On-Site Flange Facing For Deck Crane Pedestal Flange
Crane post flange surface renewal for bulk carrier in China
During a short, scheduled dry-docking at COSCO Guangzhou in China, the operator of the Capetan Vassilis, a 10-year-old bulk carrier, encountered unforeseen damage on one of the deck crane pedestal’s 2.75-meter diameter flanges.
The operator immediately approached Goltens to inspect the problem and work together with the shipyard to propose a repair solution for the crane. Goltens’ on-site machining specialist evaluated the condition and proposed a work schedule that met the time constraints of the docking.
A repair procedure was issued by Goltens and approved by the customer and class. As the dry docking schedule was short, Goltens modified its flange facing machinery and tooling to suit a vertical machining application before order confirmation. Upon confirmation, Goltens immediately dispatched its laser alignment equipment and machining tools and technicians to the shipyard in Guangzhou.
MV Capetan Vassilis
Deck crane installed onboard the bulk carrier
Crane pedestal laid horizontally for inspection
Installation of flange facing machine on pedestal
Flange facing in process at Guangzhou COSCO shipyard
PROJECT FACTS
| CAPETAN VASSILIS | |
|---|---|
| Customer: | Saint Michael Shipping Co., Ltd |
| Vessel Type: | Bulk Carrier |
| Tonnage: | 51,196 DWT |
| Flange Diameter: | 2,755.00mm |
| Machined Surface: | 120mm |
IN-PLACE FLANGE MACHINING CONSISTED OF
- Performed laser flatness checks on crane post flange number 2
- Performed vertical on-site flange facing machining 3.5mm from the crane pedestal flange surface
- Performed post-machining laser flatness checks confirming flatness within 0.15mm.
ON-SITE MACHINING RESULTS
Goltens technicians completed this job within 2 days to keep up with vessel’s short dry-dock schedule.
The result was excellent and was approved and accepted by the Crane OEM supervisor, the class surveyor and the shipyard QC officer.
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