Feature 3 | TANKER REPAIRS UMC carries out tanker insert repair
A damaged tanker was able to set sail again quickly, thanks to insert repairs carried out while the ship was at anchorage in the UK.
U
nderwater repair specialist, UMC International, was recently contracted to assist with
permanent insert repairs to a tanker at Portland Inner Anchorage in the UK. An experienced UMC team was quickly on site to carry out an immediate underwater inspection of the damage, in conjunction with a Testbank Afloat Repair Team and a DNV class representative. Te inspection uncovered the need for
extensive repairs to the tanker, requiring a total of seven shell-plating inserts to be carried out. A repair procedure was devised and project managed by UMC marine engineers with the underwater placement of steel cofferdams to allow defective sections of shell plate to be removed and replaced. UMC cofferdams, including a 500kg, 3m
x 600mm cofferdam that could efficiently cover three of the cracks, were specially designed and fabricated. Once in situ, and the area confirmed to be a dry habitat by the UMC dive team, the internal repair crew cut away the longitudinal stiffeners and the defective sections of shell plating. Testbank welders repaired the cracks utilising a single
A UMC diver installs an insert repair on a tanker while at anchorage at Portland in the UK.
sided weld procedure with ceramic backing strips on the outside of the hull. Te new inserts were then welded in position utilising constant flux core MIG welding. After allowing a 12-hour cool down
period NDT (non-destructive testing) inspection of the welds was carried out and all inserts were found to be free from faults. On completion of successful
NDT, divers removed the cofferdams and carried out a CCTV inspection of the external weld cap. Tey then applied an underwater epoxy paint over the entire insert plate and weld cap. UMC engineering director, Dave
Richards comments: “Tese type of afloat insert repair procedures allows the vessel to sail in good time and help reduce repairs at their next dry docking. We have project managed and completed many insert repairs from our operational hubs around the world and designed a variety of heſty cofferdams, some weighing over 10tonnes” UMC continues to broaden its global
reach, setting up new offices and extending its partner network. In 2009 UMC established new offices in Singapore and Bahrain and can now offer underwater maintenance services at over 50 key locations globally. At the core of this global maintenance network is the Mini Pamper hull cleaning network. Te latest Mini Pamper system, installed in Abidjan, on the Ivory Coast of West Africa in early 2010 is the 20th station to operate the Mini Pamper system. SRCT
Teekay awards tanker fleet management software contract
Teekay has contracted ABS Nautical Systems to help manage its tanker fleet’s drydocking needs.
T 38
anker operator Teekay is to replace its management soſtware system, implementing the maintenance
and repair, purchasing, inventory and drydocking modules from ABS Nautical Systems’ soſtware suite - NS5.Te modules will initially be installed on Teekay’s existing fleet of 21 shuttle tankers and two newbuildings. Te Drydock module integrates drydock
planning and maintenance activities into the NS5 Maintenance and Supply
Chain Management systems. Whether used alone or in conjunction with the NS5 Maintenance and Repair module, the programme offers a standardised method for drydock planning, budgeting and document preparation across an entire fleet. Trough the completion of daily work tasks performed by crew or outside contractors, the Maintenance and Repair module generates a comprehensive, planned machinery and vessel compartment maintenance history,
both for routine planned maintenance or those associated with special projects and events. According to ABS, the Reliability
Centred Maintenance (RCM) features within the Maintenance and Repair module categorise system failures and record time to repair. Built-in analysis tools give the operator critical information for making maintenance management decisions that can reduce unplanned downtime. SRCT
Shiprepair and Conversion Technology 2nd Quarter 2010
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