Unit of competency details

PMBWELD308B - Install PVC plastic pressure pipelines (Release 1)


Usage recommendation:
Is superseded by and equivalent to PMBWELD308 - Install PVC plastic pressure pipelinesSupersedes and is equivalent to PMBWELD308B Install PVC plastic pressure pipelines 21/Jun/2016
Supersedes and is equivalent to PMBWELD308A - Install PVC plastic pressure pipelinesEquivalent 30/Apr/2011

ReleaseRelease date
1 1 (this release) 01/May/2011


SchemeCodeClassification value
ASCED Module/Unit of Competency Field of Education Identifier 030305 Materials Engineering  

Classification history

SchemeCodeClassification valueStart dateEnd date
ASCED Module/Unit of Competency Field of Education Identifier 030305 Materials Engineering  25/Nov/2008 
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Modification History

Not applicable.

Unit Descriptor

Unit descriptor 

This competency covers installing and designing relevant elements of polyvinylchloride (PVC) plastic pressure pipes and pipeline components under industrial conditions in the field.

This competency is performed by operators as part of a work team.

Application of the Unit

Application of this unit 

This competency applies to operators who are involved in the installation and design of relevant elements of polyvinylchloride (PVC) plastic pressure pipes and pipeline components to quality assurance requirements whilst maintaining personal and immediate site safety.

The key features in attaining the required quality are:

  • identifying alternative PVC materials being used in the installation as being suitable for specific applications
  • identifying applications for alternative jointing technologies
  • determining appropriate methods of handling, storage, and transport of PVC plastic components
  • identifying and carrying out service connection, and repair techniques
  • assessing quality of completed installations by determining appropriate testing and commissioning procedures.

End applications include pipelines transmitting gas and liquids.

Licensing/Regulatory Information

Not applicable.



This unit has no  prerequisites.

Employability Skills Information

Employability Skills 

This unit contains employability skills.

Elements and Performance Criteria Pre-Content


Elements describe the essential outcomes of a unit of competency


Performance criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the evidence guide.

Elements and Performance Criteria




Performance criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the evidence guide.

1. Identify PVC pipe materials as being suitable for specific pressure applications.

1.1 Identify materials as UPVC, MPVC, OPVC grades from national standards, job specifications and worksite instructions.

1.2 Determine UPVC, MPVC, OPVC materials properties from national standards and material data sheets.

1.3 Identify job needs from worksite instructions and specifications.

2. Identify applications for alternative jointing technologies.

2.1 Identify properties and limitations of mechanical jointing systems.

2.2 Identify properties and limitations of chemical bonding jointing systems.

2.3 Perform trial jointing for all methods, identify non-conformance, report and rectify.

2.4 Assess quality against specification requirements.

3. Determine methods for handling, storage, transport and installation of PVC pipeline components.

3.1 Identify requirements for handling and transport of PVC materials.

3.2 Determine requirements for long term storage.

3.3 Determine requirements for installation including additional materials.

4. Identify appropriate service connection and repair techniques.

4.1 Determine service connection requirements.

4.2 Identify alternative service connection methods to meet requirements.

4.3 Perform service connection to meet requirements.

4.4 Determine repair requirements.

4.5 Identify alternative repair options.

4.6 Perform repair installation to meet requirements.

5. Assess quality of completed installation by determining appropriate testing and commissioning procedures.

5.1 Determine specific installation test requirements.

5.2 Identify alternative test procedures to meet requirements.

Required Skills and Knowledge

This describes the essential skills and knowledge and their level required for this unit.

Knowledge and understanding of PVC materials and pipeline components in the forms of UPVC, MPVC and OPVC, as described in national standards, to recognise suitability for specific installation and to establish work instructions.

Knowledge of specific job requirements necessary to determine detailed work instructions and the ability to implement requirements to attain required quality outcomes.

Competence includes the ability to:

  • identify types of PVC materials and components being used
  • establish specific job needs
  • set up and maintain safe working environment
  • set up and maintain required storage, handling, and transport instructions
  • establish installation requirements
  • perform jointing and installation to meet required quality levels
  • identify and rectify fault causes arising from application and component variability
  • establish completion test requirements
  • establish and maintain quality records.

Language , literacy and numeracy requirements 

Read material which is sequenced for instructions, explanations, information or opinions.

Write short and simple messages about routine tasks or activities, or complete forms.

Use hands-on real-life materials and pictures/diagrams based on personal experience and prior knowledge.

Use several pieces of related mathematical information.

Read, write and speak whole numbers and money sums, recognise and interpret simple fractions, decimals and percentages, use simple data, grid references.

Use simple grammatical forms and vocabulary to give instructions, give explanations, ask questions and express viewpoints.

Clarify intended meaning by asking for repetition when listening, and varying speed and changing tone or emphasis when speaking.

Use strategies such as providing verbal and non-verbal feedback in order to show interest or attitude.

Evidence Guide

The Evidence Guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, the range statement and the assessment guidelines for this training package.

Overview of assessment 

A holistic approach should be taken to the assessment.

Assessors must be satisfied that the person can consistently perform the unit as a whole, as defined by the Elements, Performance Criteria and skills and knowledge.

Critical aspects for assessment and evidence required to demonstrate competency in this unit 

It is essential that the installation meets the requirements of the standard.

Assessment method and context 

Assessment will occur using industrial PVC pipes and installation equipment and will be undertaken in a work-like environment.

Competence in this unit may be assessed:

  • using an appropriate, industrial equipment, situations and polymers
  • in a situation allowing for the generation of evidence of the ability to recognise, anticipate and respond to problems
  • by using a suitable simulation and/or a range of case studies/scenarios
  • through a combination of these techniques.

In all cases it is expected that practical assessment will be combined with targeted questioning to assess the underpinning knowledge and theoretical assessment will be combined with appropriate practical/simulation or similar assessment. Assessors need to be aware of any cultural issues that may affect responses to questions.

Assessment processes and techniques must be culturally appropriate and appropriate to the oracy, language and literacy capacity of the assessee and the work being performed.

Specific resources for assessment 

This section should be read in conjunction with the Range Statement for this unit of competency. Resources required include suitable access to an operating plant or equipment that allows for appropriate and realistic simulation. A bank of case studies/scenarios and questions will also be required to the extent that they form part of the assessment method. Questioning may take place either in the workplace, or in an adjacent, quiet facility such as an office or lunchroom. No other special resources are required.

Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.

Range Statement


The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.

Where reference is made to industry codes of practice and/or Australian/international standards, the latest version must be used.


This competency unit includes the installation of relevant elements of polyvinylchloride (PVC) pressure pipeline components in the form of UPVC, MPVC and OPVC. The end applications include pipelines used for transmission of gaseous and water based fluids.

It also includes the operation of alternative jointing procedures, service connections and repairs using all relevant ancillary equipment.


All operations are performed in accordance with procedures.

Procedures include all relevant workplace procedures, work instructions, temporary instructions and relevant industry and government codes and standards. These may include:

  • AS/NZS 1477 UPVC
  • AS/NZS 4441OPVC
  • AS/NZS 4765 MPVC
  • AS/NZS 2566
  • AS/NZS 2032.

Tools and equipment 

This competency includes use of equipment and tools such as:

  • mechanical and chemical bond jointing equipment, and ancillary jigs and fixtures
  • measurement devices, including pressure gauges, timers, calipers and computer-based monitors
  • calculators
  • service connection and repair equipment and products
  • relevant safety equipment
  • comprehensive work instructions.


Typical hazards include:

  • hazardous cleaning and chemical bonding fluids
  • pipe material handling
  • heavy stationary and moving machinery
  • cutting and heating components.


'Anticipate and solve problems' means resolve a wide range of routine and non-routine problems, using product and process knowledge to develop solutions to problems which do not have a known solution/a solution recorded in the procedures.

Typical process and product problems may include:

  • variable materials, and pipes and components as supplied
  • equipment malfunction or wear and tear
  • variable field site conditions
  • limitations in available data on specific job requirements.

Unit Sector(s)

Not applicable.