Comparison
CPVC Hot Water Pipe vs PA66
A side-by-side comparison of Chlorinated Polyvinyl Chloride for Hot Water Piping and Polyamide 6,6 (Nylon).
Physical
Density
1.50-1.65 g/cm³
1.14 g/cm³
Water Absorption (24h)
0.1-0.5 %
1.2 %
Transparency
Opaque
Opaque
Shrinkage
0.5-1.5 %
1.5 – 2.0 %
Mechanical
Young's Modulus
2.0-3.5 GPa
3.0 GPa (dry)
Tensile Strength
45-55 MPa
80 MPa
Elongation at Break
15-30 %
60 %
Impact Strength (Izod)
20-40 J/m
50 J/m
Flexural Strength
—
110 MPa
Thermal
Glass Transition Temperature
90-110 °C
70 °C
Melting Point
N/A (degrades)
255 – 265 °C
Continuous Service Temperature
70-90 °C
100 – 120 °C
Heat Deflection Temperature
80-100 °C
75 °C (unfilled)
Electrical
Dielectric Constant
3.5-4.0
4.0
Volume Resistivity
10¹⁰-10¹² Ω⋅cm
10¹² Ω·cm
Dielectric Strength
15-25 kV/mm
—
Chemical resistance
Acids
Excellent resistance
Poor
Bases
Excellent resistance
Good
Solvents
Attacked by ketones, esters, chlorinated and aromatic hydrocarbons
—
UV Resistance
Poor (requires stabilization)
Fair
Alcohols
—
Good
Oils & Fuels
—
Excellent
Sustainability
Recyclability
Recyclable (challenging)
Recyclable
Recycling Code
3 (PVC)
7
Carbon Footprint
Moderate to High
~7.4 kg CO₂e / kg
Bio-based Content
—
0 – 100 % (bio grades)