In , a huge explosion ripped apart a chemical plant in to confirm that the disaster at the Nypro plant at Flixborough was the result of. Failure Knowledge Database / Selected Cases. 1. Disaster of Chemical Plant at Flixborough. June 1st. , Flixborough UK. TAKEGAWA. Flixborough chemical plant explosion marked with service The disaster at Nypro chemical plant, near Scunthorpe, Lincolnshire, left

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Rules, designed to protect those who drew them up if something goes wrong, are readily ignored in day-to-day work.

Outside the works, injuries and damage fliixborough on a widespread scale but there were no fatalities. Retrieved 26 June No drawing of the proposed modification was produced. The plant design had assumed that the worst consequence of a major leak would be a plant fire and to protect against this a fire detection system had been installed. Once identified measures should be taken both to prevent such a disaster so far as is possible and to minimise its consequences should it occur despite all precautions.

Safety documents were needed both for design and operation. Only the plant engineer was concerned about restarting before the reason for the flixbprough was understood, and the other reactors flixobrough.

Failure had been accelerated by contact with molten zinc and there were indications that an elbow in the pipe had been at significantly higher temperature than the rest of the pipe. Finite element analysis has been carried flixorough and suitable eyewitness evidence adduced to support this hypothesis.

Fires started on-site which were still burning ten days later.

Flixborough 1974 chemical plant explosion marked with service

The inquiry report took the view that explosions frequently throw debris in unexpected directions and eyewitnesses often flixbkrough confused recollections. It was postulated that there had been bulk water in reactor 4 and a disruptive boiling event had occurred when the interface between it and the reaction mixture reached operating temperature.

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This resulted in the escape of a large quantity of cyclohexane. The reactors were constructed from mild steel with a stainless steel lining; when operating they held in total about tonnes of flammable liquid at a flicborough pressure of 8.

These requirements applied not floxborough to changes to equipment, but also to process changes. Flixborough led to a widespread public outcry over process plant safety. The foundations of properties severely damaged by the blast and subsequently demolished can be found on land between the estate and the village, on the route known as Stather Road.

My grandfather in Grimsby heard the explosion and thought it was very strange thunder. Places Forest Pines to become North Lincolnshire’s second Hilton hotel as it joins global brand It is one of five Q Hotels properties to be rebranded under flixborohgh DoubleTree by Hilton name under a franchise agreement.


When this met an ignition source probably a furnace at a nearby hydrogen production plant [B] there was a massive fuel-air explosion. The company would have to show that “it possesses the appropriate management system, safety philosophy, and competent people, that it has effective methods flixboriugh identifying and evaluating hazards, that it has designed and operates the installation diszster accordance with appropriate regulations, standards and codes of practice, that it has adequate procedures for dealing with emergencies, and that it makes use of independent checks where appropriate”.

It was the biggest explosion to ever occur in Britain during peacetimeuntil the fire at the Hertfordshire oil storage terminal Buncefield in December June 1,was a sultry afternoon, with people shopping in Scunthorpe town centre or enjoying themselves at the Appleby-Frodingham flixboeough gala at Brumby Hall when catastrophe struck shortly before 5pm.

Flixborough disaster – Wikipedia

Journal of Loss Prevention in the Process Industries. Skip to content Skip to navigation. Around 1, buildings within a mile radius of the site in Flixborough itself and in the neighbouring villages of Burton upon Fkixborough and Amcotts were damaged, as were nearly in Scunthorpe three miles away ; the blast was heard over thirty miles away in Grimsby and Hull.

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Flixborough, 1 June | The National Archives blog

There was a lot of discussion after as the chemical past though the local villages in tankers. Together with the passage of the Health and Safety at Work Act flicborough the same year it led to and is often quoted in justification of a more systematic approach to process safety in UK process industries, and — in conjunction with the Seveso disaster and the consequent EU ‘Seveso directives’ — to explicit UK government regulation of plant processing or storing large inventories of hazardous materials, currently by the Control of Major Accident Hazards Regulations COMAH.

A major leak of liquid from the reactor circuit caused the rapid formation of a large cloud of flammable hydrocarbon. The major problem was thought to be fliixborough reactor 5 moved out of the way.

It was so informative, we had an argument about whether to focus on the disaster itself or the possible causes of it. Neither when they were first built, nor now that they are in operation, has any local or government agency exercised effective control over their safety. Where instruments or electrical equipment were involved signatures would also be needed from the relative specialist instrument manager or electrical engineer.


The reactors were normally mechanically stirred but reactor 4 had operated without a working stirrer since November ; free phase water could have settled out in unstirred reactor 4 and the bottom of reactor 4 would reach operating temperature more slowly than the stirred reactors.

Images of the disaster were soon shown on television, filmed by BBC and Yorkshire Television filmstock news crews who had been covering the Appleby-Frodingham Gala in Scunthorpe that afternoon. Wed 11 Jun at 8: The inch bypass was therefore clearly not what would have been produced or accepted by a more considered process, but controversy developed and became acrimonious as to whether its failure was the initiating fault in the disaster the inch hypothesis, argued by the plant designers DSM and the plant constructors; and favoured by the court’s technical advisers [3]or had been triggered by an external explosion resulting from a previous failure of the 8-inch line argued by experts retained by Nypro and their insurers [3].

The approach advocated by the ACMH was largely followed in subsequent UK legislation and regulatory action, but following the release of chlordioxins by a runaway chemical reaction at Seveso in northern Italy in July’major hazard plants’ became an EU-wide issue and the UK approach became subsumed in EU-wide initiatives the Seveso Directive insuperseded by the Seveso II Directive in Mon 2 Jan at 8: We would not contest that the best run companies achieve high standards of safety, but we believe this is because they have Failings in technical measures A plant modification occurred without a full assessment of the potential consequences.

The casualty figures could have been much higher, if the explosion had occurred on a weekdaywhen the main office area would have been occupied. Significant overpressures could be developed where the release was large, and ignition delayed: Prior to the explosion, on 27 Marchit was discovered that a vertical crack in reactor No. One of the teachers at my school lost a relative in the explosion. Since the accident took place at a weekend there were relatively few people on site: Learning from Accidents, 3rd edition.

No calculations were undertaken for the dog-legged shaped line or for the bellows. The blast was such that it threw me full length across the road. We use the phrase “already remote” advisedly for we wish to make it plain that we found nothing to suggest that the plant as originally designed and constructed created any unacceptable risk.