Clear Teflon FEP Tubing
Model:KXTFEP1125
KXTFEP1125 is a high-clarity fluorinated ethylene propylene (FEP) tubing engineered for fluid systems where visual monitoring is non-negotiable. It transmits 96% of UV light, meets FDA 21 CFR 177.1550 for food contact, and maintains chemical inertness from −200 °C to +205 °C. Standard metric sizes from 2×1.6 mm to 12×10 mm, with custom coils and cut lengths available. Send your media, operating pressure, and connection type for a same-week factory quote.
Clear FEP Tubing for Semiconductor, Medical & Chemical Fluid Monitoring
KXTFEP1125 is specified when the process fluid must be seen, not just contained. This clear FEP tubing transmits 96% of UV light, meets FDA 21 CFR 177.1550 for food and pharmaceutical contact, and remains chemically inert to acids, bases, and organic solvents across a −200 °C to +205 °C service range. Where PFA tubing prioritises thermal headroom and PTFE tubing prioritises maximum chemical resistance, FEP tubing delivers the clarity that sight-glass, capillary, and trace-analysis systems require. Compare the full fluoropolymer range via PTFE Tube and PFA Flexible Tubing.
96%UV transmission
FDA 21 CFR 177.1550Food & pharma contact
−200 → +205 °CContinuous service
UL 94 V-0Flame rating
Technical Data Sheet — KXTFEP1125
| Property | Value | Unit / Method |
|---|---|---|
| Mechanical Properties | ||
| Tensile Strength at 23 °C | 14.5–21 | MPa |
| Elongation at Break, 23 °C | 240–300 | % |
| Flexural Strength | No break at flexure | D790 |
| Impact Strength | No break | — |
| Yield Strength at 23 °C | 12 | MPa |
| Density | 2.15–2.17 | g/cm³ |
| Durometer Hardness | 55–58 | Shore D / ASTM D2240 |
| Thermal Properties | ||
| Coefficient of Linear Expansion, 20–100 °C | 12 × 10⁻⁵ | K⁻¹ / D696 |
| Melting Point | 253–282 | °C |
| Thermal Conductivity | 0.209 | W/m·K |
| Service Temperature | −200 to +205 | °C |
| Processing Temperature | 370–395 | °C |
| Electrical Properties | ||
| Surface Arc-Resistance | >300 (does not track) | sec / D495 |
| Volume Resistivity (dry, 50% RH) | >10¹⁸ | ohm·cm / D257 |
| Surface Resistivity (100% RH) | >10¹⁶ | ohm/sq / D257 |
| Dielectric Constant (60 Hz–1 MHz) | 2.1 | ε / D150-81 |
| Dielectric Strength | 13–100 | kV/mm / D149 |
| Dissipation Factor (60 Hz–1 MHz) | <0.0001 | — / D150-81 |
| Other Properties | ||
| Refractive Index | 1.344 | nD 25 / D524 |
| Water Absorption | <0.01 | % / D570-81 |
| Flame Rating | V-0 | UL-94 |
| Limiting Oxygen Index | 95 | % O₂ / D2863 |
| Specific Gravity | 2.1–2.3 | D792-66 (1979) |
| Coefficient of Friction | 0.27–0.67 | D1894 |
Values are typical, not specification limits. Request a batch-specific certificate of analysis with your order.
Where Clear FEP Tubing Is Specified
Semiconductor Wet Processing
Acid, solvent, and CMP slurry delivery lines where operators need to confirm flow and detect bubbles without breaking containment.
Medical & Pharmaceutical Capillary Lines
Infusion, sampling, and fill-line tubing requiring FDA-compliant wetted material and visible verification of media integrity.
Chromatography & Trace Analysis
HPLC, ICP-MS, and ion chromatography flow paths where low extractables and UV transparency support baseline stability and contamination detection.
Chemical Process Sight-Glass Replacement
Corrosive acid and solvent transfer where glass sight glasses create breakage risk; FEP provides clarity with chemical inertness and flexibility.
FEP vs PTFE vs PFA — Selection Guidance for Procurement
FEP (KXTFEP1125)Best clarity and UV transmission; FDA compliant; −200 to +205 °C. Choose when visual monitoring and chemical inertness are both required.
PTFEBroadest temperature range (up to +260 °C) and maximum chemical resistance, but opaque and less flexible. See PTFE Tube.
PFAHigher thermal ceiling and 10× FEP flex life, with better clarity than PTFE but lower UV transmission than FEP. See PFA Flexible Tubing.
Procurement FAQ
What documentation is supplied with a clear FEP tubing order?
Production orders include a batch-level certificate of analysis covering tensile strength, elongation, density, and dimensional tolerances. FDA 21 CFR 177.1550 compliance documentation is available on request. Use the Send Inquiry form to specify documentation requirements.
Can Kaxite supply cut-to-length or custom-coil clear FEP tubing?
Yes. Standard metric sizes from 2×1.6 mm to 12×10 mm are held in stock; custom coil lengths, cut pieces, and tolerance windows are produced to order. For related fluoropolymer semi-finished shapes, see PTFE Products and PTFE Rods.
What is the lead time for a production quantity of clear FEP tubing?
Standard sizes typically ship within 7–12 working days from order confirmation; custom coils and cut lengths are quoted with a project-specific lead time. Submit your required delivery date with the inquiry for confirmation.
Need a clear FEP tubing sample or a factory quote? Share your media, operating pressure, temperature, and connection type — our technical sales team responds within 2 business hours.
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No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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