GPK, UAE contracted Albwardy Damen to pull out all the three legs of their lift-boat, Kingfish and renew the damaged racks.
Scope: To pull out all the three legs and renew the damaged racks
Timing: Jan 2018 – April 2018 (25/01/2018 –29/04/2018)
Class: BV
Major highlights: Completed within and as per the contract to full satisfaction of owner and DNV-GL, without being even a single first aid case reported.
GPK, UAE contracted Albwardy Damen to pull out all the three legs of their lift-boat, Kingfish and renew the damaged racks.
Work carried out:
Pulling out the legs and rack renewal
Lift out all the three legs (135 tons approx. each leg) using 600ton crawler crane
Erect staging on either sides of all the legs
Degrease and hydro-blast the legs
Carryout survey and prepare reports on the condition of the racks
Finalize the damaged racks that needs to be renewed with the owners and class (more than 200m of racks renewed)
Crop out, prepare the surface, fit-up the new racks, match the timings with the existing racks, pre-heating, welding, post weld heat treatment and NDT
Calibrate the legs and leg towers and finalize the size of the shims in the towers and renew accordingly
Lift back the legs and insert through the tower and weld to the pads and NDT
Putting back the leg after repairs
Other repairs
Kingfish sustained a grounding before arriving the shipyard resulting major damage to the skeg, rudder, propeller and A-frame and tail shaft. Following repairs were carried out.
Tail shafts were pressed with hydraulic jacks on the lathe machine to bring back the straightness to the allowable limits
A-frames were cropped together with the skeg, realigned, line bored the A-frame and new buses were fitted. Skeg was completely renewed
Propellers were repaired, pitch corrected and balanced
Damaged portion of the rudder blades were renewed
Single lengthy rudder stock was redesigned to flanged type and modified accordingly
All the above works were done in line with class approved procedures