9575 version 4
Page 1 of 3
Explain the purpose and application of cathodic protection in a
petrochemical workplace
Level
4
Credits
2
Purpose
This unit standard is for people employed in the petrochemical industry.
People credited with this unit standard are able to explain the purpose and
application of cathodic protection in a petrochemical workplace,
Subfield
Petrochemical Industry
Domain
Petrochemical Cathodic Protection
Status
Registered
Status date
20 February 2009
Date version published
20 February 2009
Planned review date
31 December 2013
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
(MITO)
Accreditation and Moderation Action Plan (AMAP) reference
0114
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Performance of elements of this unit standard must comply with relevant site
requirements and manufacturer’s recommendations.
2
This unit standard is intended for, but is not limited to, workplace assessment. While
all performance criteria must be met it is noted that all range statements within this
unit standard are indicative and dependent on enterprise and site specific equipment,
procedures, and practices. Any queries can be directed to the NZ Motor Industry
Training Organisation (Incorporated) (MITO).
 New Zealand Qualifications Authority 2016
9575 version 4
Page 2 of 3
3
Definitions
Holiday detection refers to non-destructive testing for locating discontinuities,
pinholes, and voids in surface and pipeline coatings.
Site requirements mean the site specific documented methods for performing work
activities and include health, safety, environmental, and quality management
requirements. They may refer to manuals, codes of practice, or policy statements.
Elements and performance criteria
Element 1
Explain the purpose and application of cathodic protection in a petrochemical workplace.
Performance criteria
1.1
The explanation establishes the purpose and use of cathodic protection
accordance with site requirements.
1.2
The explanation establishes reasons for the survey of cathodic protection
systems in accordance with site requirements.
1.3
The explanation describes cathodic protection system corrosion prevention
techniques in accordance with site requirements.
Range
galvanic, impressed current.
1.4
The explanation identifies causes of corrosion in workplace systems that require
cathodic protection.
1.5
The survey of a cathodic protection system by Holiday detection is described in
accordance with manufacturer’s recommendations.
1.6
The explanation identifies international cathodic protection standards applied in
the workplace.
1.7
The explanation describes the purpose of equipment in the workplace cathodic
protection system.
Range
rectifier impressed current, anode beds, galvanic anodes, test
points, corrosion coupons.
1.8
The explanation identifies the voltage range of a cathodic protection system in
accordance with site requirements.
1.9
The explanation identifies cathodic protection survey equipment and describes
its purpose in accordance with site requirements.
Range
copper sulphate half cell, multi-meter, data logger, cathodic
protection system interruption device, direct current voltage
gradient meter, pipe locator, flange isolation tester, current
measuring swain clamps.
 New Zealand Qualifications Authority 2016
9575 version 4
Page 3 of 3
Please note
Providers must be accredited by NZQA, 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 NZQA 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 NZ Motor Industry Training Organisation (Incorporated) (MITO)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016