Always make an immersion test before choosing a tube material for critical applications. Immerse a short length of the tubing (always available from Watson-Marlow Pumps or its distributors) in a closed container of the fluid for 48 hours, and then examine it for signs of attack, swelling, embrittlement or other deterioration.
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Little to minor effect 0-5% volume swell
Moderate effect 5% - 10% volume swell
Severe effect 10% or greater volume swell
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