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
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 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: | 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 |
Competency Field
Fabrication