Unit of competency Outline

Date retreived
23/07/2026 5:15 AM AWST

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Demonstrate intermediate knowledge of marine steam turbines and main boilers

Demonstrate intermediate knowledge of marine steam turbines and main boilers

Unit of competency
National Code
MARL029
State Code
AUG71
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
27/02/2015
View on TGA
State Implementation and Classification
Approved Date
28/08/2015
Field of Education
031701 - Maritime Engineering
Original Release Date
28/08/2015
Nominal Hours
70
Description
This unit involves the skills and knowledge required to operate and maintain main steam propulsion plant and associated control systems on a commercial vessel.This unit applies to the work of a Marine Engineer Class 2 on commercial vessels greater than 3000 kW and forms part of the requirements for the Certificate of Competency Marine Engineer Class 2 issued by the Australian Maritime Safety Authority (AMSA).No licensing, legislative or certification requirements apply to this unit at the time of publication.
Notes
Elements and Performance Criteria
1 Evaluate energy balance of steam turbine plant
  • 1.1 Heat losses in a turbine and turbine system are analysed
  • 1.2 An enthalpy/entropy diagram is used to show how steam properties change through a turbine
  • 1.3 The affect air heaters and economisers have on turbine plant efficiency is explained
  • 1.4 Practical methods of verifying energy losses are detailed
2 Explain construction and operation of feed system
  • 2.1 Operation and components of the complete feed system are outlined
  • 2.2 Construction, operating principles and maintenance requirements of a regenerative condenser are explained
  • 2.3 Causes of loss of vacuum are identified
  • 2.4 Construction and operation of air ejectors, vacuums and extraction pumps are explained
  • 2.5 Construction and operation of gland condensers, low-pressure heaters, drain coolers and high-pressure heaters are explained
  • 2.6 General arrangement and construction of turbo-feed pumps is outlined
  • 2.7 Governor control is explained
  • 2.8 Operating principles and construction details of de-aerators are explained
3 Explain construction, operation and repair of high-pressure water tube boilers
  • 3.1 Operating principles of high-pressure boilers, including water and gas flow circulation are explained
  • 3.2 Drum, internal fittings and support and expansion arrangements are outlined
  • 3.3 Procedures for repairing a membrane wall furnace are clarified
  • 3.4 Operating principles and construction methods of integral and external superheaters are explained
  • 3.5 Construction and operation of economisers and air heaters is explained
  • 3.6 Chemistry of combustion is explained
  • 3.7 Typical burner register arrangements are outlined
  • 3.8 Construction, operation and maintenance of boiler gauge glasses and safety valves is explained
  • 3.9 Operation of boiler control and soot blowing system is detailed
  • 3.10 Blow-down procedure for a high pressure boiler is prepared
4 Explain requirements for feed water treatment for high-pressure water tube boilers
  • 4.1 How salts are precipitated and how metal is corroded in the boiler and feed system is explained and method of prevention is outlined
  • 4.2 How oxygen is eliminated in high-pressure boilers is shown
  • 4.3 How pH is measured and controlled is explained
  • 4.4 Normal and maximum operating limits for boiler feed water treatment are identified and procedure to follow if these limits are exceeded is clarified
  • 4.5 Purpose and procedure for different types of tests of boiler water chemistry are explained
5 Explain construction and operation of high-pressure turbines
  • 5.1 Flow of steam through nozzles is analysed, and pressure and velocity compounding are illustrated
  • 5.2 Construction of blades, bearings, glands, rotors and casings is explained
  • 5.3 Warming-through procedure prior to start up is explained
  • 5.4 Routine checks during operation are detailed
  • 5.5 Emergency operation of plant with one turbine inoperative is outlined
  • 5.6 Turbine shutdown procedure is clarified
  • 5.7 Routine checks carried out at a turbine plant survey are detailed
  • 5.8 Precautions necessary when turbine and gearing casings are open are explained and any repairs or adjustments that may be required are identified
  • 5.9 Performance of steam plant by routine observations of pressure temperature speed and vibration of turbine, gearing and associated systems is analysed
6 Explain turbine gearing arrangements
  • 6.1 Single and double reduction gearing systems are outlined
  • 6.2 Use of double helical involute gear teeth is explained
  • 6.3 Advantages and disadvantages of single and double locked tandem gearboxes are detailed
  • 6.4 Purpose of fitting a nodal drive in gearing system is clarified
  • 6.5 Construction and reason for installing flexible couplings in gearing system is explained
  • 6.6 Layout of a turbo-electric drive is detailed
7 Analyse flow of air and gas through a simple cycle marine gas turbine
  • 7.1 Construction of compressor, combustion system and single and two shaft turbines is explained
  • 7.2 Necessary controls required for control and protection of plant are confirmed
  • 7.3 Accessories necessary for safe operation of simple cycle marine gas turbines are listed
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No information
State Code National Code Title Type
AVQ3 MAR60115 Advanced Diploma of Maritime Operations (Marine Engineering Class 2) Qualification