Demonstration of annealing process Mitsubishi invited Goltens to demonstrate its annealing process on a crankshaft that had been intentionally hardened for the demonstration in its factory in Yokohama, Japan. Goltens technicians traveled to the factory and, following its GL-approved process, …
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PROJECT FACTS METAL STITCHING Engine Model: MaK 12M282 Vessel Type: FPSO Engine Output: 2,400KW RPM: 1,000 RPM METAL STITCHING REPAIR Full inspection of the damaged block Removal of damaged portions of the block – leaving a clean surface to stitch …
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PROJECT FACTS Engine Make/Model: Mitsubishi 6UEC85LS-II Engine Output: 22,432 kW Original Crankpin Diameter: 950.00 mm Distance between Webs: 335.00 mm Finished Crankpin Diameter: 940.00 mm DAMAGED JOURNAL REPAIRS Hardness check and crack test via Magnaflux on No.1 crankpin journal Machining …
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PROJECT FACTS MAN B&W V9V40/54 Crankpin Diameter: 320 mm Pre Annealing Hardness: 630 Brinell Post Annealing Hardness: 320 Brinell Finished Crankpin Diameter: 316 mm (-4.0mm) CRANKSHAFT ANNEALING AND MACHINING REPAIRS Machining of new fillet radii Magnaflux crack testing and Hardness …
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PROJECT FACTS HAI FENG 618 Vessel type: Refrigerated Cargo Ship Tonnage: 7,934 DWT Main Engine: Mitsubishi 6UEC52LA Power: 7,061 KW IN-PLACE MACHINING AND DIESEL REPAIR SCOPE Machining Cylinder No. 1 FWD & AFT guide rail port side to -2.50mm undersize …
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IN-SITU MACHINING PROJECT FACTS Engine: Vasa 18V32 Engine Output: 5,800kW RPM: 720 RPM Original Crankpin Diameter: 269.00 mm Finished Crankpin Diameter: 267.00 mm Distance between Webs: 210.00mm WARTSILA CRANKSHAFT REPAIRS Machining new fillet radii Machining and superpolishing crankpin journal …
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PROJECT FACTS M/E CYLINDER LANDINGS Vessel: M/V HONG XIANG JUN Engine: PIELSTICK 12PC2-5V, 4 units×5360KW Tonnage: 3943 DWT Dredge Capacity: 4,500m3/h REPAIRS Flatness checking of No. 4, 5 and 6 cylinder covers with laser equipment RESULTS Goltens technicians completed this …
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PROJECT FACTS Sulzer 8 ZAL 40S Engine Output: 5760kW RPM: 514 RPM Original Crankpin Diameter: 350.00 mm Distance between Webs: 180.00mm Finished Crankpin Diameter CP3: 342.00 mm Finished Crankpin Diameter CP1: 347.00 mm SULZER 8ZAL 40S REPAIRS Machined new fillet …
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PROJECT FACTS MV QUEEN OF BURNABY Engine Type: Mirrlees National Engine Model: KVSS M16 V-Type Number of Journals: 8 Original Diameter: 266.70mm Finished Diameter: 265.18mm IN-PLACE MACHINING CONSISTED OF Performed Magnaflux crack test and hardness tests on all crankpins Performed …
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The vessel owners consulted the engine maker and presented the method for proposed repair. After consultation with the makers, the vessel owners were informed by the makers that this type of repair was “not possible In-situ”. Despite this adverse opinion, …
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PROJECT FACTS Engine Make/Model: MAN B&W 9K80MC-S Engine Output: 41,670 kW (103 Rpm) Crankpin Dia. Pre machining: 896.00mm Crankpin Dia. Post machining: 891.00mm REPAIRS TO CRANKPINS Full NDT inspection (Magnaflux and Hardness) Machining of new fillet radii Machining of crankpin …
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PROJECT FACTS Wartsila 6RT-FLEX 50B Weight: 55tons Crankshaft Length: 7560 mm Throw: 2850 mm Journal Diameter: 600 mm Crankpin Diameter: 600 mm REPAIRS Assessment of fillet radii (which are normally out of line due to the shaft manufacturing process) Grinding …
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PROJECT FACTS Wartsila 6RT-FLEX 50B Weight: 55 tons Crankshaft Length: 7560 mm Throw: 2850 mm Journal Diameter: 600 mm Crankpin Diameter: 600 mm REPAIRS Assessment of fillet radii (which were out of line due to the shaft manufacturing process) Machining …
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THE DECISION Goltens machined the crankshaft to -4mm and to evaluate the condition of the shaft. It was determined that the hard spots did not lessen – in fact, they became worse. All of the surface cracks were removed, with …
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The customer decided to cut another -2.00mm to see if the hard area would get smaller and the hardness values would get lower. At diameter 346.00mm the hardness values and area were still out of the engine maker’s specifications. Goltens …
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IN-SITU ANNEALING PROJECT FACTS Caribe Mariner Ship Type: Container Ship Engine Make: MaK 8M32 Engine Output Mcr: 3,380kW/4,595HP (600RPM) Crankpin Diameter (Original): 280.00 mm Crankpin Diameter (Finished): 278.00mm Max Hardness pre-Annealing: 650HB Max Hardness post-Annealing: 308HB CRANKSHAFT AND JOURNAL REPAIRS …
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PROJECT FACTS French Guyana Powerplant Engine Make/Model: Pielstick PC2.5 18V Crankpin Dia. Pre machining: 315mm Crankpin Dia. Post machining: 312mm Max Hardness before Annealing: 647hB Max Hardness after Annealing: 325hB REPAIRS Full NDT inspection (Magnaflux and Hardness) Machining of crankpin …
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PROJECT FACTS Mexican Paper Mill Engine Make: Wartsila W18V32 Engine Output: 6,746 kW at 720 RPM Crankpin Diameter (Original): 310.00 mm Crankpin Diameter (Finished): 307.00mm Max Hardness pre-Annealing: 650HB REPAIRS Removed 1.50 mm from crankshaft prior to annealing Annealed the …
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PROJECT FACTS PIELSTICK 10PC 4.2V Vessel type: Fleet Replenishment Oiler Orig. Crankpin Diameter: 465.00mm Material Removed: 2.00mm Post Annealing Hardness: <300 Hb PIELSTICK ANNEALING AND MACHINING PERFORMED Inspected the crankshaft – performing run-out, Magnaflux and hardness checks on the shaft …
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PROJECT FACTS WARTSILA 18V46 Location: Dominican Republic Power Output: 17,550 @ 500rpm Original Crankpin Diameter: 450.00mm Material Removed: 4.00mm Pre/Post Annealing Hardness: >600Hb/<350 Hb WARTSILA 18V46 ANNEALING AND MACHINING WORK PERFORMED Inspected the crankshaft – performing run-out, Magnaflux and hardness …
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ANNEALING PROJECT FACTS Panamanian Power Plant Engine Make/Model: Wartsila W18V46 Engine Output: 10,000 HP Crankpin Dia. Pre machining: 450.00mm Crankpin Dia. Post machining: 447.00mm Distance between Webs: 450.00mm DIESEL GENERATOR REPAIRS Full NDT inspection (Magnaflux and Hardness) Machining of crankpin …
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PROJECT FACTS BEN KIEN SHIPYARD Vessel: M/V 9200T-03 Rudder stock Length: 4.610m Rudder stock diameter: 300/400/545/350mm Rudder stock weight: 9500 kg Machined length of Shaft: 770mm WORKSHOP REPAIRS Rudder stock cleaned & measured (before & after repair) Completed alignment check …
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Goltens milled out the damaged area and completed post machining dye penetrant checks to ensure that 100% of the damage had been removed. Goltens fashioned a template of the damaged area and fabricated an insert that was machined to fit …
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PROJECT FACTS FPSO KNOCK ADOON Tonnage: 244,492 DW Engine / Equipment: Siemens KKK AFA 6 G6a Turbine Output: 2.5 MW RPM: 11,543 RPM IN-SITU REPAIRS Removal, lifting of the whole skid weighing ~30 tons Manufacturing and installation of new steel …
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PROJECT FACTS STERN TUBE BEARINGS Tonnage: 298,555 DWT Shaft dimension: OD: 741.00mm × L: 1630.00mm Year Built: 2003 BEARING REMETALLING AND MACHINING REPAIRS Inspection of aft and forward stern tube bearings after removal old damaged white metal bearing material STERN …
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