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: