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When operating in relatively new plant, a hydrocarbon solvent was being heated to reflux in a Hastelloy vessel by setting the jacket temperature 30°C above the boiling point, a typical setting for many solvents in glass lined vessels.  In the vent, the temperature overshot the set point and the contents boiled vigorously.

The following factors contributed to the incident:

The incident was of no consequence; nevertheless flammable solvents present a fire risk and any loss of containment presents a risk.

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