NZQA registered unit standard
23067 version 2
Page 1 of 3
Title
Describe the operation and control of a glass furnace
Level
3
Credits
20
Purpose
People credited with this unit standard are able to describe the
operation and control of a glass furnace.
Classification
Glass and Glazing > Glass Container Manufacturing
Available grade
Achieved
Entry information
Unit 23066, Demonstrate basic knowledge of glass furnace
structure and operations; and Unit 18770, Perform analytical
tests for batch and glass quality in glass container
manufacturing; or demonstrate equivalent knowledge and
skills.
Recommended skills
and knowledge
Outcomes and evidence requirements
Outcome 1
Describe the operation and control of a glass furnace.
Evidence requirements
1.1
Glass furnace heating terminology is described.
Range
1.2
Furnace firing methods are identified and their operation described.
Range
1.3
terminology – combustion, perfect (stoichiometric) combustion,
incomplete combustion, primary air flue gas analysis, excess
oxygen analysis, oxidising flames, radiation, convection,
conduction, electro-boost, burners.
methods – gas and reversals, diesel.
Furnace combustion air flow and exhaust control equipment are identified and
their operation described.
Range
Competenz
SSB Code 101571
equipment – flues, regenerators, stack, stack-breaker, dampers,
electro static precipitator.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.4
Combustion process control parameters are identified, and the methods for
controlling them are described.
process control parameters – furnace pressure, flue purging, inglass temperature, above-glass temperature, in-block
temperature, excess oxygen, gas flow, air flow, combustion air,
bridge wall optical temperature.
Range
1.5
23067 version 2
Page 2 of 3
Furnace batch charging control parameters and their purpose are described.
batch charging control parameters – batch charger speed and
oscillation, batch pattern, batch moisture, batch segregation, glass
level, bubblers.
Range
Replacement information
This unit standard and unit standard 23068 replaced unit
standard 18923.
Planned review date
31 December 2019
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
20 November 2006
31 December 2017
Review
2
16 April 2015
N/A
Consent and Moderation Requirements (CMR) reference
0134
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 (CMRs). 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.
Competenz
SSB Code 101571
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
23067 version 2
Page 3 of 3
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