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Category: COMAH bulletin

Safety notice – Storage tank external floating roof

Monday, July 7, 2014

This safety notice stresses the importance of maintaining the integrity of the roof, including maintaining the buoyancy of the structure.

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Safety notice – Liquid metal embrittlement by mercury in the refining and allied process industries

Friday, February 28, 2014

HSE is aware of a number of recent failures of primary containment, caused by Liquid Metal Embrittlement (LME) by mercury. This safety notice describes the potential integrity hazards relating to the presence of mercury in crude oil, the refining process and some downstream industries.

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Safety alert – Failure of a foot valve actuator on an LPG road tanker

Monday, January 13, 2014

A recent HSE investigation has found that piston actuators fitted to safety critical foot valves on LPG road tankers may not operate on demand at low temperatures created by a loss of containment.

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Safety notice – Chloride induced stress corrosion cracking of stainless steel thermowells

Tuesday, October 8, 2013

Thermowells can ‘breathe’ in atmospheric moisture; if the atmosphere contains halides and the thermowell is made from austenitic stainless steel then there is a probability that stress corrosion cracking will occur from the inside surface of the thermowell.

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Safety notice – Corrosion in trunnion supports of pipework containing hazardous substances

Tuesday, October 8, 2013

This safety notice describes the dangers of undetected corrosion in trunnion supports of pipework containing hazardous substances, in particular tubular trunnions fitted with an end cap, and the precautions necessary to ensure continued safe operation.

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Rupture of a crude oil storage tank

Wednesday, January 31, 2007

This safety alert is drawn up to spread the lessons learnt from the major oil release of

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