Tech Information

Additional Specifications for HPLC Low-Pressure PFA Tubing

When selecting low-pressure PFA tubing for HPLC systems, it's helpful to understand the material's full performance profile. Some manufacturers provide detailed specifications across physical, mechanical, electrical, and thermal categories. Below is a summary of commonly listed values:

Physical Properties

• Density: 2.12 – 2.17 g/cc
• Water Absorption: < 0.03%
• Crystallinity: 48 – 70%
• Refractive Index: 1.350
• Radiation Resistance: 1 – 10 MRad
• Oxygen Index: > 95%

Mechanical Properties

• Hardness (Shore D): 55 – 60
• Ultimate Tensile Strength: 25 – 28 MPa
• Elongation at Break: 250 – 420%
• Modulus of Elasticity: 0.48 GPa
• Flexural Modulus: 0.50 – 0.70 GPa
• Coefficient of Friction: 0.04 – 0.20

Electrical Properties

• Volume Resistivity: 1.0 × 10¹⁸ Ω·cm
• Dielectric Constant (1 MHz): 1.9 – 2.1
• Dielectric Strength: 2030 V/mil

Thermal Properties

• Thermal Conductivity: 0.15 – 0.25 W/m·K
• Maximum Service Temperature (Air): 260 °C
• Minimum Service Temperature (Air): -200 °C
• Melting Temperature: 300 – 315 °C
• Glass Transition Temperature: 90 °C
• Decomposition Temperature: 475 °C
• Thermal Expansion Coefficient (20 °C): 120 – 140 µm/m·°C

These specifications can help guide tubing selection for applications requiring chemical resistance, thermal stability, and mechanical durability in HPLC systems.