What is FEP and what is FEP used for?
FEP (Fluorinated Ethylene Propylene) is a high-performance fluoropolymer used in chemical processing, pharmaceutical manufacturing, laboratory instrumentation and industrial fluid handling systems. Known for it’s chemical inertness, thermal stability and low coefficient of friction, FEP is engineered for demanding environments where purity, durability and reliability are critical.
This guide covers FEP material properties, performance benefits and key industrial applications.
What is FEP?
FEP is a melt-processable fluoropolymer copolymerized from tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). It belongs to the same family as PTFE but offers improved clarity, flexibility and extrusion capability.
FEP is widely specified for:
- Chemical transfer lines
- High-purity fluid handling
- Pharmaceutical and biotech systems
- Analytical and laboratory equipment.
FEP Material Properties and Benefits
Key performance characteristics that make FEP suitable for industrial and commercial environments:
Operating Temperature Range: FEP can withstand both high and low temperatures, with a working temperature range typically spanning from -200°C to 200°C (-328°F to 392°F), depending on the specific grade of FEP used.
Chemical Resistance: Resistant to nearly all acids, bases, fuels, solvents, and corrosive fluids, making it an ideal choice for applications where exposure to corrosive substances is common, such as chemical processing and semiconductor manufacturing.
Dielectric Strength: FEP has excellent dielectric properties, making it an excellent choice for electrical insulation applications.
Coefficient of Friction: Extremely low, enabling smooth fluid, filament flow and minimising particulate buildup.
Transparency: FEP is known for its exceptional optical clarity, allowing for easy visual monitoring of fluids or processes inside the tubing without the need for disassembly.
Non-Permeable & Non-Reactive: Prevents contamination and product absorption.
Long Service Life and Reliability: FEP does not degrade under UV, moisture or industrial cleaning agents.
Flexibility: FEP tubing is highly flexible, even at low temperatures, making it suitable for applications that require manoeuvrability around tight bends and corners.
Common standards and compliance of FEP
Common Applications of FEP
The versatility of FEP lends itself to a wide range of applications across various industries:
FEP Availability
FEP Tubing is available from Polyflon in long continuous lengths on spools or in coils and can be thermoformed into custom 2D shapes or tip-formed. High Purity grades are also available.
Find out more here > FEP Tubing availability.
FEP film is available in semi-finished form on standard rolls, or can be converted into finish cut/thermoformed/punched parts.
Find out more here > FEP Film availability.
Have any questions or need a quote?
If you wish to compare FEP against other commonly used Fluoropolymers you can download our Fluoropolymer Tubing Materials guide here.
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