SAQA

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SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Weld pipes with the gas tungsten arc welding process in all positions

SAQA US ID	UNIT STANDARD TITLE
12256	Weld pipes with the gas tungsten arc welding process in all positions
ORIGINATOR
SGB Welding
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-
FIELD			SUBFIELD
Field 06 - Manufacturing, Engineering and Technology			Manufacturing and Assembly
ABET BAND	UNIT STANDARD TYPE	PRE-2009 NQF LEVEL	NQF LEVEL	CREDITS
Undefined	Regular	Level 4	NQF Level 04	20
REGISTRATION STATUS		REGISTRATION START DATE	REGISTRATION END DATE	SAQA DECISION NUMBER
Passed the End Date - Status was "Reregistered"		2006-11-07	2007-02-21	SAQA 0160/05
LAST DATE FOR ENROLMENT		LAST DATE FOR ACHIEVEMENT
2008-02-21		2011-02-21

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.

This unit standard is replaced by:

US ID	Unit Standard Title	Pre-2009 NQF Level	NQF Level	Credits	Replacement Status
243054	Weld carbon steel pipe, using the gas tungsten arc welding process in all positions	Level 4	NQF Level 04	20

PURPOSE OF THE UNIT STANDARD

This unit standard is for a learner within the fabrication and welding fields.

A person credited with this unit standard is capable of:

Describe the gas tungsten arc welding process

Select, set up and conduct pre operational checks of gas tungsten arc welding equipment

Prepare work pieces prior to welding

Weld workpieces

Inspect welded work piece for defects in compliance with drawing specifications

Care and store welding consumables and equipment

This unit standard will contribute to the full development of any learner by providing recognition, further mobility and transportability within the field. The knowledge, skills and understanding demonstrated in this unit standard are essential for social and economic transformation and upliftment within the fabrication and welding environment.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

National certificate in welding application and practice level 3.

UNIT STANDARD RANGE

Scope:
Components and parts that have to be assembled must not be heavier than 10 Kg.
Range of materials used is:

Low and medium carbon steel (up to 6mm thick)

Context:

All work undertaken must comply with Occupational Health and Safety Act

All work done must comply with worksite practices

All work done under limited supervision

Level:
Level (for level 4)
A learning programme leading to the award of this unit standard should develop learners who demonstrate:

(a) A foundational knowledge base as indicated in the embedded knowledge component
(b) An understanding of the discipline/field`s fundamental terms, rules, concepts and principles
(c) Familiarity with some of the essential procedures, operations and techniques of this field
(d) An ability to use a range of procedures to solve routine problems
(e) Basic information gathering, analysis and presentation skills
(f) An ability to communicate and present information clearly and reliability following prescribed formats and conventions.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Describe and explain the gas tungsten arc welding equipment.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1.The importance of correct assembly of the gas tungsten arc welding equipment, and the consequences of incorrect assembly, is explained with reference to manufacturer's requirements.

ASSESSMENT CRITERION 2

2. Basic and major components of the gas tungsten arc welding equipment are identified and the explanation of function and purpose is correct in terms of vendor requirements and standards.

ASSESSMENT CRITERION 3

3. Parts and components correctly identified and the implications for incorrect identification explained.

ASSESSMENT CRITERION 4

4. Terms and definitions used are consistent with generally accepted welding terminology as recorded in international welding standards.

ASSESSMENT CRITERION RANGE

Parts include: Welding machine, earth clamp, welding cable, argon gas, flow meter, jubilee clamps, welding torch, consumables, remote foot/hand control unit.

SPECIFIC OUTCOME 2

Select, assemble and conduct pre operational checks of gas tungsten arc welding equipment.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Verification, identification and selection of gas tungsten arc welding equipment as per job requirements.

ASSESSMENT CRITERION 2

2. Identification and rectification of hazards relate to welding process in accordance with standard work site practices.

ASSESSMENT CRITERION 3

3. Pre operational checks are carried out in accordance with manufacturer's specifications.

ASSESSMENT CRITERION 4

4. A safe worksite is created to prevent damage to equipment and injury to people.

ASSESSMENT CRITERION 5

5. Weld and gas flow parameters including polarity are established to satisfy job requirements.

ASSESSMENT CRITERION RANGE

Resources to include: manufacturer's specification, worksite practices, and safety and environmental issues.

ASSESSMENT CRITERION 6

6. Tungsten is identified, selected and prepared to specification and job requirement.

SPECIFIC OUTCOME 3

Prepare pipes prior to welding.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. pipes prepared prior to welding as specified on drawing and worksite practices.

ASSESSMENT CRITERION 2

2. Dimensions and alignment checked as specified on drawing.

ASSESSMENT CRITERION 3

3. pipes tack welded in position as per drawing specifications.

ASSESSMENT CRITERION 4

4. Safety precautions adhered to.

ASSESSMENT CRITERION 5

5. Inspect pipes prior to welding.

ASSESSMENT CRITERION RANGE

Resources include: Worksite practices, tools, equipment, safety requirements and materials.

SPECIFIC OUTCOME 4

Weld pipes.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Welding filler material and gas selected as per job requirements.

ASSESSMENT CRITERION 2

2. Pipes welded in position as per job requirements.

ASSESSMENT CRITERION 3

3. Safety precaution adhered to during welding process.

ASSESSMENT CRITERION 4

4. Pipes cleaned after welding as per worksite practices.

ASSESSMENT CRITERION 5

5. Potential causes for welding defects/imperfections are identified prior to welding and action taken to meet job requirements.

ASSESSMENT CRITERION RANGE

Material type to be welded:
Low carbon steel
Resources include: Welding equipment, tools, protective clothing, equipment, and materials
Welding positions -Materials up to 6mm thick, AWS (American Welding Society) positions 1F, 2F, 3F, 4F, 1G, 2G, 3G, 4G, 6G, (fillet welds :flat, horizontal, vertical, overhead, Butt welds: flat, horizontal, vertical, overhead).

SPECIFIC OUTCOME 5

Inspect welded pipes for defects.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Welded pipes visually and destructively tested and inspected for defects.

ASSESSMENT CRITERION RANGE

Defects (porosity, lack of fusion, under cut, tungsten inclusion, cold lapping, crater cracking, arc strike).

ASSESSMENT CRITERION 2

2. All defects dealt with in accordance to work site practices.

ASSESSMENT CRITERION 3

3. Documentation completed as reflected in worksite practices.

ASSESSMENT CRITERION RANGE

Procedures include: Worksite practices, inspection methods (visual only), and cleaning procedures

SPECIFIC OUTCOME 6

Care and store welding consumables and equipment.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Tools and equipment care for as per manufacturer's specifications and stored as per worksite practices.

ASSESSMENT CRITERION 2

2. Welding consumables stored in accordance with worksite practices.

UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS

Anyone assessing a learner against this unit standard, must be registered as an assessor with the relevant ETQA.

Any institution offering learning that will enable achievement of this unit standard must be accredited in terms of the criteria laid down by the relevant ETQA.

Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines in the relevant qualification and the agreed ETQA procedures.

UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE

Names & functions of:

Gas tungsten arc welding equipment

Consumables

Personal protective equipment

Attributes, descriptions, characteristics & properties:

Types of metals and their properties

Types of gas mixtures and gas pressures

Common defects

Hazards

Purpose of:

Gas tungsten arc welding

Safety checks

Reporting incidents and conditions

Checking completed weld

Sensory cues:

Smell indicating flammable gas leaks

Smell indicating overheating equipment

Processes, events, causes and effects, implications:

Implications of using incorrect gas

Implications of using incorrect gas pressure settings

Causes and responses to defects

Basic welding process

Implications of not preparing workpiece before welding

Procedures and techniques:

Set up procedures for gas tungsten arc welding

Gas tungsten arc welding procedure

Preparation for welding metals

Safety procedures

Quality procedures

Checking procedure

Recording and reporting procedures

Regulations, legislation, agreements, policies, standards:

Applicable safety, health and environmental protection legislation and standards

Theory: rules, principles, laws:

Applicable basic welding theory covering gas tungsten arc process

Relationships, systems:

Relationship of the consumables and the equipment to the metals.

UNIT STANDARD DEVELOPMENTAL OUTCOME

N/A

UNIT STANDARD LINKAGES

N/A

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems:

Recognise problems while welding and respond appropriately

Defects are recognised and corrected

Hazards are recognised and prevented.

UNIT STANDARD CCFO WORKING

Work together with others:

Co-ordinate efforts of workgroup

Coach and guide workgroup members.

UNIT STANDARD CCFO ORGANISING

Organise and manage myself and my activities:

Plan sequence of operations based on job instructions and set up equipment appropriately.

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information:

Visually examine and conduct tests on completed weld to control quality.

UNIT STANDARD CCFO COMMUNICATING

Communicate effectively:

Record information on work done

Report outcome of work to appropriate personnel.

UNIT STANDARD CCFO SCIENCE

Use science and technology effectively and critically:

Understanding of gas mixture, flame settings and gas pressures and their effects on types of metals.

UNIT STANDARD CCFO DEMONSTRATING

Demonstrate an understanding of the world as a set of related systems:

Role of gas tungsten arc welding in the fabrication industry.

UNIT STANDARD ASSESSOR CRITERIA

N/A

UNIT STANDARD NOTES

This unit standard has been replaced by unit standard 243054, which is "Weld carbon steel pipe, using the gas tungsten arc welding process in all positions", Level 4, 20 credits.

This unit standard may be obtained through RPL. The learner should be thoroughly briefed on the mechanism to be used and support and guidance should be provided. Care should be taken that the mechanism used provides the learner with an opportunity to demonstrate competence and is not so onerous as to prevent learners from taking up the RPL option towards gaining a qualification.

Notes to assesors:

Assessors should keep the following general principles in mind when designing and conducting assessments against this unit standard:

Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.

Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.

Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.

The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.

The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.

All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent.

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Core	24213	National Certificate: Welding Application and Practice	Level 3	NQF Level 03	Passed the End Date - Status was "Registered"	2006-12-03	MERSETA
Core	24216	National Certificate: Welding Application and Practice	Level 4	NQF Level 04	Passed the End Date - Status was "Registered"	2006-12-03	MERSETA
Elective	22871	National Certificate: Engineering Fabrication (light or heavy)	Level 4	NQF Level 04	Passed the End Date - Status was "Reregistered"	2007-08-16	MERSETA

PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD:

This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.

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