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Thermoplastic Valves Product Guide & Engineering Specifictions
Materials
Page 717 Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Spears
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Temperature Pressure De-rating for PVC, CPVC & PP Thermoplastic Materials
Elevated temperature fluid mediums require a de-rating of thermoplastic pipe maximum internal pressure ratings at 73°F. To
determine the maximum internal pressure rating at an elevated temperature, simply multiply the pipe pressure rating at 73°F
by the percentage specified for the desired temperature.
PLEASE NOTE — Valves have different elevated temperature ratings than pipe & fittings. See individual valve recommendations.
Typical Physical Properties of PVC, CPVC & PP Thermoplastic Materials
The following table lists typical physical properties of PVC, CPVC and PP thermoplastic materials. Variations may exist
depending on specific compound and product.
* Glass filled PP will have slightly different values with higher tensile strength.
System
Operating
Temperature
°F (°C)
73
(23)
80
(27)
90
(32)
100
(38)
110
(43)
120
(49)
130
(54)
140
(60)
150
(66)
160
(71)
170
(77)
180
(82)
190
(88)
200
(93)
210
(99)
PVC 100% 90% 75% 62% 50% 40% 30% 22% -0- -0- -0- -0- -0- -0- -0-
CPVC 100% 100% 91% 82% 73% 65% 57% 50% 45% 40% 32% 25% 22% 20% -0-
PP 100% 90% 75% 70% 65% 50% 42% 36% 30% 25% 20% 15% -0- -0- -0-
Properties ASTM Test Method PVC CPVC PP Natural*
Mechanical Properties, 73°F
Specific Gravity
Tensile Strength, psi
Modulus of Elasticity, psi
Compressive Strength, psi
Flexural Strength, psi
Izod Impact, notched, ft-lb/in
D 792
D 638
D 638
D 695
D 790
D 256
1.41
7,200
440,000
9,000
13,200
.65
1.55
8,000
360,000
10,100
15,100
1.50
.907
5,240
231,000
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3.02
Thermal Properties
Heat Deflection
Temperature, °F
at 66 psi
Thermal Conductivity,
BTU/hr/sq ft/°F/in
Coefficient of Linear
Expansion,
in/in/°F
D 648
C 177
D 696
165
1.02
3.1 x 10
-5
217
.95
3.4 x 10
-5
201
5.42 x 10
-5
Flammability
Limiting Oxygen Index, %
UL 94 Rating
D 2863 43
94V-0
60
V-0, 5VB, 5VA HB
Other Properties
Water Absorption, % 24 hr.
Industry Standard Color
Minimum ASTM Cell Classification
NSF
®
Potable Water
Approved
D 570
D 1784/D 4101
.05
Dark Gray / White
12454
Yes
.03
Medium Gray
23447
Yes
.02
Natural/Beige
PP0112 B65242
Yes