Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| dilute | A* | – |
* estimated rating, given in the source without a temperature
Material comparison at 20 °C
Resistance overview
FEP shows very good resistance (A) to Potassium Hypochlorite at dilute at 20 °C, meaning the material remains essentially unaffected by this chemical under standard laboratory test conditions. The rating remains stable between 20 °C and 50 °C, which means this material can also handle moderately elevated process temperatures without additional risk.
Application context
Potassium Hypochlorite is commonly encountered in pulp and paper and bleaching. FEP (Fluorinated ethylene propylene) is a fluoropolymer typically used for seals, gaskets, valve seats and lined equipment. Because Potassium Hypochlorite is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
FEP can be used with confidence for Potassium Hypochlorite containment and handling. The A rating indicates that the material shows no significant change in weight, dimensions, or mechanical properties after prolonged contact under test conditions. This holds true at both 20 °C and 50 °C, giving a good safety margin for typical process environments.
Did you know?
Fluorinated ethylene propylene is commonly chosen for seals, gaskets, valve seats and lined equipment because of its combination of chemical resistance, mechanical strength, and cost-effectiveness.
Materials rated A or B at 20 °C
Based on the row for dilute, 20 °C.
- Thermoplastics
- HDPE A, PP A, PVC Rigid A, LDPE A, PVC Flexible A, Polysulfone A, PMP A
- Fluoropolymers
- PTFE A, PVDF A
- Elastomers
- Viton (FPM) A
- Metals
- SS 316 B
About FEP
FEP has nearly the chemical resistance of PTFE and can be melt-processed. Its service temperature, about 200 °C, is lower than that of PTFE.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.