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All Case Studies
Massive Controls Upgrade Project in Philippines
Goltens was engaged to evaluate the current controls configuration on two Therma Mobile inc. Oil-fired floating power barges and propose a solution to both increase the efficiency and reliability of startup and operations while also meeting strict NGCP (National Grid Corporation of the Philippines) regulations for ancillary power load response.
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MAN 6L35MC Main-Engine Crankshaft Replacement Minimizes Downtime for Chemical Tanker
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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In-Situ Laser Cladding and Machining Restores Chinese Chemical Plant to Operation
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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Remetalling and Machining Restore Agitator Shaft
A polyester plant in Indonesia was planning a shutdown in four weeks and suspected that the polyester reactor’s 285mm diameter agitator shaft was damaged and would require repair during the maintenance window. The maintenance window was short, and the extent of the repairs required was unknown.
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Four Wartsila 12V50DF Overhauls in Only 14 Days
Goltens Singapore was engaged by a Singaporean shipyard to undertake an engine overhaul project on a 9-year-old LNG tanker with a tight timeline. The yard required four Wartsila 12V50DF auxiliary engines to be overhauled in only 14 days.
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Simultaneous Machining of Crankpins Speeds Repair
During periodic maintenance, the crew of a 14-year-old, 122,000 DWT container vessel, noted excessive wear and ovality on five of the six crankpins (#2 through #6) on one of their Wartsila W6L32 auxiliary generators. Crankpin #1 had previously been machined to undersize and did not require repair. The vessel owner contacted Goltens about undertaking the further inspection and rectification of the worn crankpins.
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Daihatsu Crankshaft Replacement for Cement Carrier
A 10-year-old cement carrier suffered a main engine bearing failure on its Daihatsu 8DKM28 engine. The OEM was contacted by the client to inspect the damaged crankshaft and the OEM determined it was beyond repair and required replacement.
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“Smart Box” Solution Reduces Woodward 3161 & UG8 Upgrade Time And Cost
To address the operational requirements, simplify the design and reduce the time required for the retrofit, Goltens again used its “Smart Box” that converts the existing 3161 or UG8 engine wiring directly to the UG25+ configuration. The use of the Smart Box makes the conversion fully plug and play without having to consider additional wiring or complex configurations.
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Mechanical & Electrical Restoration – Fire Damaged Containership
A 13-year-old, 35,555 DWT, Container Ship experienced a shipboard fire on its #3 Yanmar 6EY26L auxiliary diesel generator causing significant mechanical and electrical damage to itself, the adjacent #4 DG, and the engine space as a whole. As a result of the fire, the vessel lost power, use of the aux boiler and main propulsion for an extended period.
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Steam Turbine Rotor Shaft Machining – Indonesia
Goltens received an urgent call from a power plant in the city of Gorontalo in Sulawesi. The plant’s 10MW Shandong Jinan steam turbine suffered a bearing failure resulting in a damaged rotor shaft. The power plant is a vital source of power to the city and minimizing downtime was critical.
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In-Place Metal Stitching Salvages Another Badly Damaged Engine Block
An 11-year-old container vessel suffered a major casualty on one of its Yanmar 6EY26L auxiliary engines resulting in pieces of the connecting rod breaking through the crankcase wall causing extensive damage. Knowing how operationally disruptive and exceedingly expensive a block replacement would be, the owner contacted Goltens Dubai to inspect the damage and determine if the block could be salvaged.
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Multi-Station Cooperation Leads to Another Efficient BWTS Retrofit Installation
A European tanker owner approached Goltens Green Technologies in The Netherlands to support the retrofit of an Alfa-Laval Pure Ballast BWTS system on their 6-year-old, 50,000 DWT, Chemical/Products Tanker.
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Woodward easYgen Hybrid Solar Diesel Power Management Solution
The feasibility, efficiency and availability of solar panels worldwide make the transition to renewable sources easy and cost efficient. To reduce fuel consumption and CO2 output, a small self-powered island, which met its power requirements by running Diesel Generators, installed two solar systems to capitalize on the abundant solar energy available in the UAE.
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Multi-Station Execution Of Optimarin BWTS Retrofit
Optimarin initially engaged Goltens Green Technologies to undertake the 3D scanning, basic design and detailed engineering package for the retrofit installation on a 10-year- old, 37,000 DWT cargo vessel.
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Annealing And Machining Salvages Another Badly Damaged Crankshaft
Goltens was contacted by a containership operator to inspect damage on its MAN 9L 48/60 main engine crankshaft. During operation, the main engine’s connecting rod bolts gave away and caused major damage to crankpin number 4. Goltens boarded the vessel at Dubai Maritime City for inspection.
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Himsen 6H25/33 Crankshaft Replacement – Singapore
Goltens received a call from the operator of a nine year old crude oil tanker about damage to one of its three HiMSEN 6H 25/33 diesel generator sets. The engine had recently undergone routine overhaul but during operation, the engine went to overspeed and triggered a shutdown.
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In-Place Machining Solution Resolve Shafting Issue
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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Woodward 2300E Controller Retrofit For Offshore Vessel
Goltens was engaged by the owner of an offshore supply vessel to upgrade two medium speed engines operating with obsolete Woodward 723Plus controllers.
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Two More Turnkey Techcross Bwts Retrofits By Goltens
Having completed successful ballast water retrofitting of one of its LNG Carriers, Goltens Singapore was once again contracted by one of the world’s largest LNG owners and operators to complete similar turnkey retrofits on two 15- year-old, 83,000 DWT LNG carriers.
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Laser Cladding And Machining Salvages Slurry Pump Shaft For Mine
A mining operation suffered a major bearing seizure on the crankpin of a slurry pump shaft. The pump makers approached Goltens to explore the possibility to repair and restore the crankshaft to original diameter in our workshop.
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The Price Of Saving Money On Woodward Service
Goltens acquired a “serviced” UG15D governor from a governor repair shop claiming to be Woodward authorized. Physically the governor looked like a UG15D however after further inspection was found to be only partially serviced and rebuilt with incorrect parts and worn parts.
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Liner Diameter Measurement (LDM) on 6RT-FLEX82C
The crew of a nine year old container ship, equipped with a Wartsila 6RT-FLEX82C main engine, observed exhaust gas blow by on cylinder #5 during normal operation and could not increase the load above 35%. The cylinder liner had 22,452 running hours and the crew suspected the cylinder liner was excessively worn and needed to be replaced.
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Time Wasted – Should Have Waited For Goltens
A recently built general cargo vessel experienced a bearing failure on its intermediate propeller shaft bearing. Goltens was contacted to perform an inspection on the bearing shell and pedestal and to propose a solution. Upon inspection it was determined that the entire housing would require repair, due to extensive damage on the bearings, sealing areas, and housing mating surfaces.
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Turnkey Optimarin Ballast Water Treatment Retrofit
A leading seismic survey vessel operator selected Optimarin’s 334m3/hour OBS ballast water treatment system for one of its research vessels. Goltens had previously completed two successful retrofits for this owner and was awarded this retrofit as well. The timeline was relatively short with only a 3-month window between project kick off and completion of the installation.
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