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Unit of competency details

MEM05020 - Perform advanced welding using gas tungsten arc welding process (Release 2)

Summary

Usage recommendation:
Current
Mapping:
MappingNotesDate
Supersedes and is equivalent to MEM05020C - Perform advanced welding using gas tungsten arc welding processSupersedes and is equivalent to MEM05020C Perform advanced welding using gas tungsten arc welding process 25/Jun/2019

Release Status:
Current
Releases:
ReleaseRelease date
2 (this release) 31/Mar/2021
(View details for release 1) 26/Jun/2019


Classifications

SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030711 Boilermaking And Welding  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030711 Boilermaking And Welding  26/Jun/2019 
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Unit Of competency

Modification History

Release 2. Quantum of hours of workplace practice removed. Supersedes and is equivalent to MEM05020 Perform advanced welding using gas tungsten arc welding process (Release 1).

Release 1. Supersedes and is equivalent to MEM05020C Perform advanced welding using gas tungsten arc welding process.

Application

This unit of competency defines the skills and knowledge required to carry out advanced welding using gas tungsten arc welding (GTAW).

Welds are associated with a range of structural sections and/or plate and/or pipe for general fabrication. Weld quality would typically conform to AS 1554 Structural Purpose or equivalent.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

Band: A 

Unit Weight: 4 

Pre-requisite Unit

MEM05007

Perform manual heating and thermal cutting

MEM05019

Weld using gas tungsten arc welding process

MEM05049

Perform routine gas tungsten arc welding

MEM05051

Select welding processes

MEM05052

Apply safe welding practices

MEM09002

Interpret technical drawing

MEM11011

Undertake manual handling

MEM12023

Perform engineering measurements

MEM12024

Perform computations

MEM13015

Work safely and effectively in manufacturing and engineering

MEM14006

Plan work activities

MEM16006

Organise and communicate information

MEM18001

Use hand tools

MEM18002

Use power tools/hand held operations

Competency Field

Fabrication

Elements and Performance Criteria

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Determine job requirements 

1.1

Follow standard operating procedures (SOPs)

1.2

Comply with work health and safety (WHS) requirements at all times

1.3

Use appropriate personal protective equipment (PPE) in accordance with SOPs

1.4

Identify job requirements from specifications, drawings, job sheets or work instructions

2

Prepare materials for welding 

2.1

Prepare materials to achieve the required weld requirements

2.2

Assemble/align materials to specification, where required

3

Select, assemble and set up welding equipment and consumables 

3.1

Identify and select welding equipment and electrodes, accessories and consumables appropriate to the material

3.2

Assemble and set up AC or DC welding equipment

4

Minimise and rectify distortion 

4.1

Apply appropriate distortion prevention measures

4.2

Rectify any distortion using appropriate techniques

5

Weld joints to specifications using GTAW 

5.1

Ensure weld deposit is to specifications

5.2

Clean joints to specifications

6

Ensure weld conformance 

6.1

Inspect weld joints visually for conformance to specifications

6.2

Rectify any weld defects with minimum loss of sound metal using correct techniques and tools

6.3

Complete weld records, where required

Foundation Skills

This section describes those required skills (reading, writing, oral communication and numeracy) that are essential to workplace performance in this unit of competency.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range of Conditions

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Welds include the following: 

  • fillet and butt welds carried out in all positions

Materials include one (1) or more of the following: 

  • low carbon
  • cast iron
  • stainless and low alloy steel
  • aluminium

Preparation includes one (1) or more of the following: 

  • pre-heating
  • setting up of jigs, fixtures and clamps
  • joint preparation (e.g. bevelling)

Distortion prevention measures include one (1) or more of the following: 

  • pre-heating
  • setting up of jigs
  • fixtures and clamps

Rectify includes the use of one (1) or more of the following: 

  • oxy acetylene
  • air arc equipment
  • grinding devices

Defects include one (1) or more of the following: 

  • porosity
  • slag inclusions
  • discontinuities
  • lack of penetration
  • undercut

Unit Mapping Information

Release 2. Supersedes and is equivalent to MEM05020 Perform advanced welding using gas tungsten arc welding process (Release 1).

Release 1. Supersedes and is equivalent to MEM05020C Perform advanced welding using gas tungsten arc welding process.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2

 

Assessment requirements

Modification History

Release 2. Quantum of hours of workplace practice removed. Supersedes and is equivalent to MEM05020 Perform advanced welding using gas tungsten arc welding process (Release 1).

Release 1. Supersedes and is equivalent to MEM05020C Perform advanced welding using gas tungsten arc welding process.

Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria on at least two (2) occasions and include:

  • following work instructions, standard operating procedures and safe work practices
  • identifying and interpreting specifications from drawings, sketches and verbal or written job instructions for performing advanced welding using gas tungsten arc welding process (GTAW) to AS 1554 Structural Purpose
  • selecting appropriate weld and joint preparation methods
  • consistently weld materials to AS 1554 Structural Purpose or equivalent using AC or DC welding machines and electrodes while preventing distortion
  • rectifying any defects
  • completing and maintaining weld records related to GTAW Structural Purpose onto standard workplace forms.

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)
  • in-depth knowledge of the properties and characteristics of a wide range of materials
  • requirements to conform to AS 1554 Structural Purpose or equivalent
  • weld procedures and requirements
  • different welder identification systems, including numbering, bar coding, paint coding, and letter stamps.

Assessment Conditions

  • Assessors must:
  • have vocational competency in performing advanced welding using GTAW process 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 replacementand comply with the National Vocational Education and Training Regulator Act 2011, its replacementor 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.
  • 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.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=b7050d37-5fd0-4740-8f7d-3b7a49c10bb2