Comparison
CPVC Hot Water Pipe vs PEEK
A side-by-side comparison of Chlorinated Polyvinyl Chloride for Hot Water Piping and Polyether Ether Ketone.
Physical
Density
1.50-1.65 g/cm³
1.32 g/cm³
Water Absorption (24h)
0.1-0.5 %
0.15 %
Transparency
Opaque
Opaque (amber)
Shrinkage
0.5-1.5 %
1.1 – 1.4 %
Mechanical
Young's Modulus
2.0-3.5 GPa
3.6 GPa
Tensile Strength
45-55 MPa
100 MPa
Elongation at Break
15-30 %
50 %
Impact Strength (Izod)
20-40 J/m
55 J/m
Flexural Strength
—
170 MPa
Thermal
Glass Transition Temperature
90-110 °C
143 °C
Melting Point
N/A (degrades)
343 °C
Continuous Service Temperature
70-90 °C
260 °C
Heat Deflection Temperature
80-100 °C
160 °C
Electrical
Dielectric Constant
3.5-4.0
3.2
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹⁶ Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Excellent
Bases
Excellent resistance
Excellent
Solvents
Attacked by ketones, esters, chlorinated and aromatic hydrocarbons
Excellent
UV Resistance
Poor (requires stabilization)
Fair
Hydrolysis (steam)
—
Excellent
Sustainability
Recyclability
Recyclable (challenging)
Recyclable (specialty)
Recycling Code
3 (PVC)
7
Carbon Footprint
Moderate to High
~30 kg CO₂e / kg