This unit covers preparing materials, selecting and setting up the welding equipment, carrying out the gas tungsten arc welding (GTAW) and inspecting for and correcting defects.

Unit details

Study level:
Vocational and further education (TAFE)
Unit code:


MEM05049B - Perform routine gas tungsten arc welding

MEM05051A - Select welding processes

MEM05052A - Apply safe welding practices

MEM12023A - Perform engineering measurements

MEM18001C - Use hand tools

MEM18002B - Use power tools/hand held operations


Assessment tasks will be designed to reinforce and extend knowledge and skill competence within set and controlled parameters in accordance with each unit's learning outcomes and performance criteria requirements, including the setting of work based practical application tasks designed to provide evidence of competence outcomes, within periodic and scheduled timelines. Students will be expected to demonstrate the following required skills: - identifying and interpreting welding specifications including appropriate standards e.g. Australian Standard 1554 General Purpose, American Bureau of Shipping (ABS) or equivalent; - selecting and using appropriate tools and equipment; - using a variety of welding machines and electrodes; - identifying and rectifying weld defects; - applying techniques for distortion prevention and rectification; - cleaning welds; - reading and interpreting information on sketches, written job instructions, specifications, standard operating procedures and engineering drawings; - recording routine information including routine weld records related to GTAW onto proformas and standard workplace forms; - following oral instructions, and; - measurement skills relating to joint preparation and GTAW. Students will also be expected to demonstrate the following knowledge: - correct welding machine, leads, hand pieces and electrodes; - material preparation; - joint preparations; - electrode classification; - causes of distortion for materials within the scope of this unit; - causes of defects and methods of rectification; - the 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; - safe welding practices, and; - use and application of personal protective equipment for GTAW.

Where to next?

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