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Occupational Certificate: Medical Gas System Installer 
117334  Occupational Certificate: Medical Gas System Installer 
Development Quality Partner - CHIETA 
-   OQSF - Occupational Qualifications Sub-framework 
Occupational Certificate  Field 06 - Manufacturing, Engineering and Technology  Manufacturing and Assembly 
Undefined  353  Not Applicable  NQF Level 04  Regular-ELOAC 
Registered  SAQA 12129/20  2020-07-30  2025-07-30 
2026-07-30   2029-07-30  

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 qualification does not replace any other qualification and is not replaced by any other qualification. 

The purpose of this qualification is to prepare a learner to function as a Medical Gas System Installer. Medical Gas System Installers install, construct, inspect, maintain, modify, repair and perform commissioning activities on medical gas systems. Medical gases include but not limited to medical oxygen, medical air, nitrous oxide, etenox.

A qualified learner will be able to:
  • Construct and install gas systems as per the scope of work.
  • Perform commissioning activities on gas systems.
  • Conduct handover sessions when required by the scope of work with the end-user Inspect, maintain and repair gas systems to required legal requirements.
  • Modify gas systems according to engineering management of change (EMOC) requirements.

    The South African gas industry is highly regulated, and legislation requires gas practitioners to have formally recognised qualifications. It is a growing industry with an increasing demand for gas systems in domestic, commercial and industrial settings.

    Medical gases have a wide range of application in the health sector. Medical gas systems in hospitals are lifesaving. These assemblies supply piped oxygen, nitrous oxide, nitrogen, carbon dioxide, and medical air to hospital areas such as patient rooms, recovery areas, operating rooms, and more. The medical gases used in anaesthesia and intensive care are oxygen, nitrous oxide, medical air, entonox, carbon dioxide and heliox. Oxygen is one of the most widely used gases for life-support and respiratory therapy besides anaesthetic procedures.

    Various industries in South Africa will benefit by implementing the cost-effective and improved processes that gas options provide. Industries such as healthcare, manufacturing, food and beverage will benefit from better service delivery which includes consistency in safety and quality standards according to the national and international requirements. Competent practitioners in the gases industry delivering competent and quality services will ensure safety and quality of health care facilities and provision of consistent health care to clients. It also opens opportunities to industry to introduce new manufacturing technologies requiring gas supply.

    The spinoff of the safe supply of gas through competent service providers is enormous, e.g. reducing the risk footprint in the country, reducing the possibility of incidents and reducing economic losses. It will make South Africa more attractive in the international market for the manufacturing of products, through cost-cutting technologies relying on gas supply.

    This qualification will contribute to the full development of the learner within the gas installation industry by providing recognition as well as further mobility within the gas field. The skills, knowledge and understanding demonstrated within this qualification are essential for social and economic transformation. They will contribute to progression and economic growth within the gas installation and maintenance industry.

    This qualification has been designed to meet the training needs expressed by the gas industry for the following gas categories: Flammable gases, food and beverage gases, inert gases, medical gases, oxidant gases and speciality gases. This will contribute towards the development of competence in the installation and maintenance of gas equipment and systems.

    A Medical Gas System Installer will be equipped to follow an independent career in gas installations and maintenance. The majority of learners for this qualification are likely to be learner-installers in small independent gas companies, and it is foreseen that the learners will eventually be able to independently run their own gas installation and maintenance operations. However, employment in big companies is also a possibility.

    This occupation co-exists with similar occupations. The following proficiencies recognised by the industry as employment opportunities were identified in this occupation:
  • Flammable Gas System Installer.
  • Food and Beverage Gas System.
  • Installer Inert Gas System Installer.
  • Oxidant Gas System Installer.
  • Speciality Gas System Installer.

    During the development of this occupational qualification the above-mentioned proficiencies were provided for as part qualifications. Prospective learners include school leavers who wish to pursue a career in the gas industry as well as persons currently employed or operating in the gas industry but with no formal recognition for their skills.

    Through the employment of competent installation personnel, employers and, in turn, the field and sub-field, will have confidence that this critical work in the industry is safely and efficiently carried out. 

    Recognition of Prior Learning (RPL):
    RPL for Access to the External Integrated Summative Assessment:
    Accredited providers and approved workplaces must apply the internal assessment criteria specified in the related curriculum document to establish and confirm prior learning. Accredited providers and workplaces must confirm prior learning by issuing a statement of results or by certifying a work experience record.

    RPL for Access to the Qualification:
    Accredited providers and approved workplaces may recognise prior learning against the relevant access requirements.

    Entry Requirements:
    NQF Level 2 qualification with Mathematics. 


    This qualification is made up of the following compulsory Knowledge, Practical Skills and
    Work Experience Modules:

    Knowledge Modules:
  • 642603-000-00-00-KM-01, Basic Gas Science, Technology and Gas Systems, Level 2, 6 Credits.
  • 642603-000-00-00-KM-02, Intermediate Gas Science for Gas Systems, Level 3, 6 Credits.
  • 642603-000-00-00-KM-03, Gas Science and Physics for Gas Installations Interpretation, Level 4, 12 Credits.
  • 642603-000-00-00-KM-04, Gas Systems Drawings and Design Interpretation, Level 3, 12 Credits.
  • 642603-000-00-00-KM-05, Occupational Health, Safety, Risk Environment and Quality in the Gas Industry, Level 3, 8 Credits.
  • 642603-000-00-00-KM-06, Gas Installation Business Practices, Level 4, 4 Credits.
  • 642603-000-00-00-KM-07, Basic Electrical Management System used in the Gas Industry, Level 4, 12 Credits.
  • 642603-000-00-00-KM-08, Tools, Equipment and Machinery used in Gas Installations, Level 2, 4 Credits.
  • 642603-000-00-00-KM-09, Pipe Welding for Gas Installations, Level 3, 8 Credits.
  • 642603-000-00-00-KM-10, Introduction to Gas Standards, Level 3, 8 Credits.
  • 642603-000-00-00-KM-11, Gas Technology and Systems, Level 4, 4 Credits.
  • 642603-000-00-00-KM-12, Gas System Installation and Construction, 4, 4 Credits.
  • 642603-000-00-00-KM-13, Gas System Maintenance Decommissioning and Re-commissioning, Level 4, 4 Credits.
  • 642603-000-00-00-KM-17, Medical Gas Systems and Technology, Level 5, 24 Credits.

    The total number of credits for Knowledge Modules: 116.

    Practical Skill Modules:
  • 642603-000-00-00-PM-01, Machinery for Installation of Gas Systems, Level 2, 4 Credits.
  • 642603-000-00-00-PM-02, Weld and Gas Cut Components for Gas, Installations, Level 3, 36 Credits.
  • 642603-000-00-00-PM-03, Construct Pipe Work for Gas Installations, Level 3, 8 Credits.
  • 642603-000-00-00-PM-04, Construct and Install a Legally and Code Compliant Gas System, Level 4, 12 Credits.
  • 642603-000-00-00-PM-05, Inspect, Test and Confirm Gas System Compliance with Design and Scope, Parameters, Level 4, 12 Credits.
  • 642603-000-00-00-PM-06, Assess Gas Equipment or System Troubleshoot Problems and Repair or, Replace Faulty Equipment or System, Level 4, 8 Credits.
  • 642603-000-00-00-PM-07, Adhere to Safe Work Practices in the Gas Industry, Level 3, 3 Credits.
  • 642603-000-00-00-PM-11, Install, Maintain, Repair and Modify Medical Gas Systems, Level 5, 10 Credits.

    The total number of credits for Practical Skill Modules: 93.

    Work Experience Modules:
  • 642603-000-00-00-WM-01, Gas System On-Site Construction and Installation, Level 4, 50 Credits.
  • 642603-000-00-00-WM-02, Gas System Commissioning, Certification and Handover Processes, Level 4, 30 Credits.
  • 642603-000-00-00-WM-03, Corrective, Planned and Statutory Maintenance Processes of Gas Systems, Level 4, 20 Credits.
  • 642603-000-00-00-WM-04, Gas System Modification, Level 4, 20 Credits.
  • 642603-000-00-00-WM-08, Medical Gas Systems Installation, Repair, Maintenance and Modification, Level 5, 24 Credits.

    The total number of credits for Work Experience Modules: 144. 

    1. Demonstrate an understanding of the underpinning theory of medical gas and medical gas systems.
    2. Compile a bill of materials for a legally compliant medical gas system.
    3. Assemble, construct and test a medical gas system based on volume, pressure and integrity according to medical gas system demand, design and standards which are legal and code compliant.
    4. Commission and conduct a final sign-off of a legally and code compliant medical gas system.
    5. Conduct fault finding and take remedial action on a medical gas system or maintain installation to ensure safe working conditions of the system.
    6. Comply with safety and quality industry codes and legal aspects when installing a medical gas system and working with gases. 

    Associated Assessment Criteria for Exit Level Outcome 1:
  • Describe gas properties of a range of gases with reference to the specific medical gas system.
  • Analyse medical gas systems and identify components and explain the function of each.
  • Analyse the function of pipes, pressure and safety accessories in relation to a medical gas system.
  • Define principles regarding installing a medical gas system.
  • Identify gas equipment and the function thereof.
  • Justify material compatibility according to gas type.
  • Define and analyse basic instrument control loops in terms of a medical gas system.
  • Identify pipelines and network systems and evaluate their functions in terms of a medical gas system.
  • Describe the function, application and safety requirement of engineering hand tools and power tools.
  • Evaluate important considerations in terms of the maintenance of a gas installation.
  • Define and describe basic welding principles, equipment and consumables.

    Associated Assessment Criteria for Exit Level Outcome 2:
  • Analyse a set of layout and/or mechanical drawings to determine the material and equipment.
  • Conduct a risk assessment of the installation which includes references to working at heights and confined spaces, pneumatic pressure testing, lockout procedures and permit to work.
  • Analyse the design, scope of work, site lay-out and isometric drawings of a medical gas system to determine a bill of materials based on specifications and site inspection to determine conditions.
  • Compile a correct bill of materials to execute the installation based on findings of the analysis, including safety-relevant documentation.

    Associated Assessment Criteria for Exit Level Outcome 3:
  • Assign permit to work before the commencement of work and lockout procedures are adhered to.
  • Position main equipment for medical gas systems according to the approved medical gas system design.
  • Interconnect and assemble gas installation components such as pipelines, pressure and safety accessories, to form a complete medical gas system.
  • Ensure that the installation of a medical gas system is legal and code compliant.
  • Conduct applicable pressure tests, leak tests, anti-confusion and particulate to prove the integrity of the medical gas system.
  • Complete the installation of a medical gas system according to good manufacturing practice (GMP) principles.

    Associated Assessment Criteria for Exit Level Outcome 4:
  • Conduct pre-commissioning checks of a medical gas system to ensure compliance with the design.
  • Carry-out purging and testing with nitrogen, medical air or the specific gas.
  • Use medical air for oxygen, oxygen and nitrogen oxide mixture and enriched air.
  • Introduce the applicable gas into the system to ensure the sufficient amount of gas is present for use.
  • Conduct a functionality test to confirm gas shut-off and functionality of all safety equipment.
  • Conduct start-up and performance checks confirming all safety measures are operational including shut-offs.
  • Issue a certificate of compliance (COC) for the medical gas system and hand-over documentation is prepared and finalised.

    Associated Assessment Criteria for Exit Level Outcome 5:
  • Apply fault finding sequence to detect defects and potential risks and to determine the root cause of failure of the medical gas system.
  • Compile a typical maintenance plan for the medical gas system which includes planned and statutory maintenance requirements to maintain operational safety and optimum performance and reliability.
  • Conduct de-commissioning and make safe procedures before maintenance of a medical gas system.
  • Conduct Statutory maintenance on a medical gas system according to legal requirements.
  • Re-commission gas into a medical gas system and the medical gas system is returned to normal operating conditions.

    Associated Assessment Criteria for Exit Level Outcome 6:
  • Define site safety concepts and analyse compliance in terms of a medical gas system.
  • Define and analyse occupational health, safety, risk and environment compliance.
  • Identify applicable gas regulations, legislation and standards and explain the application to gas installation.
  • Analyse quality and GMP principles in the gas industry.
  • Adhere to additional safety requirements which are product specific. 

    This qualification was compared with the Canadian Red Seal qualification "Gas Fitter - Class A" as well as the New Zealand Certificate in Gasfitting (Level 4).

    The Red Seal Gas Fitter "Class A" qualification, offered by Thompson Rivers University is an apprenticeship and is at Level 4. The duration is three years including a minimum of 4,500 hours of on-the-job training, three eight (8)-week blocks of technical training and a final certificate examination after which is being awarded a journeyperson certificate.

    Entry requirements entail a Grade 9 education or equivalent and passing an entrance examination, or having a gasfitter 2nd Class certification. The qualification includes the following aspects:
  • Common occupational skills which include safety-related functions, use and maintenance of tools and equipment and planning and preparing for installation, service and maintenance of installations.
  • Gas piping preparation and assembly which include tube and tubing, plastic piping and steel pipe for gas piping systems.
  • Venting and air supply systems which include the installation of venting, air supply systems and draft control systems.
  • Controls and electrical systems which include selection and installation of electronic and electrical components, automation and instrumentation control systems.
  • Installation of systems and equipment which include installation of gas-fired system piping and equipment, gas-fired system components and propane storage and handling systems.
  • Testing and commissioning of gas-fired systems.
  • Servicing gas-fired systems which include maintenance, repairing and decommissioning of gas-fired systems.
  • Essential skills include reading, document use, writing, numeracy, oral communication, thinking skills, working with others, computer use and continuous learning competencies.

    The Canadian qualification does not specify the various gas types per gas categories.

    New Zealand:
    The New Zealand Certificate in Gasfitting (Level 4) (2662) consists of 235 Credits, is offered by Unitec Institute of Technology. The qualification includes the following aspects:
  • Install, test, commission and maintain gasfitting systems in accordance with the legal requirements for a licensed gasfitter, including: Consumer gas pipework; Gas appliances; Gas equipment; Flueing and ventilation; and LPG installations for non-propulsive purposes in caravans and boats.
  • Interpret gasfitting drawings and specifications and produce drawings and records of as built work.
  • Understand and apply the legislative responsibilities of a licensed gasfitter.
  • Make, install and repair flashings and penetrations that are associated with gasfitting systems.
  • Work with consideration of other construction trades and related services on-site and practice ethically.
  • Apply material science and selection, trade physics, and environmentally sustainable considerations for gasfitting systems.
  • Apply safe working procedures and practices identify and control hazards in a working environment and isolate and test for safety and explain the limitations on gasfitters carrying out electrical work.

    The Occupational Certificate: Medical Gas System Installer compares well with the above qualifications in terms of content, knowledge and practical skills. However, the international qualifications do not specify the various contexts of operation, namely gas categories and gas types. 

    This qualification allows possibilities for both horizontal and vertical articulation.

    Horizontal Articulation:
  • Occupational Certificate: Pipe Fitter, NQF Level 4.

    Vertical Articulation:
  • Occupational Certificate: Draughtsperson (Piping Draught Person), NQF Level 5. 



    Qualifying for External Assessment:
    In order to qualify for an external assessment, learners must provide proof of completion of all required modules by means of statements of results and work experience records, including Foundation Learning Competence.

    Additional Legal or Physical Entry Requirements:
  • None

    Criteria for the Accreditation of Providers:
    Accreditation of providers will be done against the criteria as reflected in the relevant curriculum on the QCTO website.

    The curriculum title and code is: Medical Gas System Installer and 642603-000-00-04.

    Encompassed Trades:
    This qualification encompasses the following trades as recorded on the NLRD:
    This is not a trade qualification.

    Assessment Quality Partner:
    National Artisan Moderation Body. 


    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.

    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.