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Unit of competency details

MEM05017 - Weld using gas metal arc welding process (Release 1)

Summary

Usage recommendation:
Current
Mapping:
MappingNotesDate
Supersedes and is equivalent to MEM05017D - Weld using gas metal arc welding processSupersedes and is equivalent to MEM05017D Weld using gas metal arc welding process 25/Jun/2019

Release Status:
Current
Releases:
ReleaseRelease date
1 1 (this release) 26/Jun/2019


Training packages that include this unit

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 1. Supersedes and is equivalent to MEM05017D Weld using gas metal arc welding process

Application

This unit of competency has been developed for Engineering Tradesperson - Fabrication apprenticeship training and the recognition of trade-level skills in gas metal arc welding (GMAW) on heavy or light metal fabrications. It may also apply to other trade occupations requiring higher level GMAW welding skills.

Weld quality would typically conform to Australian Standard 1554 General Purpose, and American Bureau of Shipping (ABS) or equivalent.

Where manual thermal processes associated with preparation, pre-heat and/or post-heat is required unit MEM05007 Perform manual heating and thermal cutting and unit MEM05008 Perform advanced manual thermal cutting, gouging and shaping, should also be selected as appropriate.

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

Band: A 

Unit Weight: 4 

Pre-requisite Unit

MEM05050

Perform routine gas metal 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 GMAW 

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 to job specification using GMAW 

5.1

Ensure weld deposit is to specifications

5.2

Clean joints to specifications

6

Ensure weld conformance 

6.1

Visually inspect weld joints 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: 

  • ferrous, including carbon or stainless steel
  • non-ferrous metals
  • alloys suitable for GMAW

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) r more of the following: 

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

Unit Mapping Information

Release 1. Supersedes and is equivalent to MEM05017D Weld using gas metal 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 1. Supersedes and is equivalent to MEM05017D Weld using gas metal 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 (SOPs) and safe work practices
  • identifying and interpreting specifications from drawings, sketches and verbal or written job instructions for welding using gas metal arc welding process (GMAW) to the specified standard
  • selecting appropriate weld and joint preparation methods
  • consistently weld materials to the specified standard or equivalent using AC or DC welding machines and electrodes while preventing distortion
  • rectifying any defects
  • completing weld records related to GMAW 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)
  • types of gases and their uses
  • relationships between amperage/wire feed, voltage, gas flow, electrode and material
  • application of weld metal transfer (short arc and spray)
  • correct welding machine, leads, hand pieces and electrodes
  • material preparation
  • weld joint preparations
  • filler wire classification
  • causes of distortion for materials when welded
  • causes of weld defects and methods of rectification
  • standards for GMA welding, including Australian Standard 1554 General Purpose and any other equivalent standards.

Assessment Conditions

  • Assessors must:
  • have vocational competency in welding using GMAW 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 include evidence of 160 hours of workplace practice associated with the skills of this unit in a functioning workplace.
  • All aspects of competent application of the unit must be addressed including prerequisite competency units and associated workplace performance, including environment, 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 and its prerequisites 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.

Links

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