Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| anhydrous | D | D |
Material comparison at 20 °C
Resistance overview
Nylon (PA) is not resistant (D) to Hydrogen Fluoride at anhydrous and should not be used in direct contact. The chemical is expected to cause rapid degradation, which can include dissolution, cracking, severe swelling, or complete structural failure of the material.
Application context
Hydrogen Fluoride is commonly encountered in water treatment and food processing. Nylon (PA) (Polyamide (nylon)) is a thermoplastic typically used for tanks, piping, containers and liners. Because Hydrogen Fluoride is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.
Practical recommendation
Nylon (PA) is not recommended for use with Hydrogen Fluoride. The D rating indicates that the material will suffer rapid and severe degradation, which may include cracking, dissolution, severe swelling, or complete structural failure. Using this combination risks equipment damage, leaks, and potential safety incidents. Consider using FEP, PTFE instead, which are rated A for this chemical and offer reliable long-term performance.
Did you know?
When choosing between thermoplastics for Hydrogen Fluoride service, engineers consider not just the resistance rating but also factors such as permeation rate, creep resistance, and weldability.
Materials rated A or B at 20 °C
Based on the row for anhydrous, 20 °C.
- Thermoplastics
- PP B
- Fluoropolymers
- PTFE A, FEP A
About Nylon (PA)
Polyamide (nylon) resists fuels, oils and many solvents. Mineral acids, even dilute, and strong oxidisers attack it, and it absorbs water.
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.