This unit applies to comprehensive preparation as required in a range of environments. It also includes maintaining weld records and rectifying defects. The term 'oxy acetylene' is used here to describe a range of fuel gases, including acetylene, LPG, hydrogen etc.

This unit covers the competencies required for welding quality that would meet the Australian Standard 1554 Special Purpose, appropriate industrial standards, or equivalent outcomes.

Where welds comply with one of the certificates covered by Australian Standard 1796, then Unit MEM05026C (Apply welding principles) should also be selected.

Where advanced manual thermal cutting, gouging and shaping is carried out, Unit MEM05008C (Perform advanced manual thermal cutting, gouging and shaping) should also be selected.

Band: A

Unit Weight: 6

Path 1

MEM05004C

Perform routine oxy acetylene welding

MEM05007C

Perform manual heating and thermal cutting

MEM05051A

Select welding processes

MEM05052A

Apply safe welding practices

MEM09002B

Interpret technical drawing

MEM18001C

Use hand tools

MEM18002B

Use power tools/hand held operations

ELEMENT

PERFORMANCE CRITERIA

1. Select welding equipment and consumables

1.1. Correct welding equipment and consumables are selected from weld procedure specifications.

2. Prepare welding materials and equipment

2.1. Welding equipment and consumables are prepared according to job requirements.

2.2. Welding equipment appropriate to the task is assembled and adjusted correctly and safely.

2.3. Materials are prepared to achieve required weld specification.

3. Assemble welding equipment

3.1. Welding equipment, including cylinders, regulators, hoses, torches and tips is assembled and set up safely in accordance with standard operating procedures.

4. Weld joints to Australian Standard 1554 SP or equivalent

4.1. Materials are welded to Australian Standard 1554 SP or equivalent in all positions.

4.2. Instructions, symbols, specifications are interpreted correctly including bead size, bead placement, reinforcement etc. and in accordance with weld procedure sheet, if available, and standard operating procedures.

5. Inspect welds

5.1. Weld joints are visually inspected against specifications.

5.2. Weld defects are identified.

6. Correct faults

6.1. Defects are removed with minimum loss of sound metal using correct and appropriate techniques and tools to Australian Standard 3992 or equivalent.

7. Maintain weld records

7.1. Weld records are maintained in accordance with specifications and standard operating procedures.

Required skills

Look for evidence that confirms skills in:

selecting equipment and consumables

assembling welding equipment

welding to AS1554 SP

inspecting welds to specification

correcting weld faults to AS3992

entering information on to proformas and standard workplace forms

using hand and power tools to prepare and weld materials

interpreting weld requirements and specifications/procedures

using measurement and numeracy skills for advanced oxy acetylene welding

selecting equipment and consumables appropriate to given task

using visual identification of defects/faults

Required knowledge

Look for evidence that confirms knowledge of:

preparatory requirements

the purpose and examples of pre-welding and post-welding heating of the weld materials

the appropriate settings for the given task and the selected equipment/consumables

the purpose of reinforcing areas to be welded

the methods of weld defect removal and their application

material and consumable properties and characteristics

requirements of AS1554SP and AS3992 or equivalent

fuel gas properties and applications

post treatments

recording procedures

safe welding practices

use and application of personal protective equipment for oxy acetylene welding

relevant hazards and control measures related to the competency

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to perform advanced oxy acetylene welding carried out using a range of materials for general fabrication. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with performing advanced welding using oxy acetylene welding process or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Guidance information for assessment

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Equipment and consumables

Fuel gases, including acetylene, LPG, hydrogen etc., cylinders, regulators, hoses, torches, tips, range of filler rods and fluxes

Weld

Fillet and butt in the horizontal, vertical and overhead positions

Preparing materials

Preheating, setting up of jigs, fixtures, clamps, etc., joint preparation e.g. bevelling

Materials

Low carbon steel, plate, pipe, tube and round bar

Unit sector

Fabrication

This unit contains employability skills.