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Capt.S.K.Moorthy |
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| Home | Indumoorthy's Residency | Road crossings on Pipelines | Gazomat Surveillance | Newsletter | Browse Programs | Indu, Kids & Me | Rehabilitation | Off-shore HSE | HSE Consultant |
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Off-shore HSE |
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Dropped Object Study improves Safety performance in Off-shore construction / maintenance job.
When anchorage happened to be close to flare, heat radiation was very high. Because, alternate anchoring could not be done as anchore patterns were approved by Marine dept with the concurrence of the Surveyor.Notonly that, carbon emission was very high and shoot-out used to fly off air. Imagine a situation were, barge was anchored between two flare units.Reasonably practical solutions were provided & workforce were happy with.I think it was at Oso
At time, basket transfer was at 60 feet above water level through mounted crane. But, when transfer were through barge crane it is safe by sheer operation of the operator.Because both the crane & the object onwhich to be transferred were floating and in continuous motion.By skillful manaevouring of tug-boat and crane, basket was used.There does not end transfer.Even worse and dangerous was taking a swing rope to platform. It needs a good training & mental make-up.A slip may end, on both the side, the passenger in water.Be aware that tug-boad floats in water and waves break at landing platform. Now imagine how the environment could be.
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Imagine! when water break at an object in sea, the force it creates. Especially,entaining or detraing the raft from barges/work-boat is always through ladders.When ebb was high, you are high but you never know when it will go down for ebb. All of a sudden you are at 4-5 feet down loosing grip with ladder. Either, you hit some structures near-by or tumble into water gulping few salty drops.Is it not thrillsome.?
Detecting the holidays and removing the pinholes proves effetive coating maintenance.Holidays acts as viable media to penetrate
corrosion.Outer coat may look fine but these holidays allow oxygen and increase rate of oxidation.Particularly, its needless
to say in water.Its a paramount job to detect pinholes & improve corrossion monitoring methods.
Surface preparration to NACE standard was crucial to application of clads. Achieving the required standard by suitable grit size, pressure was an another problem. Grit gets moistured, surface get wet. Weather conditions were not congenial.Bonds were mixed and suitably applied. To maintain the VOC level of chemicals used was really difficult job- eventhough the operation was in open-air.Boxing time was very short, application needed extreamly meticulous plan.
Throwing life boat during man-over board during ERP (Emergency Rescue Plan)used to be routine.Deck watch rehearsed atleast once in week.Male nurse or medical practitioner carried out sebsequent inspection for the victim.Helicopter rescue was also one of the scenario.
In the wider open sea, radio beacon(EPIRB),radio & helicopter were the only communication tool.Life boat, raft ,tug boat were means to survive but those equipment help survive from unforseen clamities like fire,explosion,storm or abandon platform/barge.Beacon when come in contact with water emits signals to nearest radar screen placed on-shore/ship close-by sailing.SOS message are usualy sent through Radio-sets which is heared all over in the emergency channel.Listener near-by tend to rush for help.
Emergency helicopter services were ready on errand.Helicopter emergency rescue & escape was taught to all employee.Water survival is purly an individual skill in the event of emergency.Radio set,radar were tuned 24 hours.Pre-boarding helicopter & use of emengency equipment on board was briefed everytime when they board.Also, adequate number of emergency rescue kit was equiped in all barges/ship.ERP was part of Station Bill.
Main supply unit (i.e), risers are generally in splash zone. Repair normally pose exceptional problem. May be dent/loss of metal or replacement.Stipulated AWS,SSPC(NACE)standard adherance in repairing is a himalayan task, demanding high skill & experience in application.Parameter such as Humidity,Moisture,Temperature ia always present.Even divers needs high precision to determine the riser repair.Moreover it demanded high energy from all involved.Constant waves sweeping enabled even the scaffolders a diverse problem when erecting.Most of the time they were immersed in water.Hypothermia usually a problem experienced by divers.Hyperbaric chambers were used to treat them as per PADI dive-table.
Installed Cofferdam when repair were in splash zone - 3 m,Artificial ventilation, gas testing was carried out.Emergency rescue kits were positioned as per procedure, when repairing with cut & replacement.Normally divers fitted cofferdam for the work.
Underwater welding involves different safety precautions that challenge the underwater welder. In wet welding, the diver must prevent shock hazards because underwater welding requires direct current (DC) power supply, not altnerating currents (AC). Underwater welding also requires a knife switch to stop the current when the underwater welder is not welding. Wet welding requires special wet welding electrodes and electrode holders exclusively designed for underwater welding. The underwater welder also wears a rubber dive suit and gloves to avoid shock and welding lenses to filter the ultraviolet rays.
Mis-match,Hi-Lo of metal, Under-cut, Inclusion (slag,wagon track,hydrogen,sulphur,any such items),Poor lap ( over-lap / under lap),Poor fusion,Burnt off(poor electrode/poor selection of current)cause poor welding & makes metal integrity less than the original.Such things assure poor safety in pressurised vessel and leads to unexpected HCA(High consequence accident).Its para mount importance to ensure good weld for safety.
Share some of my interests? Just want to start a correspondence? Please get in touch!
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