Goltens was engaged to inspect the main-engine crankshaft on a 23-year-old, 11,700-dwt chemical/product tanker anticipating that the crankshaft could be salvaged with in- situ machining.
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A Chinese PTA chemical plant, with 1.5 million tons of annual production, was undergoing an emergency overhaul on a large multi-axis air compressor critical to plant production. Due to the criticality of the compressor, the plant was pressing for the shortest possible completion.
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A 12-year-old container ship was undergoing dry docking in China when issues with the main engine shafting were discovered. The coupling bolts for the flywheel and the intermediate shaft had elongated and been worn to an oval shape and there was 0.5mm clearance between the flywheel and intermediate shaft landing surfaces.
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After preliminary meetings and discussions on the tolerances of the bush and tube Goltens proposed a combination of on-site and workshop efforts to complete the work. ON-SITE WORKSCOPE Port and Stbd. Bore alignment laser checks In-situ line boring of Port …
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Read about how Goltens executed a detailed solution using its traditional in-place machining coupled with a low surface temperature laser cladding technology. To prove out the viability of the proposed repair, the repair process was tested on a scrap valve in …
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THE INSPECTION AND THE PROPOSAL During the inspection, Goltens learned that the engine had suffered the same casualty on the same cylinders 30 years earlier. The block had significant damage to the crankcase near the doors, liner landings and the …
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THE BIOWAVE™: The bioWAVE™ ( http://www.biopowersystems.com/ ) is being developed for utility-scale power production from ocean waves. Its nature-inspired design (biomimicry) combines high conversion efficiency with the ability to avoid excessive wave forces, enabling supply of grid-connected electricity at a …
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To ensure the bores were all in perfect alignment and the flanges were perfectly flat, Goltens used the latest in laser alignment and flatness-checking equipment. On the largest of the flanges, Goltens’ 3m x 3m X/Y milling equipment had to …
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Goltens evaluated the challenge and presented Andritz with a proposal for the completion of the complex job. Goltens in-situ technicians modified their existing tooling to accommodate the requirements by fabricating a rail that followed the exact radius of the curved …
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PROJECT FACTS MV VTC OCEAN Engine Type: Yanmar 6N18-UN Output: 450 KW Vessel Type: Bulk Carrier YANMAR DIESEL REPAIR WORK SCOPE Complete cleaning and inspection of engine block Complete cleaning and inspection of crankshaft at workshop Repaired the badly damaged …
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PROJECT FACTS GUAM POWERPLANT Engine Maker: Doosan Korea Engine Model: MAN B&W 12K80MC Main Bearing Pocket Diameter: 992mm REPAIRS Assessment and laser alignment check of the all main bearing pockets. Correction of the main bearing pocket horizontal contact landings in …
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PROJECT FACTS MAHABBAH Vessel Type: Passenger Vessel/Ro-Ro Main Engine: 2 x Pielstick 18PC2V-400 Vessel Tonnage: 1,968 DWT Shaft Diameter: 460mm STERN TUBE BORING REPAIRS Calibration & Alignment checks Port/Starboard stern tubes Line boring of Port & Starboard Stern Tube sections …
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PROJECT FACTS DRYDOCKING OF 3 CREW & SECURITY VESSELS Vessel names: ANSAR 4, 6 and 13 Vessel sizes: 35 M overall lengths Engine types: MTU (A 4 & 6) and CUMMINS (A 13) Company: Red Sea Marine Services Location: Dubai, …
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LINE BORING PROJECT FACTS Stinger Hinge Machining Internal diameter of bore: 1350 mm Distance between hinges: 8 meter ± 1.5mm Length of the bore: 600 mm Number of hinges machined: 2 Tolerance of the internal diameter: H7 HINGE PIN REPAIRS …
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PROJECT FACTS Octagonal FDPSO N262 Max working depth: 3000 meter Storage Capacity: 160,000 barrels Fairleader diameter (pre): 651.00 Fairleader diameter (post): 652.50 Fairleader Sets: 13 sets of 3 bores ON SITE LINE BORING REPAIRS Alignment checking of 13 sets of …
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PROJECT FACTS LEAKING PROPELLER SHAFT SEAL Diameter of flange: 1200 mm Tolerance of flange flatness: ±0.05 mm Machined Length: 130 mm Number of flanges machined: 1 REPAIRS Inspection and isolation of leak Laser alignment of propeller shaft line Welding of …
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PROJECT FACTS STERN TUBE BORING Vessel: M/V Cape Engine: MAN B&W 6S60MC (8,679KW) Tonnage: 73,049 DWT FWD Inside Dia X L: 658.00mm X 1250mm (+4.03mm) AFT Inside Dia/Length: 660.00mm X 660mm (+6.00mm) STERN TUBE HOUSING REPAIRS Full inspection and …
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PROJECT FACTS DRILL SHIP LINE BORING Thruster Manufacturer: Roll Royce Year Built: 1975 Vessel Tonnage: 7,403 DWT Housing Dimension: ID 1270 mm Max Water Depth: 7,000ft Max Drilling Depth: 25,000 ft IN-SITU LINE BORING CONSISTED OF Customized line boring tools …
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Taper boring tool design and manufacture The job required the design and manufacture of special boring tools to complete the job. Goltens In-Situ machining engineers developed the G2000, a large scale machine capable of handling both line and taper boring …
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PROJECT FACTS Line Boring of Jack up Crane Original Bore Diameter: 217mm Final Bore Diameter: 227mm Number of Bores completed: 12 REPAIRS In-Situ line boring of 12 locking pin bores. RESULTS The initial project scope was for Goltens to complete …
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PROJECT FACTS Engine: SULZER 16ZAV40S Pocket Diameter (Pre-machining): 480 mm Pocket Diameter (Post-machining): 490 mm Pockets Machined: 11 of 16 REPAIRS Dismantling of cylinder head, piston and connecting rod, cylinder liner and accessories to provide access for In-Situ Line Boring …
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PROJECT FACTS Vessel dimensions: 175 x 30 Vessel deadweight: 31,434DWT Rudderstock sizes: 8m x ø750, 12 Ton Rudder sizes: 10x3m, 15 Ton REPAIRS Workshop machining of 1:15 taper rudderstock and restoration of oil and o-ring grooves Fabrication of stepped bush …
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ENGINE INSPECTION/DAMAGE ASSESSMENT: The inspection revealed that the crankshaft was damaged beyond repair and would need to be replaced. The damaged crankshaft was skidded out from the engine and further inspection of the main bearing showed signs that the crankshaft …
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Goltens’ specialists started the work by dismantling and extracting the 80-tonne engine block from an existing power plant in a rural location in the Philippines. At this stage, visual inspection and nondestructive testing were performed to confirm suitability of the …
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The Planning Goltens performed an on-site inspection and reviewed AutoCAD drawings of the engine room and overlaid the dimensions of the 9 meter/15 ton replacement crankshaft along the potential route. The evaluation showed that there would be just enough space …
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