFE tube at its own facility in Zhenhai District, Ningbo, Zhejiang, China — factory-direct supply without trading-company mark-up.
• Both extrusion and isostatic moulding in-house. Extruded tube up to 120 mm OD and moulded tube up to approximately 3000 mm, so you do not need two suppliers for a mixed order.
• Virgin and filled grades. Carbon, graphite and glass filled PTFE available alongside virgin PTFE, so you can match the grade to the mechanical demand.
• FDA and UL94V0 verified. Virgin PTFE tube meets FDA food-contact requirements and is flame resistant to UL94V0.
• Traceable materials. Material test certificates can be provided on request so your QA department can verify grade and properties.
• Export packing. Individually wrapped and packed in cases to protect the bore and the outer surface during sea freight.

08Frequently Asked Questions

09Warning

Page reviewed and updated by the Kaxite technical team · Rev. 2026-01 · Ningbo Kaxite Sealing Materials Co., Ltd, No. 432, Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang, China.