Marine Boiler and Steam Turbine Generator for FPSO/FSO/FSRU/FLNG
MHI's original marine boiler and steam turbine generator for FPSO, FSO, FSRU, and FLNG systems can be supplied as an assembled unit that includes an ideal combination of equipment for achieving the best heat efficiency.
- Compact design
- Easy installation
- - Supplied as an assembled unit
- Easy operation
- - Full remote automation
- Cost effective
- - Improved plant efficiency
- Reliable and safe
- - Proven design based on marine and land technology
Lineup and Specifications
16-Bar Class Boiler with Saturated Steam Temperature
|Steam pressure||bar||16 (up to 25)|
|Steam temperature||°C||Saturated temperature|
60-Bar Class Large-Size Marine Boiler
|Steam temperature||°C||515 (Superheated steam)|
60-Bar Class Boiler with 515°C Superheat Steam Temperature
|Steam temperature||°C||515 (Superheated steam)|
In addition to periodic maintenance services, MHI offers a range of value-added services to enhance the satisfaction of our customers.
Featured service menu:
Regular inspections and preventive maintenance
Since LNG vessels today have a very long service life, the boilers on these vessels are required to operate for around 20 to 40 years under difficult conditions. It is essential that you carry out preventive maintenance of the boiler to protect against aging deterioration.
MHI has expert knowledge in preventive maintenance and will help you ensure that your vessel has a long, trouble-free service life by replacing and servicing essential boiler components.
Improve combustion: Low load gas mode
MHI will retrofit existing main boilers with the low-load gas mode currently equipped as standard on new vessels. This mode allows boilers to operate using gas-only firing when the ship is operating under low loads.
Scheduled maintenance for long-term operation
MHI will carry out general maintenance of boiler mechanical parts and testing of tubes (superheater tubes, bank tubes, and economizer tubes).
Scheduled maintenance for long-term operation (control and electrical systems)
MHI will carry out general maintenance of the control system while your ship is docked as a preventive measure to avoid major accidents.
Upgrade of control system to the latest version
MHI recommends that you upgrade your control system to the latest version to enhance system response in emergency situations and to ensure that the automatic operation features of the control system function correctly in older boilers.
Training at MHI
MHI will hold a training workshop at MHI Nagasaki to teach engineers how to troubleshoot boiler-related problems.
Operational data logging for troubleshooting
MHI will install a data logging function on the boiler control panel.
Change to easy-to-remove casing on superheater
MHI recommends you to switch your superheater casing to a type that can be divided into several pieces for easy removal.
To cope with high fuel costs, it is vital to maintain a high turbine efficiency. MHI provides various solutions to keep your turbines in optimal condition and reduce your operating costs.
Regular inspections and preventive maintenance
Since LNG vessels today have a very long service life, the turbines on these vessels are required to operate for around 20 to 40 years under difficult conditions. It is essential that you carry out preventive maintenance of the turbine to protect against aging deterioration.
MHI has expert knowledge in preventive maintenance and will help you ensure that your vessel has a long, trouble-free service life by replacing and servicing essential turbine components.
Measures to prevent stud bolts from seizing
The stud bolts and nuts used in high temperature areas are made of a high-strength material to stop them overheating. However, this material sometimes causes the bolts to seize.
MHI recommends replacing existing bolts and nuts with newly improved ones made of a special material with an aluminum coating to prevent seizing.
Updating the shaft vibration and position monitor
The VM-3 model has been discontinued and maintenance is no longer available. However current monitors can be replaced by the new VM-5 model without any modifications to your system.
Upgrade of turbine remote control system
MHI strongly recommends renewing the entire remote control system in vessels that have been in service around 15 years or more. The turbine remote control system is an electronic device that includes a computer and a power supply system. According to Japan Electrical Manufacturers' Association (JEMA) standards, the endurance of the system is 10 years.
Modification of inspection window
MHI has modified the inspection window to enable easy access during inspections while preventing foreign substances entering while the window is open. The inspection window is closed by bolts during turbine operation. During inspections, all bolts are loosened to open the cover.
Gear tooth surface repair
Micro-pitting has been discovered on the tooth surface of some LP1P1W articulated type reduction gears that have been in operation for 20 years.
MHI recommends repairing the aging deterioration by using state-of-the-art helical gear teeth, which are expected to enable a further 20 years of safe operation.
Replacement of NASH vacuum pumps for condensers
NASH vacuum pumps, which were used for turbines until 1998, are no longer used in marine applications. In order to preventing accidents that might occur due to the unavailability of replacement parts, MHI recommends replacing NASH pumps with our latest pump.
Main turbine dock maintenance
MHI can provide a recommended dock maintenance parts list for the main turbine that covers the docking schedule of each ship for the next 20 years. The list helps you to figure out what maintenance is required when your ship is docked.
Change of packing ring to all-in-one type (information only)
MHI plans to supply a solid-type fin for all new orders.
The HP/LP gland packing ring and diaphragm packing are fabricated by embedding fins in the groove of the ring. Since the fins and the ring are made of different materials, their thermal expansion characteristics differ, causing the fins to contract and fall off the groove in some cases.
Preparation of spare parts to enable immediate repair of cracks on main valves
In very rare cases, cracks have been found in the valve stellite during scheduled maintenance while ships are docked. These cracks have occurred as a result of low cycle fatigue caused by repeatedly operating and stopping the engine.
MHI has prepared valve bodies, seats, spindles, bushes and other essential parts to enable us to promptly repair valves found to be cracked during dock maintenance work.
Preparation of backup astern guardian valves
MHI stocks full astern valve assemblies as a backup measure.
Recently, cracks have been found in the stellited area of the valve body and valve disc during scheduled maintenance. This is thought to have occurred as a result of low cycle fatigue caused by repeatedly operating and stopping the engine (thermal history).
Inspection of inside of main condenser water chamber
MHI can dispatch expert technicians to carry out a full inspection of the tube sheet surface, inside the tube, and the rubber lining.
Normally maintenance work such as cleaning the inside of the water chamber is carried out as part of dock maintenance, but there is concern that a full inspection of inner parts such as inside the cooling tube, the sheet surface, and the inner fitted rubber lining might not be being carried out with a high level of precision.
Stocking of turning device parts
MHI recommends keeping spare parts on hand to perform immediate repairs if required for turning device parts.
Turning devices are installed on turbine ships to prevent thermal damage to the turbine rotors while warming up and cooling down. Recently, incidents of non compliance due to operator error have occurred.
Use of hydraulic torque wrench
Usually, large diameter bolts on the main turbine are tightened by hand using a slug wrench.
MHI recommends using a hydraulic torque wrench when tightening and loosing bolts on the main turbine. MHI stocks hydraulic torque wrenches at the docks in Dubai and Singapore that can be borrowed by customers as required.
Upgrading to a higher performance bolt heater
Hydraulically tightening unheated bolts on a cold turbine will cause too large a strain on the threads and is not a feasible method from a structural point of view. For safety purposes, MHI recommends upgrading to an HF induction bolt heater. The tightening force on HP turbine casing bolts (high-pressure, high temperature regions) is specified as 30 kg/mm2 during operation.
Tooth surface correction (preparation of spare parts at the depot)
LP1P and LP1W are available as common replacement parts for the main turbine gears used in NWS PJ (8 vessels).
By using these parts, you no longer have to carry out gear shaving; instead you can adjust the inclination on the bearing side. This enables a significant reduction in maintenance work hours because you no longer need to bring your units to our factory.
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Harris Pye Japan Co., Ltd.
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News & Reviews
- January 15, 2013
- MHI to Establish Marketing and Design Company in China For Small/Medium-size Steam Turbines and Marine-use Steam Turbines, Jointly with Qingdao Jieneng Steam Turbine Group
Business contact: Energy & Environment Power Systems Marine Machinery & Engine Division