Kynar PVDF Derating Factors

PVDF Kynar Derating Factor Table

The following table outlines the derating factors for PVDF pipe. Similar to other thermoplastics such as polyethylene (PE) and polyvinyl chloride (PVC), polyvinylidene fluoride (PVDF) will decrease in its range of acceptable service pressure (PSI) as service temperatures increase. In other words, as the fluid temperatures within PVDF increase, the ability for PVDF to withstand greater pressure strains will decrease. 

To determine the change in acceptable PVDF pressure tolerance based on temperature, a derating factor is used. The derating factor at the specified temperature is multiplied by the pipe’s ambient pressure rating. The result is the pipe’s acceptable pressure range at that temperature. Review the following PVDF derating factors:

Temperature, °F

Temperature, °C

PVDF Derating Factor

21

70

1.0

27

80

0.9

32

90

0.9

38

100

0.8

43

110

0.8

49

120

0.7

54

130

0.7

60

140

0.6

65

150

0.6

71

160

0.5

82

180

0.5

93

200

0.4

104

220

0.4

121

250

0.4

138

280

0.3


Other Resources

What is PVDF | Manufacture, Properties & Common Uses PVDF Measurement Table | Pipe Sizes and Weights Compare PVDF vs PVC, CPVC and Metal Pipe