Confined space fatality – Sharp LadyThe
Isle of Man Ship Registry has published Casualty Investigation Report
No. CA118 on a confined space entry fatality that occurred on a crude
tanker. The incident occurred after discharging crude oil. Equipment was
lost at the bottom of a tank. It was decided that once the discharge
was finished and crude oil washing completed, the equipment should be
retrieved before loading the next cargo into this tank, to avoid any
potential damage to the ship’s equipment.
The
Chief Officer and Cadet entered the cargo tank after an enclosed space
work permit and risk assessment had been completed. When the Chief
Officer and Cadet reached the bottom of the cargo tank they felt
debilitating effects of hydrocarbon vapour present at the lower level of
the cargo tank. Both the Chief Officer and Cadet attempted to activate
their Emergency Escape Breathing Devices (EEBD) and exit the cargo tank.
The
Master observed the Cadet in difficulty and quickly entered the tank,
ignoring the advice of a fellow crew member. The Chief Officer
successfully exited the cargo tank but the Cadet had collapsed
unconscious on the tank bottom. When the Master reached the tank bottom
to aid the Cadet he was overcome by hydrocarbon vapour and collapsed.
The
alarm was raised and a rescue was quickly initiated. The Master and
Cadet were retrieved from the bottom of the cargo tank and brought to
the main deck where first aid was administered. The report concludes
that the Master died and the Cadet was injured as a result of entering
the cargo tank containing a concentration of hydrocarbon vapour at the
bottom of the cargo tank. The ship’s safety procedures for enclosed
space were not fully complied with and the risk posed by the hydrocarbon
vapour measured in the cargo tank was not appreciated by those involved
in the tank entry preparations.
The report also concludes that
opportunities were missed on board to stop the tank entry by several
crew members and that the death of the Master could have been prevented
had the safety procedures on board been followed in full.
The full report can be found at gov.im/lib/docs/ded/shipregistry/formsdocs/reports/casualty/iompg12.pdf
Source:IMCA
August 24, 2018
August 22, 2018
August 18, 2018
Cross sensitivity of detectors
During an examination of a liquefied natural gas (LNG) carrier whose
cargo tanks contained ethylene vapors, CO (Carbon Monoxide) gas alarms
were received which were traced to an eight-inch crack on a cargo vapor
line.
It was noted that the molecular weight of Ethylene (28 g/mol) was identical to the molecular weight of CO, which accounted for the CO PPM readings. Coast Guard personnel contacted the manufacturer who confirmed that gases such as methane, propane, ethylene and mercaptan, could actuate the CO sensor without ever coming into the range of the LEL limits.
As a result of these events the Coast Guard “strongly reminds all surveyors, marine inspectors, port state control examiners, and any other persons utilizing portable gas monitors and detectors while working onboard on Liquefied Gas Carriers to remain acutely aware that the ethylene gas vapors can exhibit cross-sensitivity. This issue is not limited to the monitors that the Coast Guard uses but also those made by other manufacturers. Everyone using a monitor must be aware that if the CO alarm goes off it may be an indication of dangerous gases or chemical vapors and not the presence of CO. When the alarm sounds users must take corrective action to minimize exposure risks.”
Courtesy: USCG
It was noted that the molecular weight of Ethylene (28 g/mol) was identical to the molecular weight of CO, which accounted for the CO PPM readings. Coast Guard personnel contacted the manufacturer who confirmed that gases such as methane, propane, ethylene and mercaptan, could actuate the CO sensor without ever coming into the range of the LEL limits.
As a result of these events the Coast Guard “strongly reminds all surveyors, marine inspectors, port state control examiners, and any other persons utilizing portable gas monitors and detectors while working onboard on Liquefied Gas Carriers to remain acutely aware that the ethylene gas vapors can exhibit cross-sensitivity. This issue is not limited to the monitors that the Coast Guard uses but also those made by other manufacturers. Everyone using a monitor must be aware that if the CO alarm goes off it may be an indication of dangerous gases or chemical vapors and not the presence of CO. When the alarm sounds users must take corrective action to minimize exposure risks.”
Courtesy: USCG
August 16, 2018
August 12, 2018
August 9, 2018
August 5, 2018
Level gauge and Bromine Transportation incident
Mixed acid charging in the reactor was in progress. Level gauge of mixed acid measuring vessel broke and mixed acid splashed on the body of two employees, injuring them seriously. Root Causes: Inadequate preventive maintenance, Employees not aware about potential hazard involved in the operation.
Transportation of Bromine carried out in glass bottle having 3 Kgs capacity in wooden box by goods vehicle. During transportation few bottles broken & started leaking. Due to leakage near by area affected with bromine gas. People around the area were affected due to inhalation. Root Causes: Inadequate packing of bromine bottle. Untrained driver.
Courtesy: A.G.Shingore, National Safety Council
Transportation of Bromine carried out in glass bottle having 3 Kgs capacity in wooden box by goods vehicle. During transportation few bottles broken & started leaking. Due to leakage near by area affected with bromine gas. People around the area were affected due to inhalation. Root Causes: Inadequate packing of bromine bottle. Untrained driver.
Courtesy: A.G.Shingore, National Safety Council
July 28, 2018
July 24, 2018
Loss of Primary Containment (LOPC)
Loss of Primary Containment (LOPC): An unplanned or uncontrolled release of material from primary containment, including non-toxic and non-flammable materials (e.g., steam, hot condensate, nitrogen, compressed CO2 or compressed air).
Source: CCPS Glossary
Source: CCPS Glossary
July 22, 2018
July 20, 2018
July 19, 2018
Controlling corrosion
Controlling corrosion: Roland Anderson, Executive VP at Cosasco, warns not to conflate cause and effect.
July 16, 2018
July 12, 2018
Lessons learnt from a refinery fire
- A fire started while draining naphtha from a pipeline that ran through a pump house at the refinery.
- Investigations revealed that there were three main lapses that led to the fire:
(a) The refinery had allowed its contractors to drain naphtha from the pipeline by allowing the naphtha to flow out from two open valves and an open flange joint of the pipeline into trays. This open system of de-oiling allowed naphtha vapour to escape into the atmosphere resulting in an accumulation of flammable vapour, which would in turn pose a danger of ignition.
(b) The refinery had allowed the use of a plastic tray, which was a non-conductive container, as a receptacle for collection of naphtha. The free fall of naphtha onto the plastic tray would allow accumulation of static charges as a result of the friction caused between them. When the accumulated static charges come into contact with any good conductor, they are instantaneously transferred to the conductor. A spark could be caused as a result of the sudden surge of energy during the transfer, which could be sufficient to ignite the naphtha vapour which is within flammable range in the atmosphere.
(c) The refinery failed to deploy portable gas monitors sufficiently close to the open de-oiling area to give the warning when the build-up of the flammable vapour reached an undesirable level.
July 8, 2018
First responders practice with large-scale simulation
First responders practice with large-scale simulation: FRANKLIN CO. -- First responders from across southern Illinois were running drills to prepare for emergency situations that could occur in our communities. Dozens of fire trucks, ambulances, and ...
July 4, 2018
Work permit incidents
- Installation of new Sulfuric acid tank was going on. Two employees were welding on top of the tank. Suddenly the neighboring acid tank exploded. Two persons died. Root Causes were nascent hydrogen caught fire and Hot work was going one very near to acid filled tank.
- Two workers were doing maintenance work inside the kettle. Personnel from production started charging CO in the same kettle, assuming that it is empty & ready for charging next batch. Due to inhalation of carbon monoxide two workers died in the kettle.Root causes: Ineffectiveness of work permit system .
Courtesy: A.G.Shingore, National Safety Council
July 1, 2018
June 28, 2018
Integrity Manuals: The Most Significant Factor in Avoiding Asset Failure
Integrity Manuals: The Most Significant Factor in Avoiding Asset Failure: This special report, authored by Richard Fish, Asset Integrity Specialist, demonstrates the importance of integrity manuals when it comes to combating asset corrosion.
June 24, 2018
No excuse for cutting corners on corrosion in downstream plants
No excuse for cutting corners on corrosion in downstream plants: The risks to safety and revenue associated with corrosion in refineries and petrochemical plants are too high to ignore. Phil Yule, Cosasco, explains.
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