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: 

Join metals using the resistance welding process 
SAQA US ID UNIT STANDARD TITLE
12482  Join metals using the resistance welding process 
ORIGINATOR
SGB Manufacturing and Assembly Processes 
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 2  NQF Level 02 
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 
Joining metals using the resistance welding process. This includes preparing and maintaining the equipment and controlling the quality of the completed welds.

The skills, values and knowledge reflected in this unit standard are required by people in the field of engineering fabrication, which includes boilermaking, sheetmetal working, welding and vehicle body building. The learning outcomes in this unit standard contribute to the exit level outcomes required for the National Certificate in Fabrication (NQF level 2) and related qualifications. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
This unit standard has been designed as part of a progression. It is one of a series of unit standards for welding metals in the fabrication field.

The credits allocated to this unit standard assume that a learner has already learned to understand and apply safe work practices and to select, use and care for engineering hand and power tools. 

UNIT STANDARD RANGE 
A general guide to the scope, context conditions, and level at which I am expected to perform.
The scope and level of this unit standard is determined by the ranges as indicated under the specific outcomes. All work is performed under supervision. 

Specific Outcomes and Assessment Criteria: 

SPECIFIC OUTCOME 1 
Prepare for work activity. 
OUTCOME NOTES 
  • Interpret job instructions and determine sequence of operations
  • Find relevant worksite procedure and determine operational requirements
  • Select and prepare equipment for operation including routine maintenance and pre-operational checks
  • Implement maintenance procedures for copper electrodes
  • Adjust settings and assemble equipment
  • Check that consumables required are at the workstation
  • Prepare materials for welding
  • Identify hazards and take preventative action 
  • OUTCOME RANGE 
  • Worksite procedure: international, national and company quality procedures which govern the welding operation
  • Resistance welding process variations include spot welding (RSW), projection welding (RPW) and seam welding (RSEW)
  • Hazards include electrical, hot metal, fumes, fire and/or explosion, mechanical
  • Equipment includes power source rating and duty cycle, electrodes, cooling system, electrode force
  • Metals include carbon steel, galvanised steel
  • Material characteristics include electrical and thermal conductivity; surface conditions include coatings, corrosion 

  • ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 

    SPECIFIC OUTCOME 2 
    Join metals using the resistance welding process. 
    OUTCOME NOTES 
  • Set up workpiece
  • Establish welding parameters
  • Weld materials
  • Dispose of waste materials
  • Store reusable material 
  • OUTCOME RANGE 
    Welding parameters include welding current, electrode force, welding time, electrode material and design 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 

    SPECIFIC OUTCOME 3 
    Apply quality checks on welded metals. 
    OUTCOME NOTES 
  • Identify and correct welding defects
  • Clean welds after welding
  • Check completed weld using visual examination 
  • OUTCOME RANGE 
    Tests to identify defects include peel and chisel tests
    Cleaning tools include wire brushes, chipping hammer, pneumatic chipping hammer 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 

    SPECIFIC OUTCOME 4 
    Recognise and report problems of quality, operation, output, safety. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 

    SPECIFIC OUTCOME 5 
    Report outcomes of work done. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 

    SPECIFIC OUTCOME 6 
    Apply safe working practices and discuss issues related to safety of self, fellow workers. 
    OUTCOME NOTES 
    Apply safe working practices and discuss issues related to safety of self, fellow workers, machines, equipment, materials and the environment. 
    OUTCOME RANGE 
    Safe working practices include use of appropriate personal protective equipment, isolation from electrical shocks, taking extra precautions in damp areas, ensuring adequate ventilation 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    1. Welded metals meet job and quality specifications. 
    ASSESSMENT CRITERION NOTES 
    Indicators :

    1. Finished weld operation meets all quality procedure requirements
    2. Correct welding equipment is selected
    3. Correct consumables are chosen for parent metals
    4. Equipment is set up to work safely and without damage to work piece or equipment
    5. Safe working practices are adhered to
    6. Materials are prepared before welding
    7. Materials are welded according to specifications
    8. Welding defects are identified and corrected
    9. Welds are cleaned after welding
    10. A clean and tidy work environment is maintained
    11. Hazards are identified and avoided

    Understanding confirmed :

    Explain and discuss
    1. Process of resistance welding
    2. Equipment, functions, parts, consumables and set up
    3. Requirements in worksite procedure
    4. Applicable theory
    5. Metals - Characteristics and surface condition
    6. Welding defects and hazards
    7. Safety procedures and equipment
    8. Reporting procedures
    9. Methods of cleaning welds 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    My assessment will be governed by the policies and guidelines of the MERSETA ETQA, which has the jurisdiction over this field of learning. My assessor will (at the very least) be accredited and have a technical qualification in this learning area.

    I can be assessed in the language of my choice although if I have to report incidents or conditions to someone else, I will be assessed on my ability to report in the language commonly used in my working environment.

    I will be assessed in the workplace but I can submit documents, projects, test results and assignments that were produced outside of the workplace.

    I can be assessed against this unit standard to obtain credits, or as part of an integrated assessment for a qualification. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Names & functions of:
  • Types of resistance welding
  • Types of equipment

    Attributes, descriptions, characteristics & properties:
  • Spot welding
  • Projection welding
  • Seam welding
  • Electrodes

    Sensory cues
  • Smell indicating overheating equipment

    Purpose of:
  • Resistance welding
  • Selecting correct electrodes
  • Safety checks
  • Quality checks

    Processes, events, causes and effects, implications:
  • Implications of using incorrect or defective equipment
  • Effects of welding current, electrode force, welding time and electrode material and design on weld quality
  • Influence of metal characteristics and surface condition on welding parameters
  • Implications of ignoring potential hazards
  • Implications of not checking for welding defects
  • Implications for not preparing workpiece before welding
  • Causes of weld defects

    Procedures and techniques:
  • Set up procedures for resistance welding
  • Resistance welding procedures
  • Preparation for welding
  • Safety procedures
  • Quality procedures
  • Reporting procedures

    Regulations, legislation, agreements, policies, standards:
  • Applicable safety, health and environmental protection legislation and standards

    Theory: rules, principles, laws:
  • Principles of expansion and contraction
  • Basic principles of electricity
  • Electrode classification

    Relationships, systems:
  • Relationship between the welding cycle parameters and the mechanical properties of welded joints 


  • Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems:
  • Recognise problems while welding and respond appropriately
  • Defects are recognised and corrected
  • Hazards are identified and avoided 

  • UNIT STANDARD CCFO WORKING 
    Work together with others:
  • Participate in efforts of workgroup 

  • UNIT STANDARD CCFO ORGANISING 
    Organise and manage myself and my activities:
  • Plan sequence of operations based on job instructions and set up equipment appropriately 

  • UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information:
  • Visually examine quality of weld for non-conformance 

  • UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively:
  • Report outcome of work to appropriate personnel 

  • UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically:
  • Understanding electrical and mechanical principles
  • Characteristics of materials
  • Principles of expansion and contraction 

  • UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems:
  • Explain the role of resistance welding in the fabrication environment 

  • 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
    Elective  22869   National Certificate: Engineering Fabrication  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered" 
    2007-08-16  MERSETA 
    Elective  58722   National Certificate: Engineering Fabrication  Level 2  NQF Level 02  Reregistered  2021-06-30  As per Learning Programmes recorded against this Qual 
    Elective  58720   National Certificate: Engineering Fabrication  Level 3  NQF Level 03  Reregistered  2021-06-30  As per Learning Programmes recorded against this Qual 


    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. Africa International Training Facilities T/A AITF (BREDELL) (TP) 
    2. Belique Training Centre cc (ALBERTON) (TP) 
    3. BELMET TRAINING CENTRE T/A BELMET MARINE (PTY) LTD (Bellville)(TP) 
    4. Bevline Mechanical Projects (Pty) Ltd (PROSPECTON) (TP) 
    5. Blue Horison Properties 53 (Pty) Ltd T/A Durnacol Skills Innovation Hu 
    6. Coastal Kzn F.E.T. College - Swinton Road Campus 
    7. Eastcape Training Centre 
    8. False Bay Public FET College - Westlake Campus 
    9. Gijima AST Holdings (Pty) Ltd T/A Fundi Training Centre (BENONI) (TP) 
    10. Jericho Safety Consultants (Pty) Ltd (TP) 
    11. Majuba FET College - Newcastle Technology Centre 
    12. Mopani South East FET College - Phalaborwa Campus 
    13. Northlink College - Bellville Campus 
    14. Orbit FET College - Rustenburg Campus 
    15. S & S Training & Construction (SPRINGS) (TP) 
    16. Sedibeng Artisan Skills Training Centre (VEREENIGING) (TP) 
    17. SEDIBENG TRAINING CENTRE 
    18. SSS Sheet Metal Work cc T/A Sheetech SA (DURBAN) (TP) 
    19. Steinmuller Africa (Pty) Ltd T/A Steinmuller Technical Training Academ 
    20. THE SAJ COMPETENCY TRAINING INSTITUTE CC 
    21. Umfolozi FET College - Central Office 
    22. Wavelength T.T.I 
    23. West Coast Public FET College - Vredenburg Campus 
    24. Wilbat Projects 148 (Pty) Ltd (ISIPINGO) (TP) 
    25. World Focus 382 cc T/A Richards Bay Technical Training & Assessment Centre (ZCBF) (RICHARDS BAY) (TP) 



    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.