NZQA registered unit standard
2385 version 6
Page 1 of 3
Title
Repair porosity in metal castings using the impregnation method
Level
2
Credits
3
Purpose
People credited with this unit standard are able to: prepare for
the impregnation of castings; carry out the repair of castings
using the impregnation method; and test castings after repair and
complete documentation.
Classification
Mechanical Engineering > Metal Casting
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 21911, Demonstrate knowledge of safety on engineering
worksites; and Unit 21912, Apply safe working practices on an
engineering worksite; or demonstrate equivalent knowledge and
skills.
Explanatory notes
1
References
Health and Safety in Employment Act 1992;
Resource Management Act 1991;
Hazardous Substances and New Organisms Act 1996;
Health and Safety Guidelines on the Management of Hazards in the Metal Casting
Industry. New Zealand: Casting Technology NZ Inc and Occupational Safety and
Health (OSH), 1997. Available at:
http://www.osh.dol.govt.nz/order/catalogue/ipp/metalcasting.pdf.
2
Definition
Worksite procedures – operational procedures put in place by the candidate’s
employer. These include site safety procedures, equipment operating procedures,
job procedures, and procedures for the handling and disposal of materials and waste.
3
Assessment Information
a
All activities must comply with relevant legislative and/or regulatory
requirements, which include, but are not limited to those listed in the references.
b
All work practices must meet documented worksite procedures (where these
exceed code) for personal, product and worksite safety.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2385 version 6
Page 2 of 3
Outcomes and evidence requirements
Outcome 1
Prepare for the impregnation of castings.
Evidence requirements
1.1
Process requirements and specification for castings are determined in accordance
with worksite procedure and/or client requirements.
1.2
Sealant level in the autoclave is set in accordance with the size of castings.
Outcome 2
Carry out the repair of castings using the impregnation method.
Evidence requirements
2.1
Castings are prepared in the autoclave in accordance with worksite procedures.
2.2
Autoclave is operated and process applied in accordance with worksite
procedures.
Range
vacuum or pressure.
2.3
Castings are removed from autoclave, excess sealant is removed, and sealant
cured in accordance with worksite procedures.
2.4
Autoclave is drained of sealant, and is cleaned in accordance with worksite
procedures.
Outcome 3
Test castings after repair and complete documentation.
Evidence requirements
3.1
Repaired castings are pressure tested in accordance with worksite procedures.
Range
water or oil.
3.2
Any castings not complying with specification are identified and/or marked and
segregated in accordance with worksite procedures.
3.3
Documentation is completed in accordance with worksite procedures.
Planned review date
Competenz
SSB Code 101571
31 December 2014
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2385 version 6
Page 3 of 3
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
25 October 1994
31 December 2012
Revision
2
14 April 1997
31 December 2012
Revision
3
5 January 1999
31 December 2012
Review
4
19 October 1999
31 December 2012
Review
5
19 May 2006
N/A
Rollover and
Revision
6
17 November 2011
N/A
Consent and Moderation Requirements (CMR) reference
0013
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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 Competenz qualifications@competenz.org.nz if you wish to suggest
changes to the content of this unit standard.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016