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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Determine hydraulic pipe sizes 
SAQA US ID UNIT STANDARD TITLE
244687  Determine hydraulic pipe sizes 
ORIGINATOR
SGB Manufacturing and Assembly Processes 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Manufacturing and Assembly 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
The skills, values and knowledge reflected in this unit standard are required by people in the field of Fluid Power Engineering who are required to determine hydraulic pipe sizes and the pressure losses in a hydraulic pipe installation in order to convey the hydraulic fluid in a efficient and safe manner. The learning outcomes in this unit standard contribute to the exit level outcomes required for an NQF Level 5 Qualification.

Persons credited with this unit standard are able to:
  • Determine the inside diameter of a pipe required for a hydraulic system.
  • Select material for a hydraulic pipe.
  • Determine required wall thickness of a pipe.
  • Demonstrate understanding of different connectors used in a pipe installation. 

  • LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The credit calculation is based on the assumption that a person is already competent in terms of the following outcomes when starting to learn towards this unit standard:
  • Identify hose and fluid power connectors at NQF Level 2.
  • Clean fluid power conveyance system at NQF Level 3.
  • Mathematical literacy at NQF Level 3.
  • Demonstrate knowledge of fluid mechanics at NQF Level 5.
  • Demonstrate knowledge of physics relevant to fluid power at NQF Level 5. 

  • UNIT STANDARD RANGE 
  • This standard is limited to simple pipe selections using only the circuit diagram as a reference.
  • Piping includes ISO, EN, DIN, British, ANSI and SAE standards.
  • "Pipe" refers to both pipes and tubes.

    Specific range statements are provided in the body of the unit standard where they apply to particular specific outcomes or assessment criteria. 

  • Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Determine the inside diameter of a pipe required for a hydraulic system. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Required fluid flow is identified for given applications from manufacturer specifications and charts. 

    ASSESSMENT CRITERION 2 
    Recommended fluid velocities within a fluid conveyance system are identified in accordance with standard industry practices. 

    ASSESSMENT CRITERION 3 
    Viscosity is described in terms of its effect on the pipe diameter. 

    ASSESSMENT CRITERION 4 
    Pressure losses are calculated in accordance with pipe diameter and length. 

    ASSESSMENT CRITERION 5 
    The consequences of selecting an incorrect pipe size are described in terms of costs, power losses and heat generation in a hydraulic system. 

    SPECIFIC OUTCOME 2 
    Select material for a hydraulic pipe. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Corrosion is described in terms of its causes and effects to the hydraulic system. 

    ASSESSMENT CRITERION 2 
    The consequences of selecting an incorrect piping material are described in terms of costs and functionality. 

    ASSESSMENT CRITERION 3 
    Material selected is appropriate for the application. 

    SPECIFIC OUTCOME 3 
    Determine required wall thickness of a pipe. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Safety factors to be used in hydraulic piping are determined in accordance with the given application and industry standards. 

    ASSESSMENT CRITERION 2 
    The effect of temperature on pressure rating is explained in accordance with manufacturer specifications. 

    ASSESSMENT CRITERION 3 
    Bending of pipes is described in terms of the effect on wall thickness and allowable pressure. 

    ASSESSMENT CRITERION 4 
    Pressure pulsation is described in terms of its effect on wall thickness of a pipe. 

    SPECIFIC OUTCOME 4 
    Demonstrate understanding of different connectors used in a pipe installation. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Connectors are selected in accordance with application requirements. 

    ASSESSMENT CRITERION 2 
    Methods of attaching connectors to pipes are described in terms of manufacturer specifications. 

    ASSESSMENT CRITERION 3 
    Work methods specified take account of all safety and legal aspects of pipe installations. 

    ASSESSMENT CRITERION 4 
    The effect of joining pipes is described in terms of pressure loss relevant to the type of connector used. 

    ASSESSMENT CRITERION 5 
    Financial implications between different connectors are described in terms of the effect on the overall cost of the system. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited as a provider through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according to the moderation guidelines and the agreed ETQA procedures. 

  • UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Essential embedded knowledge will be assessed through assessment of the specific outcomes in terms of the stipulated assessment criteria. Candidates are unlikely to achieve all the specific outcomes, to the standards described in the assessment criteria, without knowledge of the listed embedded knowledge. This means that for the most part, the possession or lack of the knowledge can be directly inferred from the quality of the candidate's performance. Where direct assessment of knowledge is required, assessment criteria have been included in the body of the unit standard.

    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • Understand functioning of fluid power components.
  • Understand principles of fluid mechanics.
  • SHE requirements.
  • The effect of temperature on materials.
  • The effect of viscosity on pressure loss.
  • The effect of corrosion on the selection of material.
  • The impact of choice of materials and connector types on system costs. 

  • UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems and make decisions using critical and creative thinking.

    Note: The ability of the candidate to understand the importance of the correct sizing of hydraulic piping in a hydraulic system. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as members of a team, group, organisation or community.

    Note: The ability of the candidate to work as a member of a team. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively.

    Note: The ability of the candidate to conduct their work in accordance with workplace requirements. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.

    Note: The ability of the candidate to follow guidelines to select and to apply these in selecting the correct pipe sizing in a hydraulic system. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively, using visual, mathematical and/or language skills in the modes of oral and/or written presentations.

    Note: The ability of the candidate to communicate requirements. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically showing responsibility towards the environment and health of others.

    Note: The ability of the candidate to interpret fluid characteristics and select the correct pipe sizes. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.

    Note: The ability of the candidate to specify pipe sizes applicable to a given situation. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Notes to Assessors:

    Assessors should keep the following principles in mind when designing and conducting assessments against this unit standard:
  • Focus the assessment activities on gathering evidence in terms of the main outcome expressed in the title to ensure assessment is integrated rather than fragmented. Remember we want to declare the person competent in terms of the title. Where assessment at title level is unmanageable, then focus assessment around each specific outcome, or groups of specific outcomes.
  • Make sure evidence is gathered across the entire range, wherever it applies. Assessment activities should be as close to the real performance as possible, and where simulations or role-plays are used, there should be supporting evidence to show the candidate is able to perform in the real situation.
  • Do not focus the assessment activities on each assessment criterion. Rather make sure the assessment activities focus on outcomes and are sufficient to enable evidence to be gathered around all the assessment criteria.
  • The assessment criteria provide the specifications against which assessment judgements should be made. In most cases, knowledge can be inferred from the quality of the performances, but in other cases, knowledge and understanding will have to be tested through questioning techniques. Where this is required, there will be assessment criteria to specify the standard required.
  • The task of the assessor is to gather sufficient evidence, of the prescribed type and quality, as specified in this unit standard, that the candidate can achieve the outcomes again and again and again. This means assessors will have to judge how many repeat performances are required before they believe the performance is reproducible.

    All assessments should be conducted in line with the following well documented principles of assessment: appropriateness, fairness, manageability, integration into work or learning, validity, direct, authentic, sufficient, systematic, open and consistent. 

  • QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  58883   National Certificate: Fluid Power  Level 5  Level TBA: Pre-2009 was L5  Reregistered  2023-06-30  MERSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 



    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.