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, °C	Temperature, °F	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