Application

This unit of competency was developed for post trade engineering fabrication training and the recognition of post trade skills in advanced weld repairs and weld maintenance.
It defines the skills and knowledge required to restore or extend the original fatigue life of a cracked component including advanced weld repair and maintenance on both ferrous and non-ferrous metals, assessment of cracks or defects, removal of cracks, repair weld preparation and performing repair welds as defined in the unit in combination with its prerequisites.
The unit scope includes required welding and material knowledge and skills, knowledge of relevant welding standards, welding terminology and welder qualification requirements
Where the welding associated with this unit also requires the application of welding to codes and standards, the unitMEM05062Apply welding and welding related codes and standards must also be selected. Weld repairs and weld maintenance performed using the skills and knowledge in this unit may or may not be performed in accordance with a weld procedure specification (WPS). Where the welding associated with this unit also requires the welding to be undertaken according to a formal WPS, the unitMEM05068Apply weld procedure specifications must also be selected.
Band: B
Unit Weight: 6

What You'll Learn

Assessment Requirements

Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include the ability to:
• identify at least two types of weld defects or cracks and implications for repair
• identify issues that require escalation or pre-approval due to high risk because of high load, stress, lack of redundancy, or complexity of repair or material
• clean and prepare material for welding
• gouge out at least two existing weld defects or cracks using carbon arc, arc, plasma gouging oxy/fuel or grinding methods
• pre and post-heat base material to specification and maintain correct temperature management during the repair
• assess depth of required repairs including:
• shallow and partial thickness depths
• full thickness repairs requiring backing
• double side access
• full thickness repairs with single side open root
• perform weld repair using at least one of the following weld processes:
• gas metal arc welding (GMAW)
• flux core arc welding (FCAW)
• manual metal arc welding (MMAW)
• gas tungsten arc welding (GTAW)
• oxy/fuel gas.
Note: Where a volume and/or frequency is not specified, demonstration must be provided at least once.

Knowledge Evidence

Evidence required to demonstrate the required knowledge for this unit must be relevant to and satisfy the requirements of the elements and performance criteria and include knowledge of:
• safe welding practices and procedures and use of personal protective equipment (PPE)
• materials which are appropriate for weld removal by gouging and/or grinding
• methods of defect removal including gouging, grinding and chipping
• weld preparation methods for ferrous and non-ferrous metals and alloys
• pre-welding and post-welding heating methods including temperature management
• common weld crack or defect causes and procedures to prevent common weld cracks or defects
• procedures to minimise residual stresses
• the effect of hydrogen on welding and procedures to manage hydrogen content.
• procedures for arranging NDT testing by accredited detesting agencies.

Assessment Conditions

• Assessors must:
• have vocational competency in undertaking advanced weld repair and maintenance at least to the level being assessed with relevant industry knowledge and experience
• satisfy the assessor requirements in the Standards for Registered Training Organisations 2015 or its replacement and comply with the National Vocational Education and Training Regulator Act 2011, its replacement or equivalent legislation covering VET regulation in a non-referring state/territory as the case requires.
• Assessment must occur in a functioning workplace. Where assessment in the workplace would be unsafe, impractical or threatens the environment, assessment must occur in a sufficiently rigorous simulated environment that reflects the circumstances that would be experienced in a functioning workplace. Assessment must cover all aspects of workplace performance, including task skills, task management skills, contingency management skills and job role environment skills.
• Knowledge assessment may be either verbal or written but must adequately reflect the knowledge requirements of the unit in a functioning workplace.
• Conditions for assessment must include access to all tools, equipment, materials and documentation required, including relevant workplace procedures, product and manufacturing specifications.
• Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Foundation Skills

• {'skill': 'Foundation Skills', 'description': 'This section describes those language, literacy, numeracy and employment skills that are essential to performance.\nFoundation skills essential to performance are explicit in the performance criteria of this unit of competency.'}

Prerequisite Units

• MEM05007
• MEM05061
• MEM05071
• MEM05085
• MEM09002
• MEM11011
• MEM12023
• MEM12024
• MEM13015
• MEM14006
• MEM16006
• MEM18001
• MEM18002
• MEM05072
• MEM05073
• MEM05074
• MEM05075
• MEM05084

Parent Qualifications

• MEM40119 — Certificate IV in Engineering
  MEM

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