Turbine Plant for Steam Propulsion Vessels (UST Series)
[ Marine Boiler / Turbine ]

With the latest reheat-regenerative cycle systems and state-of-the art technologies to improve plant efficiency, our Ultra Steam Turbine Plant (UST) delivers the best economic and environmental performance to all customers. UST, our environmental-friendly propulsion system, contributes significantly to customers' good service with reliability and safety.
Main boiler
Main boiler
Ultra steam turbine (UST)
Ultra steam turbine (UST)

UST Series main Features

Much Higher Plant Efficiency
  • Higher plant efficiency achieving about 15% reduction in fuel oil consumption compared with CST series
Highly reliable and safe
  • Proven design based on established marine and land technologies
Environmentally friendly
  • Low CO2, NOx and SOx emissions
Flexible fuel selection
  • Oil, gas and dual firing
Extremely Long Life
  • Extremely long life due to robust design and appropriate safety margins

Track Record

Track Record for Main Boilers (UST and CST)

Track Record

Lineup and Specifications

Main Boiler

Series No. MBR-1E MBR-2E MBR-3E
Maximum evaporation kg/h 40,000 45,000 50,000
Firing System kg/h Roof firing for Min Burner, Horizontal firing for RH Burner
Furnace construction - Welded wall
Steam Pressure at S.H.O. MPa 10.0
Steam temperature at S.H.O. 560
Feed water temperature 138
Boiler design pressure MPa 12
Boiler efficiency % 88.5 based on the H.H.V. of fuel
Drum distance mm 4,850.0 5,400.0
Furnace depth mm 3,350.0 3,500.0 3,660.0
Furnace width mm 2,413.0 2,603.5
Number of burners - 2
Series No. MBR-4E MBR-5E MBR-6E MBR-7E
Maximum evaporation kg/h 55,000 60,000 65,000 70,000
Firing System kg/h Roof firing for Min Burner, Horizontal firing for RH Burner
Furnace construction - Welded wall
Steam Pressure at S.H.O. MPa 10
Steam temperature at S.H.O. 560
Feed water temperature 138
Boiler design pressure MPa 12
Boiler efficiency % 88.5 based on the H.H.V. of fuel
Drum distance mm 4,850.0 5,100.0
Furnace depth mm 4,260.0 4,420.0 4,560.0 4,720.0
Furnace width mm 2,413.0 2,603.5 2,921.0
Number of burners - 3

Track Record for Main Boilers (UST and CST)

UST and CST

Lineup and Specifications

Main Turbine (UST)

Output in MW 13~15 15~18 18~23
Main Frame MR21-II MR24-II MR32-II
HP Turbine Frame HR-20 HR-22
LP Turbine Frame LR-14 LR-16
Reduction Gear Frame Single tandem articulated type
Main Thrust Frame T-8 T-9 T-11
Output in MW 23~26 26~30 30~33 33~37
Main Frame MR36-II MR40-II MR45-II MR50-II
HP Turbine Frame HR-22 HR-26 HR-28
LP Turbine Frame LR-18 LR-20 LR-23
Reduction Gear Frame Single tandem articulated type or
dual tandem articulated type
Dual tandem articulated type
Main Thrust Frame T-13 T-15 T-17 T-19
  • HR-22:High-intermediate pressure turbine with 20- to 22-inch base-diameter
  • LR-18:Low pressure turbine with 18-inch last blade
  • T-13:Main thrust bearing with 13 × 103 cm2nominal surface areas

Stories of MHI Group Expertise