8593 version 2
11-Dec-96
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
level:
5
credit:
10
planned review date:
June 2002
sub-field:
Diving
purpose:
People credited with this unit standard are able to:
demonstrate: knowledge of NDT methods; complete
magnetic particle inspections; record findings of magnetic
particle inspections; and use ultrasonic testing equipment.
entry information:
Prerequisite: Unit 4417, Dive with surface supplied air
equipment, or demonstrate equivalent knowledge and skills.
accreditation option:
Evaluation of documentation and visit by NZQA and industry.
moderation option:
A centrally established and directed national moderation
system has been set up by the Dive Industry Training
Organisation.
special notes:
1
Industry technical and safety criteria refer to the training
manuals and/or codes of practice of the training
agencies approved by the Dive Industry Training
Organisation.
 New Zealand Qualifications Authority 2016
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11-Dec-96
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
2
All workplace diving practice must comply with the
requirements of the Health and Safety in Employment
Act, 1992 (HSE) and subsequent regulations relating to
Occupational Diving. All practice must also comply with
Accident Rehabilitation and Compensation Insurance
Act, 1992 (ARCI) and Occupational Safety and Health
(OSH) guidelines.
Elements and Performance Criteria
element 1
Demonstrate knowledge of NDT methods.
performance criteria
1.1
Description of magnetism meets industry criteria.
Range:
1.2
principles, magnetic materials, electrically induced magnetic
fields, hysteresis loops, methods of magnetisation.
Explanation of ultrasonic waves meets industry technical and safety criteria.
Range:
compressional waves, pulsed system, Snell’s Law, attenuation,
scattering, acoustic impedance, production of waves, piezoelectric effect, generation of waves.
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
1.3
Explanation of radiography identifies the principles and safety precautions
required.
element 2
Complete magnetic particle inspection.
performance criteria
2.1
Description of equipment used in magnetic particle inspection meets industry
criteria.
Range:
fixed, portable, and transportable installations (DC battery, AC
mains, DC rectified full current), inspection lighting, viewing aids,
marking devices, demagnitisers, contrast aids.
2.2
Pre dive procedures match operation and meet industry technical and safety
criteria.
2.3
Use of equipment is to manufacturer’s specification and meets industry
technical and safety criteria.
Range:
calibration, checks, deployment.
2.4
Use of magnetic detection inks, concentrates, and powders facilitates magnetic
particle inspection.
2.5
Magnetic particle inspection determines solid content.
 New Zealand Qualifications Authority 2016
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11-Dec-96
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
2.6
Demagnetising and post dive procedures match operation and meet industry
technical and safety criteria.
element 3
Record findings of magnetic particle inspection.
performance criteria
3.1
Reporting of indications meets industry technical and safety criteria.
3.2
Surface and sub surface indications identify the type of discontinuity.
3.3
Surface grinding confirms indications.
3.4
Grinding of weld toes and/or parent plate meets required profile
3.5
Reporting and recording of findings meet industry technical and safety criteria.
Range:
transparent tape transfer, lacquer transfer, photographic, narrative
commentary.
 New Zealand Qualifications Authority 2016
8593 version 2
11-Dec-96
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
element 4
Use ultrasonic testing equipment.
performance criteria
4.1
Use of ultrasonic testing equipment is to manufacturer’s specification and
meets industry technical and safety criteria.
Range:
transducers, flaw detector, digital thickness meters, wave probes.
4.2
Calibration of equipment prior to testing meets industry technical and safety
criteria.
4.3
Selection of probe, frequency, and scanning technique matches operation.
4.4
Use of ultrasonic equipment identifies condition of scanned material.
Range:
4.5
surface condition, thickness, internal corrosion.
Reporting and recording of findings meet industry technical and safety criteria.
Range:
written recording, narrative commentary.
 New Zealand Qualifications Authority 2016
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11-Dec-96
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DIVING - OCCUPATIONAL
Complete non destructive testing (NDT)
inspections of dive sites
Comments to:
Dive Industry Training Organisation
Unit Standard Revision
PO Box 160
WELLINGTON
by June 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: 0180]
 New Zealand Qualifications Authority 2016