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 THAT HAS PASSED THE END DATE: 

Demonstrate understanding of equipment used in gas installations 
SAQA US ID UNIT STANDARD TITLE
246453  Demonstrate understanding of equipment used in gas installations 
ORIGINATOR
Chemical Industries SGB 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Engineering and Related Design 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  8 
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 
Learners who demonstrate competence as described in the outcomes of this unit standard will be able to explain the operation of pumps, compressors, heat exchangers and scales in a gas installation.

The qualifying learner is able to:
  • Demonstrate an understanding of the application of pumps in gas installations.
  • Demonstrate an understanding of the operating principles of pumps.
  • Demonstrate an understanding of the application of compressors in gas installations.
  • Demonstrate an understanding of the operating principles of basic compressors.
  • Demonstrate an understanding of heat exchangers in gas installations.
  • Demonstrate an understanding of scales in gas installations. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    Learners accessing this unit standard will have demonstrated competence against communication and mathematical literacy at NQF Level 2 or equivalent. 

    UNIT STANDARD RANGE 
    The typical context of this unit standard assumes an existing or new domestic or commercial gas installation site.

    The typical scope of this unit standard includes one of the following but is not limited to:
  • LPG installations.
  • Natural gas installations.
  • Compressed gas installations.
  • Medical installations.

    Range statements, which are applicable to the Unit Standard title, Specific Outcomes and Assessment Criteria are found beneath the applicable assessment criteria. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Demonstrate an understanding of the application of pumps in gas installations. 
    OUTCOME RANGE 
    Pump types include centrifugal- and reciprocating pumps. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Different types of pumps and their applications are described as applied in the gas installation industry. 

    ASSESSMENT CRITERION 2 
    The advantages and disadvantages of the different pump types are explained based on typical industry experience. 

    ASSESSMENT CRITERION 3 
    Symbols used to indicate pumps are used in freehand drawings in accordance with draughting conventions. 

    ASSESSMENT CRITERION 4 
    Indicators and reasons for poor pump performance are described in accordance with the given range. 
    ASSESSMENT CRITERION RANGE 
    The reasons include electric faults, bearing failure, fluid temperature, low feed tank level, fluid composition, cavitation, mechanical problems, corrosion, leaking seals.
     

    ASSESSMENT CRITERION 5 
    Drive and power transfer equipment used for pumps and compressors are explained in accordance with the given range. 
    ASSESSMENT CRITERION RANGE 
    Power transfer equipment includes electric motors, gearboxes, direct drives, chain drives and belt drives.
     

    ASSESSMENT CRITERION 6 
    Safety features and equipment employed with pumps are described in accordance with safety requirements. 

    SPECIFIC OUTCOME 2 
    Demonstrate an understanding of the operating principles of pumps. 
    OUTCOME RANGE 
    Pump types include centrifugal- and reciprocating pumps. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Components of pumps are identified as indicated by the given range. 
    ASSESSMENT CRITERION RANGE 
    Components include suction line, discharge line, casing, impeller, blades, pump shaft, piston.
     

    ASSESSMENT CRITERION 2 
    Basic working principles of pumps are described in accordance with operational procedures. 

    ASSESSMENT CRITERION 3 
    Simple pump system configurations are identified and explained using a freehand sketch and in accordance with operational procedures. 
    ASSESSMENT CRITERION RANGE 
    Configurations include feed tank, suction line, discharge line, return line, standby pump, and motor with switchgear and block valves.
     

    ASSESSMENT CRITERION 4 
    Freehand drawings of simple pump configurations are made and described as per draughting conventions. 

    SPECIFIC OUTCOME 3 
    Demonstrate an understanding of the application of compressors in gas installations. 
    OUTCOME RANGE 
    Compressor types include basic centrifugal- and reciprocating compressors. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Different types of compressors are described as applied in the gas installation industry. 

    ASSESSMENT CRITERION 2 
    The application of compressors in gas installations is described as relevant to the gas industry. 

    ASSESSMENT CRITERION 3 
    The advantages and disadvantages of centrifugal and reciprocating compressors are explained based on typical industry experience. 

    ASSESSMENT CRITERION 4 
    Symbols used for compressors are identified in flow diagrams in accordance with draughting conventions. 

    ASSESSMENT CRITERION 5 
    Indicators and reasons for poor equipment performance are identified and described in accordance with the given range. 
    ASSESSMENT CRITERION RANGE 
    Reasons include electric faults, bearing failure, gas temperature, gas composition, cavitations, mechanical problems, corrosion, leaking seals.
     

    SPECIFIC OUTCOME 4 
    Demonstrate an understanding of the operating principles of basic compressors. 
    OUTCOME RANGE 
    Compressor types include basic centrifugal- and reciprocating compressors. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Main components of compressors are identified as relevant to the gas installation industry. 

    ASSESSMENT CRITERION 2 
    Basic working principles of compressors are described in accordance with operational procedures. 

    ASSESSMENT CRITERION 3 
    A freehand drawing of a simple configuration for a compressor system is made and explained in accordance with operational procedures. 
    ASSESSMENT CRITERION RANGE 
    Configuration includes compressor, gas inlet, knockout drum, suction line, discharge line, bypass line, block valves and motor.
     

    ASSESSMENT CRITERION 4 
    High-pressure safety devices are identified and their purpose described in accordance with safety requirements. 
    ASSESSMENT CRITERION RANGE 
    Safety devices include spillback lines, relief valves (RVs), safety valves (SVs), bursting discs, trips and alarms.
     

    SPECIFIC OUTCOME 5 
    Demonstrate an understanding of heat exchangers in gas installations. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Different types of heat exchangers and their applications are described as applied in the gas installation industry. 
    ASSESSMENT CRITERION RANGE 
    The range of heat exchangers includes shell and tube, double tube, plate, air coolers, vapourisers and fin tube types.
     

    ASSESSMENT CRITERION 2 
    The advantages and disadvantages of different heat exchanger types are explained based on typical industry experience. 

    ASSESSMENT CRITERION 3 
    Symbols used to indicate heat exchangers are used in simple freehand drawings in accordance with draughting conventions. 

    ASSESSMENT CRITERION 4 
    Indicators and reasons for poor heat exchanger performance are described in accordance with the given range. 
    ASSESSMENT CRITERION RANGE 
    The reasons include fouling, leaks, obstruction, channelling, poor flow, vibration, corrosion and cooling/heating medium temperature.
     

    ASSESSMENT CRITERION 5 
    Components of heat exchangers are identified as by the given range. 
    ASSESSMENT CRITERION RANGE 
    Components include tubes, shell, heads, inlets, outlets, baffle plates, tube sheets, fins and insulation.
     

    ASSESSMENT CRITERION 6 
    Basic working principles of heat exchangers are described in accordance with operational procedures. 

    ASSESSMENT CRITERION 7 
    Simple heat exchanger system configurations are sketched and explained in accordance with operational procedures. 
    ASSESSMENT CRITERION RANGE 
    Configurations include single pass, double pass, counter flow, air coolers/vapourisers, u-tube and kettle design.
     

    SPECIFIC OUTCOME 6 
    Demonstrate an understanding of scales in gas installations. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Different types of scales and their applications are described as specified in the gas installation industry. 

    ASSESSMENT CRITERION 2 
    The advantages and disadvantages of different scale types are explained based on typical industry experience. 

    ASSESSMENT CRITERION 3 
    Methods of calibration and zeroing of scales are described as per procedures. 

    ASSESSMENT CRITERION 4 
    Components of scales are identified through a given sketch/diagram. 

    ASSESSMENT CRITERION 5 
    Basic working principles of scales are described as per operational procedures. 

    ASSESSMENT CRITERION 6 
    Simple scale configurations are sketched and explained as per operational procedures and draughting conventions. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • An assessor, accredited with a relevant NQF Level 3 or higher qualification, will assess the learner's competency.
  • Only an Assessor with considerable first hand experience in gas installations will assess the learner's competency.
  • Anyone assessing a learner or moderating the assessment of a learner against this Unit Standard must be registered as an Assessor with the relevant ETQA.
  • Direct observation in simulated or actual work conditions is required. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    The qualifying learner understands and is able to:
  • Demonstrate an understanding of the application of pumps in gas installations.
  • Demonstrate an understanding of the operating principles of pumps.
  • Demonstrate an understanding of the application of compressors in gas installations.
  • Demonstrate an understanding of the operating principles of basic compressors.
  • Demonstrate an understanding of heat exchangers in gas installations.
  • Demonstrate an understanding of scales in gas installations. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    The learner is able to identify and solve problems in which responses display that responsible decisions, using critical and creative thinking, have been made by:
  • Identifying the indicators and reasons for poor pump, equipment and heat exchanger performance.

    Refer to the following Specific Outcome(s):
  • Demonstrate an understanding of the application of pumps in gas installations.
  • Demonstrate an understanding of the application of compressors in gas installations.
  • Demonstrate an understanding of heat exchangers in gas installations. 
    		•

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team, group, organisation or community by:
  • Maintaining sound relations with co-workers/learners.

    Refer to the Specific Outcome(s):
  • Demonstrate an understanding of the operating principles of pumps.
  • Demonstrate an understanding of the operating principles of basic compressors.
  • Demonstrate an understanding of scales in gas installations. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    The learner is able to organise and manage himself and his activities responsibly and effectively by:
  • Analysing generic gas equipment configurations

    Refer to the following Specific Outcome(s):
  • Demonstrate an understanding of the operating principles of pumps.
  • Demonstrate an understanding of the operating principles of basic compressors.
  • Demonstrate an understanding of heat exchangers in gas installations.
  • Demonstrate an understanding of scales in gas installations. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information by:
  • Sudying the basic working principles and safety features of pumps, compressors and other gas installation equipment and applying this knowledge to daily activities.

    Refer to all Specific Outcomes. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively by using mathematical and/or language skills in the modes of oral and/or written presentations by:
  • Making freehand drawings of a range of symbols to indicate pumps and other related gas installation equipment.
  • Making freehand drawings of simple pump-, compressor system-, heat exchanger system- and scale configurations.

    Refer to the following Specific Outcome(s):
  • Demonstrate an understanding of the operating principles of pumps.
  • Demonstrate an understanding of the operating principles of basic compressors.
  • Demonstrate an understanding of heat exchangers in gas installations.
  • Demonstrate an understanding of scales in gas installations. 
    		•

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

    Refer to all Specific Outcomes. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by:
  • Recognising that gas installation equipment does not exist in isolation.

    Refer to all Specific Outcomes. 
    		•

    UNIT STANDARD CCFO CONTRIBUTING 
    Contribute to the full personal development of each learner and the social and economic development of the society at large by:
  • Understanding the role of gas installation equipment in the gas industry and the effect it has on the growth and development of the organisation, its customers and employees.

    Refer to all Specific Outcomes. 
    		•

    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  58950   National Certificate: Gas Installations  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  CHIETA 


    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.
     
    NONE 


    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.