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Alexander kielland wreck by wwy yrj
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Alexander kielland wreck |
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Business,Business News,Business Opportunities
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Fractures onto the right side of the rig
In giving the pressure rain and mist, early inside the evening moment time of 27 March 1980 numerous than 200 men were off duty inside the rental accommodation onto the Alexander Kielland. The wind was gusting inside the direction of 40 knots with surf higher towards 12m high. The rig had just been winched away from the Edda presentation platform.
Minutes ago 18.30 those onto board felt a 'sharp crack' pursued via 'some manner of trembling'. Suddenly the rig heeled through thirty and else stabilised. Five of the 6 anchor cables had broken, the one stellar curly cord deterring the rig from capsizing. The register progressed inside the direction of motivate and at 18.53 the remaining anchor cabling clicked and the rig swung upside down.
130 men were inside the disorder hall and the cinema. The rig had seven 50-man lifeboats and 20 20-man rafts. Four lifeboats were launched, but alone one stared within the direction of sack from the decreasing cables. (A protection creations did not allow publish until the injure was removed from the cables.) A fifth lifeboat came free and appeared upside down; its occupants righted it and saved 19 men from the water. Two of Kielland's rafts were detached, three men being liberated from them. Two 12-man rafts were hurled from Edda and rescued 13 survivors. Seven men were stole from the marine waters via give ships and 7 swam inside the direction of Edda.
No-one was rescued via the standby pot which took an hour towards stretch the scene.
Of the 212 population aboard 123 were killed, generating it as of 2007[update] the harshest disaster inside Norwegian offshore history since WWII. Most of the domestics were from Rogaland.
Part of the bracing that malfunctioned all through the accident. At demonstrate within social inside The Norwegian Petroleum Museum.
A year later inside March 1981, the investigative inform accomplished that the rig softened is indebted inside the direction of a fatigue chink within one of its six bracings (bracing D-6), which united the slipped D-leg towards the lie down of the rig. This was traced inside the direction of a slight 6mm fillet weld which collaborated a non-load-bearing flange plate towards this D-6 bracing. This flange plate held a sonar innovation acclimatized during drilling operations. The destitute profile of the fillet weld contributed towards a decrease inside its fatigue strength. Further, the scrutiny heard princely allowances of lamellar shredding within the flange plate and chilled chinks within the butt weld. Cold breaches inside the welds, expanded tension concentrations due within the direction of the diminished flange plate, the poor weld profile, and cyclical stresses (which would be ordinary within the North Sea), emerged towards collectively play a employment within the rig's collapse.
The rig was regained inside 1983 at the third attempt. It was scuttled every time that year whenever a examination for lacking bodies had been completed, as well as some investigates to determine the impose of the disaster. The fatigue chink had grown over time from a hydrophone dock inside the bracing tube. Judging via decorate onto fraction of the fractured covering the crack was most probably due to unsuitable occupation at the plant within Dunkerque, France while the rig was built in 1976.
Other main functional segments then malfunctioned in sequence, destabilising the total structure. The comprise of the rig was flawed be obliged to the absence of structural redundancy.
A aftermath of the Alexander Kielland emergency was the squeezing of instruction association higher higher onto offshore installations in the North Sea in order that there was a rid inflict of management for rating abandonment in crises. The 14 minutes between original malfunction of the base and the rig's eventual capsize retreated a window in which most of the employees on board could own escaped, allocated a numerous efficient instantaneous structure. But it would appear that nobody took ascribe on the night. These edited manoeuvre constructions (more akin to plural habitual vessels command structures) are already often stationed into utilisation after pans lose anchorage in squall situation or whenever fixed installations are imperilled via out-of-control vessels.
Not stretched after the Alexander Kielland rig capsized its sister rig Henrik Ibsen bent over, but it was made straight up again.
Approximately 18 months subsequent the Ocean Ranger rig capsized in same conditions status off the Newfoundland coast. An analysis into the determinants of the Ocean Ranger catastrophe by the US Coast Guard deployed that structural failure was not a factor.
Understanding Systems Failures, Ch. 5, Bignell, V & Fortune, J (1984) ISBN 0-7190-0973-1
The Alexander L. Kielland accident, Report of a Norwegian communal commission nominated by regal decree of March 28, 1980, introduced to the Ministry of Justice and Police March, 1981 ISBN B0000ED27N
An animation by Failure Analysis Associates (now Exponent)
Website claiming the misadventure was an quit of sabotage
Oil rig disasters files and descriptions
Welding Institute labour on disaster
World's Most Disastrous Hardware Failures I am China home garden manufacturers writer, reports some information about soft toy making , battery operated cash register.
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soft toy making, battery operated cash register,
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