16961 version 2
28-Jun-16
1 of 4
METAL SURFACE FINISHING
Polish welded stainless steel
fabrications
level:
3
credit:
10
planned review date:
December 2002
sub-field:
Mechanical Engineering
purpose:
People credited with this unit standard are, on welded
stainless steel fabrications, able to: prepare for polishing
operations; perform polishing operations; and control
polishing quality.
entry information:
Recommended: prior credit for Unit 2396, Select, use, and
maintain portable hand held engineering power tools, Unit
9184, Erect non-notifiable prefabricated scaffolding, and Unit
12299, Shift loads in the performance of machinery and
equipment installation and maintenance, or demonstrate
equivalent knowledge and skills
accreditation option:
Evaluation of documentation and visit by NZQA.
moderation option:
A national moderation system of regional panels and
assessor networks has been established by Competenz.
special notes:
1
This unit standard covers the skills and knowledge
required to grind and polish welded seams to specified
surface roughness values as required on stainless steel
equipment fabricated for industries such as food
processing, and pharmaceutical.
 New Zealand Qualifications Authority 2016
16961 version 2
28-Jun-16
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METAL SURFACE FINISHING
Polish welded stainless steel
fabrications
2
Worksite procedure refers to the documented
procedures for safety and polishing for a worksite.
Elements and Performance Criteria
element 1
Prepare for polishing operations on welded stainless steel fabrications.
performance criteria
1.1
A safe worksite is assured by identifying potential hazards and following safety
procedures in accordance with worksite safety policy.
Range:
potential hazards may include but are not limited to - risk of
electrocution, risk of fire or explosion, inadequate ventilation,
confined space, chemical, working at heights.
1.2
The polishing equipment selected is in accordance with that specified in the
worksite procedure.
1.3
The polishing consumables selected are in accordance with those specified in
the worksite procedure.
1.4
The surface to be polished is prepared in accordance with the worksite
procedure.
Range:
preparation may include but is not limited to - cleaning, pickling
and passivating, protecting adjacent areas with tape.
 New Zealand Qualifications Authority 2016
16961 version 2
28-Jun-16
3 of 4
METAL SURFACE FINISHING
Polish welded stainless steel
fabrications
element 2
Perform polishing operations on welded stainless steel fabrications.
performance criteria
2.1
Polishing equipment and consumables are used in accordance with the
worksite procedure.
Range:
2.2
Surface is checked at regular intervals during polishing operations to identify
any imperfections that may need rework.
Range:
2.3
equipment may include but is not limited to - grinding wheels and
discs, wire brushes, sanding discs and belts, mops, buffs;
consumables may include but are not limited to - soaps,
lubricants.
rework includes but is not limited to - spot grinding, rewelding,
planishing.
Rework is undertaken, or imperfections reported, in accordance with worksite
procedure.
element 3
Control polishing quality on welded stainless steel fabrications.
performance criteria
3.1
A clean surface is obtained in accordance with worksite procedure.
 New Zealand Qualifications Authority 2016
16961 version 2
28-Jun-16
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METAL SURFACE FINISHING
Polish welded stainless steel
fabrications
3.2
Inspection verifies that the polished surface is in accordance with job
specification.
Range:
3.3
inspection may include but is not limited to - visual examination,
surface method such as penetrant inspection, surface roughness
measurement.
The polished finish is protected from potential damage in accordance with
worksite procedure.
Comments to:
Competenz
Unit Standard Revision
PO Box 160
WELLINGTON
by December 2002.
Please Note:
Providers must be accredited by the Qualifications Authority
before they can offer programmes of education and training
assessed against unit standards.
Accredited providers assessing against unit standards must
engage with the moderation system that applies to those unit
standards. [Please refer to relevant Plan ref: 0013]
 New Zealand Qualifications Authority 2016