SAQA 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.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Demonstrate knowledge of Steam Generator design and application 
SAQA US ID UNIT STANDARD TITLE
10574  Demonstrate knowledge of Steam Generator 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 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
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 is able to distinguish between different steam generator types and application theories/concepts, describe steam generation concepts and theories, describe the operating philosophy of a steam generator, demonstrate knowledge of combustion processes on a steam generator, explain protections required on a steam generator, demonstrate understanding of steam generator efficiency and identify potential safety hazards on a steam generator. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Able to identify main components of a steam generator.
  • Unit Standard: Apply engineering principles and concepts in the Power Generation Process Plant. 

  • UNIT STANDARD RANGE 
    All types of steam generators used in the industrial process environment. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Distinguish between different steam generator types and application theories. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Steam generator types described. 
    ASSESSMENT CRITERION RANGE 
    Inclusive but not limited to Benson, Drum, Super critical, Re-heaters, Natural/forced circulation.
     

    ASSESSMENT CRITERION 2 
    2. Steam and water system process flow illustrated. 
    ASSESSMENT CRITERION RANGE 
    Once through and drum type.
     

    ASSESSMENT CRITERION 3 
    3. Steam and water system components application theory described. 
    ASSESSMENT CRITERION RANGE 
    Inclusive but not limited to circulating pumps, tube arrangements, attemporators bottom headers, economisers, drums, steam separation vessels.
     

    SPECIFIC OUTCOME 2 
    Describe steam generation concepts and theories. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Phase transition theory of steam generation known and understood. 
    ASSESSMENT CRITERION RANGE 
    Sensible heat, latent heat and super heat.
     

    ASSESSMENT CRITERION 2 
    2. Steam table applications interpreted. 
    ASSESSMENT CRITERION RANGE 
    No calculations required.
     

    ASSESSMENT CRITERION 3 
    3. Steam table readings comprehended. 
    ASSESSMENT CRITERION RANGE 
    Relationship between steam table measurements with respect to temperature, volume, pressure and enthalpy.
     

    ASSESSMENT CRITERION 4 
    4. Heat transfer concepts pertaining to steam generation are known and understood. 
    ASSESSMENT CRITERION RANGE 
    Convection, radiation and conduction.
     

    ASSESSMENT CRITERION 5 
    5. Water flow distribution through steam generation tubes is known. 
    ASSESSMENT CRITERION RANGE 
    Orifice, varying tube sizes.
     

    SPECIFIC OUTCOME 3 
    Describe the operating philosophy of a steam generator. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Fuel firing systems operating philosophy described. 
    ASSESSMENT CRITERION RANGE 
    Coal, fuel oil, waste products, gas
     

    ASSESSMENT CRITERION 2 
    2. Combustion air and flue gas systems operating philosophy described. 
    ASSESSMENT CRITERION RANGE 
    Primary air, secondary air, tertiary air, flue gas, air heaters, flue gas conditioning systems, gas probes, fans, expansion joints.
     

    ASSESSMENT CRITERION 3 
    3. Steam and feed water systems operating philosophy described. 
    ASSESSMENT CRITERION RANGE 
    Spray water systems, steam flow, feed water flow, soot blowing, valves.
     

    ASSESSMENT CRITERION 4 
    4. Ash collection systems operating philosophy described. 
    ASSESSMENT CRITERION RANGE 
    Bag filters, electrostatic precipitators, bottom ash system, grit removal, fly ash system.
     

    SPECIFIC OUTCOME 4 
    Demonstrate knowledge of combustion processes on a steam generator. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Characteristics of products for combustion are known and understood. 
    ASSESSMENT CRITERION RANGE 
    Included but not limited to composition of products for combustion, calorific value, waste products.
     

    ASSESSMENT CRITERION 2 
    2. Combustion elements described. 
    ASSESSMENT CRITERION RANGE 
    Time, turbulence, temperature,heat, fuel, air.
     

    ASSESSMENT CRITERION 3 
    3. Philosophy of flame formation described. 
    ASSESSMENT CRITERION RANGE 
    Flame impingement, ignition points, flame density, pulsation, colour, brightness, flame envelope, flame stability.
     

    ASSESSMENT CRITERION 4 
    4. Concept of complete and incomplete combustion known. 
    ASSESSMENT CRITERION RANGE 
    Stoichiometric combustion, excess air.
     

    SPECIFIC OUTCOME 5 
    Explain protections required on a steam generator. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Physical structural protections known and understood. 
    ASSESSMENT CRITERION RANGE 
    Expansion, contraction, explosion, implosion, furnace seal, boiler structure support.
     

    ASSESSMENT CRITERION 2 
    2. Steam temperature and steam flow protections required explained. 

    ASSESSMENT CRITERION 3 
    3. Flame safety system protection known and understood. 
    ASSESSMENT CRITERION RANGE 
    Inclusive of all flame monitoring, fuel cut off, furnace pressures, air supply, wind box damper control and purging.
     

    ASSESSMENT CRITERION 4 
    4. Drum level protections required explained. 

    ASSESSMENT CRITERION 5 
    5. Safety valve requirements and applications explained. 
    ASSESSMENT CRITERION RANGE 
    Includes the following statutory requirements: calibration certificate, gagging conditions, setting seals.
     

    ASSESSMENT CRITERION 6 
    6. Tube leak protections required explained. 

    SPECIFIC OUTCOME 6 
    Demonstrate understanding of steam generator efficiency. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Efficiency defined. 

    ASSESSMENT CRITERION 2 
    2. Factors influencing steam generator efficiency identified. 

    ASSESSMENT CRITERION 3 
    3. Personal contribution of efficiency demonstrated. 
    ASSESSMENT CRITERION RANGE 
    Reporting, communication, rectification.
     

    SPECIFIC OUTCOME 7 
    Identify potential safety hazards on a steam generator. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Furnace and gas path inspection procedure known and understood. 

    ASSESSMENT CRITERION 2 
    2. Safety hazards pertaining leaks identified. 
    ASSESSMENT CRITERION RANGE 
    Steam, Primary fuel, water, gas, fuel oil.
     

    ASSESSMENT CRITERION 3 
    3. Waste removal hazards and precautionary actions known and understood. 
    ASSESSMENT CRITERION RANGE 
    Includes personal protective equipment, ashing, reject removal.
     


    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 steam generators. 

    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. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  48973   National Certificate: Clothing, Textiles, Footwear and Leather (CTFL) Mechanician Processes  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered" 
    2015-06-30  FPMSETA 
    Core  23678   National Certificate: Fossil Power Plant Operation  Level 4  Level TBA: Pre-2009 was L4  Reregistered  2023-06-30  EWSETA 
    Elective  48978   Further Education and Training Certificate: Electrical Network Control  Level 4  NQF Level 04  Reregistered  2023-06-30  EWSETA 
    Elective  61569   Further Education and Training Certificate: Power Plant Operations  Level 4  NQF Level 04  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.
     
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    6. Imbokodo General Trading cc 
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    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.