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
August 18, 2018
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
August 1, 2018
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.
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