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NMF deck cranes removal and reinstallation
 

Alatas Americas was contracted to remove an NMF crane tower and pedestal to facilitate the loading of oversized cargo (cold storage boxes). Due to the size of the “cold boxes” the overhang of the NMF aft crane hindered in the loading of the cargo.

The NMF crane and pedestal removal was carried out in the Port of Houston, with the reinstallation to be carried out approximately 60 days later. All work was to be carried out as per NMF crane manufacturer’s standards and by GL certification and overload testing verification.

 

NMF crane removal gallery

   
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NMF crane prior to removal

NMF crane scaffolding setup
Adverse weather conditions in Houston
     
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NMF crane removal

NMF crane removal
NMF crane removal
     
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NMF crane boom removal

NMF crane removal preparations

NMF crane removal
     
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NMF crane removal

NMF crane removal

Pedestal cutline marked and removed shoreside
     
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Pedestal cutline marked and removed shoreside
NMF crane removed to allow coldbox to be carried
NMF crane removed to allow coldbox to be carried
     
     
NMF crane replacement gallery    
     
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Pedestal edge preparation work
Pedestal edge preparation work
Boom and pinions brass sleeves preparation
     
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Boom and pinions brass sleeves preparation
Pedestal and boom transported to vessel
Pedestal and boom transported to vessel
     
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Pedestal and boom transported to vessel
NMF crane pedestal lifted onboard
NMF crane pedestal welded into place
     
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Pedestal welded into place as per NMF procedures and inspected by GL Surveyor
Pedestal welded into place as per NMF procedures and inspected by GL Surveyor
Pedestal welded into place as per NMF procedures and inspected by GL Surveyor
     
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Ultrasonic testing carried out on welded
seam as per GL Surveyors request
NMF crane moved inside hold as vessel had to move to different berth
Scaffolding constructed to provide working
platform around pedestal slew bearing
mounting machined surface
     
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After pedestal was welded, laser
flatness check carried out on pedestal
slew bearing mounting surface
After pedestal was welded, laser
flatness check carried out on pedestal
slew bearing mounting surface
After pedestal was welded, laser
flatness check carried out on pedestal
slew bearing mounting surface
     
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Click to expand
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NMF crane lifted from hold
and refitted onto pedestal

New slew bearing bolts installed and
torqued to manufacturers standards
New slew bearing bolts installed and
torqued to manufacturers standards
     
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Click to expand
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NMF crane electrics refitted through
pedestal onto electrical connection
posts and slipring reconnected
NMF crane electrics refitted through
pedestal onto electrical connection
posts and slipring reconnected
NMF crane wire ropes refitted
     
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NMF crane wire ropes refitted


NMF crane overload lifting and
functional tests carried out as per
attending GL surveys instructions
NMF crane overload lifting and
functional tests carried out as per
attending GL surveys instructions.
     
 
 
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