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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of steam turbines design and application 
SAQA US ID UNIT STANDARD TITLE
14065  Demonstrate knowledge of steam turbines design and application 
ORIGINATOR
SGB Power Plant Operations 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
A person credited with this unit standard will be able to distinguish between different steam turbine types and application theories, describe the operating philosophy of a steam turbine and explain concepts and theories related to steam turbines. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
Able to identify all major components of a steam turbine. 

UNIT STANDARD RANGE 
All types steam turbines used in the industrial process environment.
See range statements in the specific outcomes. 

Specific Outcomes and Assessment Criteria: 

SPECIFIC OUTCOME 1 
Distinguish between different steam turbines types and application theories 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Steam turbines types described. 
ASSESSMENT CRITERION RANGE 
Inclusive but not limited to High pressure (HP), Intermediate pressure (IP), Low pressure (LP), HP/LP bypass, condensing, back pressure, multi/single stage)
 

ASSESSMENT CRITERION 2 
2. Steam flow system illustrated. 
ASSESSMENT CRITERION RANGE 
types of blading, flow through the stages, steam extraction, steam exit points, gland sealing).
 

ASSESSMENT CRITERION 3 
3. Steam flow system components and application theory described. 
ASSESSMENT CRITERION RANGE 
Inclusive but not limited to gland seals, air ejectors, vacuum pumps, stop valve, control valve).
 

SPECIFIC OUTCOME 2 
Describe steam turbines concepts and theories. 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Blading theory explained. 
ASSESSMENT CRITERION RANGE 
Stationary blades versus rotating blades, impulse/reaction
 

ASSESSMENT CRITERION 2 
2. Energy conversion process understood. 
ASSESSMENT CRITERION RANGE 
Heat energy to kinetic energy.
 

ASSESSMENT CRITERION 3 
3. Relationship between pressure changes across the turbine. 
ASSESSMENT CRITERION RANGE 
Stage pressures versus condenser pressure
 

ASSESSMENT CRITERION 4 
4. Turbine speed devices are known and understood. 
ASSESSMENT CRITERION RANGE 
Governor control, mechanical hydraulic and electro hydraulic control systems, over-speed protection.
 

ASSESSMENT CRITERION 5 
5. Turbine shaft/casing expansion theories are known and understood. 
ASSESSMENT CRITERION RANGE 
Axial expansion and radial expansion, differential expansion, thrust mechanisms, turbine stress
 

ASSESSMENT CRITERION 6 
6. Turbine shaft vibration principles are known and understood. 
ASSESSMENT CRITERION RANGE 
Critical speeds, eccentricity, monitoring equipment, factors effecting vibration
 

ASSESSMENT CRITERION 7 
7. Condenser theory explained. 
ASSESSMENT CRITERION RANGE 
Heat exchange, condenser vacuum, partial pressure, relationship between pressure and temperature on steam condensate and cooling water, air evacuation and efficiency
 

ASSESSMENT CRITERION 8 
8. Gland sealing methods and applications explained. 
ASSESSMENT CRITERION RANGE 
Labyrinth seals, different types of sealing mediums
 

SPECIFIC OUTCOME 3 
Describe the operating philosophy of steam turbine systems 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Typical Turbine system configurations explained. 
ASSESSMENT CRITERION RANGE 
(Range: Steam, feed heating, oil, condensate, cooling water, air extraction, gland sealing)
 

ASSESSMENT CRITERION 2 
2. Operating philosophy of steam turbine systems explained. 
ASSESSMENT CRITERION RANGE 
Steam, feed heating, oil, condensate, cooling water, air extraction, gland sealing
 

ASSESSMENT CRITERION 3 
3. Factors influencing Turbine system efficiency are known and understood. 

ASSESSMENT CRITERION 4 
4. Typical Turbine system protections are known and understood. 
ASSESSMENT CRITERION RANGE 
(Range: Over-speed, condenser levels, bearings, vibrations, eccentricity, LP cylinder over pressure, thrust displacement, condenser pressure, steam condition, differential expansions, HP and LP heaters level protections)
 


UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
According to SAQA requirements

Moderation: Standard Generating Group Fossil Power Plant Operations - Technical Group 

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
Understanding of technical concepts and theories related to a steam turbine design and applications. 

UNIT STANDARD DEVELOPMENTAL OUTCOME 
N/A 

UNIT STANDARD LINKAGES 
N/A 


Critical Cross-field Outcomes (CCFO): 

UNIT STANDARD CCFO IDENTIFYING 
Identifying & solving problems in which responses display that responsible decisions using critical and creative thinking have been made. 

UNIT STANDARD CCFO WORKING 
Working effectively with others as a member of a team, group, organization, community. 

UNIT STANDARD CCFO ORGANISING 
Organising and managing oneself and one`s activities responsibly and effectively. 

UNIT STANDARD CCFO COLLECTING 
Collecting, analysing, organizing and critically evaluating information. 

UNIT STANDARD CCFO COMMUNICATING 
Communicating effectively using visual, mathematical and/or language skills in the modes of oral and/or written persuasion. 

UNIT STANDARD CCFO SCIENCE 
Using science and technology effectively and critically, showing responsibility towards the environment and health of others. 

UNIT STANDARD CCFO DEMONSTRATING 
Demonstrating an understanding of the world as a set of related systems by recognizing that problem-solving contexts do not exist in isolation. 

UNIT STANDARD CCFO CONTRIBUTING 
Contributing to the full personal development of each learner and the social and economic development of the society at large, by making it the underlying intention of any programme of learning to make an individual aware of the importance of:
a. Reflecting on and exploring a variety of strategies to learn more effectively;
b. Participating as responsible citizens in the life of local, national and global communities;
c. Being culturally and aesthetically sensitive across a range of social contexts;
d. Exploring education and career opportunities;
e. Developing entrepreneurial opportunities. 

UNIT STANDARD ASSESSOR CRITERIA 
N/A 

REREGISTRATION HISTORY 
As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
  ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
Core  23678   National Certificate: Fossil Power Plant Operation  Level 4  Level TBA: Pre-2009 was L4  Passed the End Date -
Status was "Reregistered" 		 2023-06-30  EWSETA 
Elective  48978   Further Education and Training Certificate: Electrical Network Control  Level 4  NQF Level 04  Passed the End Date -
Status was "Reregistered" 		 2023-06-30  EWSETA 
Elective  61569   Further Education and Training Certificate: Power Plant Operations  Level 4  NQF Level 04  Passed the End Date -
Status was "Reregistered" 		 2023-06-30  EWSETA 


PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
 
1. MPUMELELO TRAINING 


All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.