The initial selection of a hose for chemicals can be based on its intended use given in the catalogue description, the material of the inner layer and its chemical resistance given in Tubes International’s chemical resistance chart:
Substance | EPDM | EPM | NR | NBR | CR | SBR | FPM | UPE | PTFE | PVC | PU | PA |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Sulphuric acid 10% | A | A | C | C | B | C | A | A | A | C | X | X |
Sulphuric acid 10 ÷ 75% | B | A | X | X | X | X | A | A | A | X | X | X |
Sulphuric acid 96% | C | C | X | X | X | X | A/B | A | A | X | X | X |
Fuming sulphuric acid (oleum) | X | X | X | X | X | X | A | X | A | X | X | X |
Hydrochloric acid ≤ 20% | A | A | B | B | B | B | A | A | A | A | X | X |
The characteristics given in the table apply to the resistance at +20°C.
- A – excellent resistance, suitable for continuous operation,
- B – good resistance, intermittent operation,
- C – limited resistance, limited use,
- X – no resistance,
- – – no data.