High-Transparency FEP Rigid Pipe | Precision Engineered Fluoropolymer
Cylex Plastics provides premium FEP (Fluorinated Ethylene Propylene) Rigid Pipes, specifically designed for applications where high optical clarity and total chemical inertness are mandatory. FEP offers a unique combination of PFA-like chemical resistance and exceptional transparency, allowing for full visibility of fluid flow and color.
Our FEP rigid pipes are manufactured with strict dimensional tolerances, ensuring a perfect fit for high-precision laboratory equipment, environmental monitoring systems, and semiconductor wet benches.
CYLEX supports small-batch customization, offers volume purchasing discounts, ensures rapid delivery, and provides comprehensive after-sales service guarantees.
If you require a quotation or wish to inquire about further details regarding PFA product customization and processing, please feel free to contact us at any time.
Material:
PFA (Perfluoroalkoxy Alkanes)
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Key Performance Features
- Exceptional Transparency: The most transparent fluoropolymer available for real-time fluid monitoring.
- Chemical Versatility: Resistant to virtually all acids, bases, and solvents.
- Working Temperature: Reliable performance from -70°C to +200°C.
- Precise Tolerances: High-accuracy manufacturing with OD tolerances as tight as ±0.1mm.
- Weather & UV Resistance: Zero degradation under direct sunlight or harsh atmospheric conditions.
- Low Water Absorption: Absorption rate < 0.01%.
- Non-flammability: Does not burn in air (Oxygen Index > 95 vol%).
- Non-toxicity: Physiologically inert.
- Minimal Non-stick Properties: No scale accumulation on the inner or outer walls of the tubing; no flow stagnation.
- Electrical Reliability and High Insulation: Dielectric constant remains 2.1 across a frequency range of 60 Hz to 60 MHz, under both high and low-temperature conditions; even if the surface is damaged by arcing, no conductive tracks will form.
- Ease of Secondary Processing: Capable of self-sealing, self-welding, flaring, and coiling.
Key Technical Parameters
Technical Comparison Table
Frequently Asked Questions (FAQ)
Q: Can FEP pipes be used for vacuum applications?
A: Yes. Due to the rigid wall construction and precise tolerances (up to ±0.2mm wall thickness control), our FEP pipes provide better vacuum resistance than thin-walled flexible tubing.
Q: Is FEP more transparent than PFA?
A: Yes, FEP generally offers slightly better optical clarity and a lower refractive index than PFA, making it the preferred choice for sight glass applications.
Q: Do you offer custom lengths beyond 100 meters?
A: As a non-standard product provider, we can supply custom cut-to-length pipes or continuous coils depending on the diameter and wall thickness required for your system.
FEP Rigid Pipe Specifications
| ID (mm) | ID (inch) | OD (mm) | OD (inch) | OD Tolerance (mm) | OD Tolerance (inch) | Wall Thickness Tolerance (mm) | Wall Thickness Tolerance (inch) | Length (m) | Length (ft) |
|---|---|---|---|---|---|---|---|---|---|
| 1.6 | 0.063 | 3.2 | 0.126 | ±0.1 | ±0.004 | ±0.1 | ±0.004 | 100 | 328 |
| 2 | 0.079 | 4 | 0.157 | ±0.12 | ±0.005 | ±0.1 | ±0.004 | 100 | 328 |
| 4 | 0.157 | 6 | 0.236 | ±0.12 | ±0.005 | ±0.1 | ±0.004 | 100 | 328 |
| 6 | 0.236 | 8 | 0.315 | ±0.15 | ±0.006 | ±0.15 | ±0.006 | 100 | 328 |
| 8 | 0.315 | 10 | 0.394 | ±0.15 | ±0.006 | ±0.15 | ±0.006 | 100 | 328 |
| 10 | 0.394 | 12 | 0.472 | ±0.2 | ±0.008 | ±0.15 | ±0.006 | 100 | 328 |
| 12 | 0.472 | 14 | 0.551 | ±0.2 | ±0.008 | ±0.15 | ±0.006 | 100 | 328 |
| 14 | 0.551 | 16 | 0.630 | ±0.2 | ±0.008 | ±0.15 | ±0.006 | 100 | 328 |
| 16 | 0.630 | 18 | 0.709 | ±0.2 | ±0.008 | ±0.15 | ±0.006 | 100 | 328 |
| 16 | 0.630 | 19 | 0.748 | ±0.2 | ±0.008 | ±0.2 | ±0.008 | 100 | 328 |
| 19 | 0.748 | 22 | 0.866 | ±0.2 | ±0.008 | ±0.2 | ±0.008 | 100 | 328 |
| 20 | 0.787 | 23 | 0.906 | ±0.3 | ±0.012 | ±0.2 | ±0.008 | 100 | 328 |
| 22 | 0.866 | 25 | 0.984 | ±0.3 | ±0.012 | ±0.2 | ±0.008 | 100 | 328 |
| 32 | 1.260 | 36 | 1.417 | ±0.3 | ±0.012 | ±0.2 | ±0.008 | 100 | 328 |
| 36 | 1.417 | 40 | 1.575 | ±0.3 | ±0.012 | ±0.2 | ±0.008 | 100 | 328 |
Comparison of Main Performance of Fluorocarbons
| Properties | ASTM Method & Conditions | POLYFLON PTFE | NEOFLON PFA | NEOFLON FEP | NEOFLON ETFE | NEOFLON PCTFE | NEOFLON PVDF |
|---|---|---|---|---|---|---|---|
| Physical Properties | |||||||
| Specific Gravity | D792 | 2.13-2.22 | 2.12-2.17 | 2.12-2.17 | 1.70-1.86 | 2.10-2.14 | 1.76-1.78 |
| Water Absorption (%) | D570/24h, 1/3"t | < 0.00 | < 0.01 | < 0.00 | < 0.1 | < 0.00 | 0.04 |
| Molding Shrinkage (cm/cm) | - | 0.02-0.05 | 0.04 | 0.03-0.06 | 0.03-0.04 | 0.015-0.020 | 0.014 |
| Contact Angle (°) | Angle with Horizontal | 110 | 115 | 114 | 96 | 84 | 82 |
| Thermal Properties | |||||||
| Thermal Conductivity (W/cm·k) | C177 | 0.25 | - | 0.25 | 0.24 | 0.20-0.22 | 0.13 |
| Linear Expansion Coeff. (1/°C) | D696 / 23-60°C | 10 × 10⁻⁵ | 12 × 10⁻⁵ (+20~+100°C) | (+50~+100°C) 8.3-10.5 × 10⁻⁵ | 5-9 × 10⁻⁵ | 4.5-7.0 × 10⁻⁵ | 4.2 × 10⁻³ |
| Melting Point (°C) | - | 327 | 302-310 | 270 | 260 | 210-212 | 173-175 |
| Melt Viscosity (P) | - | 10¹¹-10¹³ (340-380°C) | 10⁴-10⁵ (380°C) | 4×10⁴-10⁵ (380°C) | 10⁴-10⁵ (300-330°C) | 10⁷ (230°C) | 2×10³-10⁵ (210-270°C) |
| Max Continuous Use Temp (°C) | - | 260 | 260 | 200 | 150 | 120 | 150 |
| Mechanical Properties | |||||||
| Tensile Strength (Mpa) | D638 / 23°C | 20-45 | 27-35 | 19-22 | 40-50 | 31-41 | 39-59 |
| Elongation (%) | D638 / 23°C | 200-450 | 280-400 | 250-330 | 420-460 | 80-250 | 300-450 |
| Compressive Strength (Mpa) | D695 / 1% def, 25°C | 5-6 | 5-6 | 5-6 | 11 | 9-11 | 13-14 |
| Tensile Modulus (Mpa) | D638 / 23°C | 392 | 451 | 343 | 490-784 | 1029-2058 | 784-1960 |
| Flexural Modulus (Mpa) | D790 / 23°C | 490-588 | 647-686 | 539-637 | 882-1372 | 1274-1764 | 1372-1764 |
| Impact Strength (J/m) | D256 / 23°C Cantilever | 160 | Non-break | Non-break | Non-break | 133-144 | 1104 |
| Hardness (Shore) | Durometer | D50-D65 | D60 | D55 | D75 | D80 | D75-D85 |
| Deformation Under Load (%) | D621 / 100°C, 6.8Mpa,24h | 5.0 | 2.4 | 5.0 | 5.4 | 2.6 | 2.4 |
| Deformation Under Load (%) | D621 / 25°C, 13.7Mpa,24h | 7.0 | 2.7 | 3.0 | 2.3 | 0.2 | 0.7 |
| Static Friction Coeff. | vs. Steel | 0.02 | 0.05 | 0.05 | 0.06 | 0.08 | 0.4 |
| Electrical Properties | |||||||
| Dielectric Constant | D150 / 10³ Hz | 2.1 | 2.1 | 2.1 | 2.6 | 2.3-2.7 | 7.72 |
| Dielectric Constant | D150 / 10⁶ Hz | 2.1 | 2.1 | 2.1 | 2.6 | 2.3-2.5 | 6.43 |
| Dielectric Loss Factor | D150 / 10³ Hz | <1×10⁻⁵ | 1×10⁻⁵ | 6×10⁻⁵ | 8×10⁻⁴ | 2.3-2.7×10⁻² | 1.9×10⁻² |
| Dielectric Loss Factor | D150 / 10⁶ Hz | <2×10⁻⁵ | 3×10⁻⁵ | 5×10⁻⁵ | 5×10⁻³ | 1×10⁻² | 0.159 |
| Dielectric Strength (MN/m) | D149 / Short, 3.2mm | 19 | 20 | 20-24 | 16 | 20-24 | 10 |
| Volume Resistivity (Ω·cm) | D257 | >10¹⁸ | >10¹⁸ | >10¹⁸ | >10¹⁸ | >10¹⁶ | 2×10¹⁴ |
| Other Properties | |||||||
| Chemical Resistance | - | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| Weather Resistance | - | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent |
| Flame Retardancy (LOI %) | D2863 / Oxygen Index | >95 | >95 | >95 | 31 | >95 | 43 |
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