Page 100 - Facility Piping Systems Handbook for Industrial, Commercial, and Healthcare Facilities

PIPING

2.50 CHAPTER TWO

TABLE 2.7 General Properties of Thermoplastic Materials Used for Valves

Properties Unit PVC CPVC PP PPG PVDF
Specific — 1.43 1.45 0.92 1.03 1.76
gravity
Tensile psi 7,000– 8,500– 4,300– 9,950– 7,000–
strength 7,800 9,200 5,000 11,000 7,800
Elongation % 60–120 20–40 150–200 3–5 30–50
Tensile 10 3 psi 455–485 485–510 130–170 12,800– 170–200
modulus 14,220
Flexural psi 14,220– 14,220– 7,820– 13,510–
strength 15,560 17,060 9,240 14,930
Flexural
3
modulus 10 psi 384–412 426–555 213–228 540–570 227–256
Compressive
strength psi 12,800– 14,220– 8,530– 12,800–
14,220 15,560 9,950 14,220
Compression
3
modulus 10 psi 242–256 256–284 120–156 14–199
Poisson’s ratio — 0.37 0.35 0.44 0.28
Hardness
(Rockwell R) degree 115 118 95 107 110
Impact strength
(Izod)
w/V-notch kg-cm/cm 2 4–5 4–5 4–7 6–8 10–12
Resistance °F 140 194 194 221 248
to heat
(continuous)
Deflection °F 165 250 230 302 302
temperature
(at 66 psi)
Thermal kcal/mh°C 0.13 0.12 0.08 0.11
conductivity
Dielectric kV/m 0.90 0.90 1.02 1.18 1.18
strength
Volume ohm-in 2.0 × 10 15 2.3 × 10 15 1.9 × 10 15 0.4 × 10 15 1.95 × 10 15
resistivity
Dielectric
constant
10 Hz 2.8–3.0
60 Hz 3.15 2.93 2.42 9.8
103 Hz 3.14 2.92 2.41 9.5
106 Hz 2.85 2.69 2.41 2.2 7.5
Dissipation
factor
60 Hz 10 −2 1.18 1.09 0.05
3
10 Hz 10 −2 1.91 1.10 0.044 0.048
6
10 Hz 10 −2 1.72 0.92 0.063 0.02 0.160
Water absorption % 0.07 0.15 0.01 0.02 0.03
24 h, 1/8-in
thickness
Note: For Thermal expansion, see Table 2.15

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