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March 10, 2021

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Chemical manufacturing company fined £560,000 after employee scalded with boiling water

Calachem Limited, a chemical manufacturing company, has been fined after an employee was scalded with boiling water during a cleaning operation.

Work was undertaken to clean down part of a production plant in Grangemouth, Scotland, on 4 March 2016, Falkirk Sheriff Court was told. The cleaning process involved filling a chemical powder charging chute leading down to a reaction vessel with water that was brought to the boil by immersing a steam hose in it.

The water in the chute was boiled overnight and the following day the employee continued with the clean down process. When he tried to empty the boiling water from the charge chute, he opened a valve expecting the water to drain down into the vessel below. However, the vessel below the chute had been pressurised with nitrogen gas and when the valve was opened the pressure in the vessel was released, the scalding water erupted back up and out of the chute severely scalding the employee.

The HSE’s investigation found that a relatively safe cleaning process of washing down the charge chute with cold water into the vessel below had evolved and changed over time. The process had developed into the practice of overnight boiling of water in the charge chute, while simultaneously pressurising the reaction vessel below as part of a recirculating cleaning cycle. The incremental changes to the cleaning process were not subject to a review of the company’s risk assessment and the danger of pressurising a vessel below a chute of boiling water was not recognised, consequently no control measures were put in place to remove this danger.

The practice of filling the powder charge chute with boiling water has ceased since the incident. The processes to clean down the plant have been risk assessed to introduce new safer worker procedures.

Calachem Limited of Peters Square, Manchester pleaded guilty to breaching Section 2 of the Health and Safety at Work etc Act 1974. They were fined £560,000.

Speaking after the hearing, HSE Inspector Gerard McCulloch said: “Those in control of working processes have a responsibility to assess the associated risks. If changes are made, which increase the level of risk, those in control of the workplace have a duty to reduce the risk back down to as low a level as reasonably practicable.

“If the decision to boil water in the chute instead of hosing it down with a cold water had been the subject of a risk assessment, the danger from the pressurised vessel below would have been identified prior to the incident. This would have prevented the employee severe injury and permanent disfigurement.”

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