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: 

Identify and interpret instrument control loops in gas installations 
SAQA US ID UNIT STANDARD TITLE
246457  Identify and interpret instrument control loops 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  5 
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 identify and interpret basic instrument control loops used in a gas installation.

The qualifying learner is able to:
  • Locate and identify process and instrumentation diagrams.
  • Identify piping and valves from P&IDs.
  • Identify equipment from P&IDs.
  • Explain the use of control loops 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 
    Describe the legislation that reflects the employer/employee relationship. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The unique features of process and instrumentation diagrams (P&IDs) are listed as per draughting conventions. 

    ASSESSMENT CRITERION 2 
    Different line structures used in P&IDs are explained as per draughting conventions. 

    ASSESSMENT CRITERION 3 
    Information contained in the legend and information block are explained as per draughting conventions. 

    ASSESSMENT CRITERION 4 
    Different symbol types used in P&IDs are explained as per draughting conventions. 
    ASSESSMENT CRITERION RANGE 
    Symbol types include, but are not limited to labels, arrows, symbols and legends.
     

    ASSESSMENT CRITERION 5 
    Different abbreviations used in P&IDs are explained as per draughting conventions. 

    SPECIFIC OUTCOME 2 
    Identify piping and valves from P&IDs. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Pipe and tube specifications are identified from the P&ID as per draughting conventions. 

    ASSESSMENT CRITERION 2 
    Different line break conventions are interpreted as per draughting conventions. 
    ASSESSMENT CRITERION RANGE 
    Line break conventions include but are not limited to line codes, off-page connectors, tie-in symbols, tagging conventions and bubble connectors.
     

    ASSESSMENT CRITERION 3 
    Peripheral piping equipment is identified from P&IDs as per draughting conventions. 
    ASSESSMENT CRITERION RANGE 
    Peripheral equipment includes, but is not limited to flanges, reducers, vents, drains, steam traps, filters, strainers, interlocks, expansion loops and expansion bellows.
     

    ASSESSMENT CRITERION 4 
    Different valve types are identified from P&IDs as per draughting conventions. 
    ASSESSMENT CRITERION RANGE 
    Valve types include but are not limited to ball-, gate-, globe-, butterfly-, check-, 3-way-, 4-way- and relief valves.
     

    ASSESSMENT CRITERION 5 
    The piping network for a process, as shown on a P&ID, is identified on-site as per relevant P&ID. 

    SPECIFIC OUTCOME 3 
    Identify equipment from P&IDs. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    A list of equipment and instrument symbols used in P&IDs is compiled as per draughting conventions. 

    ASSESSMENT CRITERION 2 
    Equipment and instrument symbols and labels appearing on the P&ID are identified and explained as per draughting conventions. 

    ASSESSMENT CRITERION 3 
    The flow of gas through a system is described with the assistance of a P&ID. 

    ASSESSMENT CRITERION 4 
    A freehand P&ID drawing showing all equipment and instruments is made for an existing gas installation as per draughting conventions. 

    ASSESSMENT CRITERION 5 
    Process equipment, as shown on a P&ID, is identified on-site as per relevant P&ID. 

    SPECIFIC OUTCOME 4 
    Explain the use of control loops in gas installations. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Basic control loop systems are identified using a P&ID. 

    ASSESSMENT CRITERION 2 
    The principles and logic of control loops are explained using simple examples. 
    ASSESSMENT CRITERION RANGE 
    The basic logic includes but is not limited to measuring the variable, comparing it to a setting and adjusting some parameter in an attempt to move the variable closer to the setting.
     

    ASSESSMENT CRITERION 3 
    The different control modes used in control loops are explained with examples of practical applications to confirm understanding. 
    ASSESSMENT CRITERION RANGE 
    The modes include automatic, manual and ratio control.
     

    ASSESSMENT CRITERION 4 
    The different control loop types are explained with examples of practical applications to confirm understanding. 
    ASSESSMENT CRITERION RANGE 
    Control loop types include feed forward, feed back and split range.
     

    ASSESSMENT CRITERION 5 
    The application of safety devices in control loops is explained with examples of practical applications to confirm understanding. 
    ASSESSMENT CRITERION RANGE 
    Safety devices include alarms, trips, interlocks, fail safes and flash backs.
     

    ASSESSMENT CRITERION 6 
    The elements of every control loop in an actual installation is identified and described as per relevant P&ID. 
    ASSESSMENT CRITERION RANGE 
    The elements include measurement elements, signal transfer elements, actuators responding to signals, alarms, trips, interlocks and fail safes.
     

    ASSESSMENT CRITERION 7 
    The logic and functioning of every control loop are clearly described in terms of the purpose of the control loop. 
    ASSESSMENT CRITERION RANGE 
    Logic should include measurement, comparison to a target and the adjustment of some parameter.
     


    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:
  • Locate and identify process and instrumentation diagrams.
  • Identify piping and valves from P&IDs.
  • Identify equipment from P&IDs.
  • Explain the use of control loops 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:
  • Describing the logic and functioning of every control loop in terms of the purpose of the control loop.
  • Setting and adjusting parameters in an attempt to move the variable closer to the setting.

    Refer to the following Specific Outcome/s:
  • Explain the use of control loops in gas installations. 
    		•

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team, group, organisation or community. 

    UNIT STANDARD CCFO ORGANISING 
    The learner is able to organise and manage himself and his activities responsibly and effectively by:
  • Drawing a freehand P&ID showing all equipment and instruments for an existing gas installation.
  • Identifying the piping network and equipment for a process, as shown on a P&ID, on-site.

    Refer to the following Specific Outcomes:
  • Identify piping and valves from P&IDs.
  • Identify equipment from P&IDs. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information by:
  • Correctly reading and interpreting P&IDs to be able to safely install gas equipment.

    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:
  • Interpreting different symbols, lines, equipment, etc, as per P&IDs.
  • Drawing a freehand P&ID showing all equipment and instruments for an existing gas installation.

    Refer to all Specific Outcomes. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically, showing responsibility towards the environment and health of others by:
  • Correctly reading and interpreting P&IDs and applying this to the successful and safe installation of gas equipment.

    Refer to all Specific Outcomes. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by:
  • Correctly interpreting P&IDs and relating this to a new gas installation that needs to be done.
  • Understanding the control loop system.

    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 P&IDs in a successful gas installation and the effect it has on the safety 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.