Unit of competency

Modification History

Release 1. Supersedes and is equivalent to MEM05019 Weld using gas tungsten 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 tungsten arc welding (GTAW) on heavy or light metal fabrications. It may also apply to other trade occupations requiring higher level GTAW welding skills.

Weld quality must conform to AS 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, the unit MEM05007 Perform manual heating and thermal cutting and the unit MEM05071 Perform advanced manual thermal cutting, gouging and shaping, must 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

MEM05049 Perform routine gas tungsten arc welding

MEM05052 Apply safe welding practices

MEM05085 Select welding processes

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

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

Unit Mapping Information

Release 1. Supersedes and is equivalent to MEM05019 Weld 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 1. Supersedes and is equivalent to MEM05019 Weld 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 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 welding using gas tungsten arc welding process (GTAW) to the specified standard
• selecting appropriate weld and joint preparation methods
• consistently weld materials to the specified standard using alternating current (AC) or direct current (DC) welding machines and electrodes while preventing distortion
• rectifying any defects
• completing weld records related to GTAW 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)
• correct welding machine, leads, hand pieces and electrodes
• material preparation
• joint preparations
• electrode classification
• causes of distortion for materials when welded
• causes of defects and methods of rectification
• relationships between amperage, electrode and material
• types of gases and their uses
• types of electrodes, current settings and high frequency voltage
• filler materials and consumables
• standards for GTAW welding, AS 1554 General Purpose and other equivalent standards.

Assessment Conditions

• Assessors must:

• have vocational competency in 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