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 would typically 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 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
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 GTAW | 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 GTAW | 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 Statement
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 steel or stainless steel non-ferrous metals aluminium and other materials suitable for GTAW welding |
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 |
Competency Field
Fabrication