20591 version 2
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Braze refrigerator pipe work in electrical appliance servicing
Level
3
Credits
3
Purpose
This unit standard covers the techniques required to braze refrigerator pipe
work in a safe manner and is intended for use in the training of electrical
service technicians.
People credited with this unit standard are able to:
–
identify the sources and nature of welding and brazing hazards, and
describe obligations under the Health and Safety in Employment Act
1992;
–
describe and demonstrate safe use of brazing equipment; and
–
braze refrigerator pipe work.
Subfield
Electrical Engineering
Domain
Electrical Appliance Servicing
Status
Registered
Status date
20 June 2006
Date version published
20 June 2006
Planned review date
31 December 2011
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
ElectroTechnology Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0003
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Electrical safety and proper workshop practices are to be maintained at all times.
 New Zealand Qualifications Authority 2016
20591 version 2
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2
References
Health and Safety in Employment Act 1992; Hazardous Substances and New
Organisms Act 1996; and their subsequent amendments and replacements;
BOC Gases New Zealand Limited, Material Safety Data Sheets, available at
http://www.boc.co.nz;
NZS 4781:1973 Code of practice for safety in welding and cutting.
3
Range
oxy-acetylene or oxy-liquefied petroleum gas (LPG).
4
Definition
Industry practice – those practices, which competent practitioners within the industry
recognise as current industry best practice.
Elements and performance criteria
Element 1
Identify the sources and nature of welding and brazing hazards, and describe obligations
under the Health and Safety in Employment Act 1992.
Performance criteria
1.1
Welding and/or brazing hazards and their sources are identified.
Range
1.2
The worksite is checked for potential hazards.
Range
1.3
responsibility for their own health and safety, responsibility for
ensuring their actions do not harm anyone else.
The obligations of employers under the Act as they pertain to the welding
industry are outlined.
Range
1.5
may include – confined space, presence of flammable and/or
explosive materials or containers, defective equipment, hot metal,
hard and/or hot particles.
The obligations of employees under the Act are outlined.
Range
1.4
burns (radiation, body), fume, asphyxiation, noise, hard and/or hot
particles, chemical (cleaning, pickling and passivating agents),
dust.
elimination, isolation, or minimisation of welding hazards.
Personal protective equipment is identified to suit the worksite requirements for
the hazards present.
Range
overalls, boots, gloves, apron, eye protection, ear protection, face
masks.
 New Zealand Qualifications Authority 2016
20591 version 2
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Element 2
Describe and demonstrate safe use of brazing equipment.
Performance criteria
2.1
The operation of brazing equipment is described.
Range
equipment – cylinders, flashback arrestors, regulators, hoses,
protective equipment, blow pipe.
2.2
‘O’ ring maintenance and tip cleaning procedures are described and
demonstrated.
2.3
Set up procedure is described and demonstrated in accordance with industry
practice.
2.4
Lighting up procedures are described and demonstrated in accordance with
industry practice.
2.5
Flame types, their purpose, and precautions to be observed with each are
described.
Range
carburising, neutral, oxidising.
2.6
Shutting down and storage procedure is described and demonstrated in
accordance with industry practice.
2.7
Safety practices are described.
Range
protection, ventilation, cleaning chemicals and equipment, caustic
fumes, gas pressures.
Element 3
Braze refrigerator pipe work.
Range
copper to copper, copper to steel, copper to brass; using Easyflo, Silfos, brass,
and other appropriate fluxes.
Performance criteria
3.1
Pipe ends are prepared.
Range
swage, ream, wire brush, emery cloth, chemically.
3.2
Rods, flux, and tips are selected to match the application.
3.3
The completed joint is neat with minimal component distortion.
Range
joint appearance, capillary action, finish, strength, ductility.
 New Zealand Qualifications Authority 2016
20591 version 2
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3.4
Brazed pipe work is flushed and pressure tested in accordance with appliance
manufacturer’s instructions, and any defects are corrected.
Please note
Providers must be accredited by the Qualifications Authority, or an inter-institutional body
with delegated authority for quality assurance, before they can report credits from
assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the ElectroTechnology Industry Training Organisation
reviewcomments@etito.co.nz if you wish to suggest changes to the content of this unit
standard.
 New Zealand Qualifications Authority 2016