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               CODE OF CONDUCT AND


This document contains a code of conduct and provides guidelines for ‘Type B approving
authorities’ for making approvals of Type B gas devices. A ‘Type B approving authority’ is a
person or body who has an approval from the Chief Inspector to approve the offer for sale,
installation or use of a gas device (Type B) under s733 of the Petroleum and Gas
(Production and Safety) Act 2004. Compliance with this code of conduct and guideline
forms a condition of the approval by the Chief Inspector of an approving authority.

Under s733 (2), a Type B approving authority approves that the design of a Type B gas
appliance, whether new, relocated or modified after installation, complies with statutory
requirements. This is required before the device can be sold, used or installed.

Reference should also be made to ‘Guidelines for Type B Approval Process’ and
‘Guidelines to the approval process for Type B approving authorities’.

Code of Conduct
Duty of care and conflict of interest

1. Type B approving authorities must comply with the conditions of their appointment as
   detailed in the application form and any letter of appointment.

2. All Type B approving authorities are expected to meet the common law “duty of care” as
   well as requirements under the Petroleum and Gas (Production and Safety) Act 2004
   and Regulation 2004, including relevant safety requirements and standards.

3. When making decisions or undertaking reviews, approving authorities are encouraged
   to seek advice where necessary from the Chief Inspector, Petroleum and Gas or their
   peers (other Type B approving authorities) and relevant Standards committees to raise
   issues or matters to provide for a more effective review and assessment and approval

4. Approving authorities shall be fair and always act in a nondiscriminatory way. Conflicts
   of interest (or possibly perceived conflicts of interest) must be carefully avoided.
   Similarly, the acceptance of gifts or favours that may be seen to compromise the
   independence of the Type B approving authority’s decision-making must be avoided.

5. Ideally approving authorities should not be providers of installation services for Type B
   gas devices. Where they are, unless they are authorised to do so by the Chief
   Inspector, (i.e. certain Approving Authorities approving Class S devices and under
   certain conditions Class C devices), a Type B approving authority must not approve any
   Type B appliance with which he or she (or their employer) has been associated in any
   way (including appliance supply, appliance design work or design modifications) or will
   be associated with (installation).

6. When approached for approval services, a Type B approving authority shall declare, to
   the person or organisation making the approach, his or her ability (and authorisation) to
   do the work, or not to do the work.

               Type B Approving Authority Code of Conduct and Type B Approval Guideline
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2, 17 December 2009

7. Approving authorities must report to the Chief Inspector any breach or potential breach
   of the safety requirements they identify or become aware of in the course of undertaking
   their review or making an approval under s733. Also if a decision not to make an
   approval is made, the Chief Inspector should be notified in writing.

8. They must also report if installation work is not being undertaken by an appropriately
   qualified person eg a gas work license holder doing Type B work.

9. A Type B approving authority shall treat as confidential all information provided to
   him/her for the purpose of carrying out the approval work. An approving authority
   approving Class C devices and whose organisation also undertakes installation work
   must keep all confidential design material provided to the approving authority at arms
   length from the installation business unit.

Guidelines for Type B approving authorities making approvals under
Approval process and documentation

1. Approvals are made on the basis of a submission from the gas appliance manufacturer/
   supplier or in the case of some devices the operators/future owner of the device or the
   proposed gas installer. The submission should meet the requirements of AS3814.

2. The submission should be assessed in accordance with technical requirements below.

3. At the conclusion of the review, if satisfied that the appliance meets the technical and
   safety standards required by the legislation, the Type B approving authority will
   complete a ‘Type B gas device approval certificate’ (Form PGA733(2)AA) and approve
   the device for installation and commissioning as required under s733.

4. Where appropriate prior approval for commissioning gas can be provided separately
   either by a separate approval certificate (clearly worded) or by letter. This approval
   must state a period during which commissioning gas can be provided. Further
   extension can be sought from the approving authority if required. Request for abnormal
   periods of commissioning gas should be directed to the Chief Inspector.

5. The Type B Gas Device Approval Certificate books can be purchased from the office of
   the Chief Inspector – contact Debbie Kilgour at or
   telephone 3239 6888.

6. The approval would normally be supported by necessary information in a letter or
   report. Where required (such as for a Class C4 or M device) the approving authority will
   normally undertake a further inspection before commissioning can commence.

7. The approving authority must place a compliance plate on the device signifying the
   device meets the relevant safety requirements.

8. The original Type B Gas Device Approval Certificate must be provided to the owner,
   one copy to the office of the Chief Inspector, Petroleum and Gas and one retained by
   the approving authority.

9. A Type B approving authority shall retain for a period of not less than five years
   sufficient documentation of all approvals for audit purposes. When requested, this
   documentation shall be made available for auditing by the Chief Inspector.

               Type B Approving Authority Code of Conduct and Approval Guidelines
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2 17 December 2009

10. If there is any change in employment status and/or they are no longer active in an
    approval role, Type B approving authorities must notify the Chief Inspector in writing.
    The Certificate of Appointment and unused Type B Gas Device Approval Certificates
    must be returned together with the written notification.

Technical requirements
The role of the Type B approving authority is to approve (for the installer and owner/
operator of the type B installation/equipment) that the design of a Type B gas device(s)
(either new or modified) complies with statutory requirements. Statutory requirements
include the requirements of the Petroleum and Gas (Production and Safety) Act 2004, the
Petroleum and Gas (Production and Safety) Regulation 2004 and the relevant standards
referred to in the Regulation, which include (but are not restricted to):
   •   AS 3814 ‘Industrial and commercial gas-fired appliances’ (2005). AS3814:2009 is
       not currently law in Queensland. It is proposed to apply this new standard in early
       2010, once its application has been assessed.
   •   AS/IEC 61511 ‘Functional safety—safety instrumented systems for the process
       industry sector’ Part 1 ‘Framework, definitions, systems, hardware and software
       requirements’ (2004) Part 2 ‘Guidelines for the application of AS/IEC 61511—1’
       (2004) Part 3 ‘Guidance for the determination of the required safety integrity levels’
   •   AS61508 ‘Functional safety of electrical / electronic / programmable electronic
       safety-related systems’

In general terms, this means the Type B approving authority will carry out the following:

1. Examination of the engineering design details contained in a technical submission
   prepared by the appliance supplier (or, in the case of an existing older appliance, the
   owner/operator – an authorised gas installer) such as the gas train, burner management
   system, safety controls etc for each Type B appliance planned for the installation,
   resulting in a written “approval for installation” by the Type B approving authority for
   each appliance installation. This approval gives authority to install and commission the

2. The content of the technical submission should follow the requirements of Appendix A
   of AS3814: 2005 (and should be provided to the approving authority at least 28 days
   prior to the device being commissioned). The submission should contain the following
   necessary information to analyse the burner management system:
   •   valve train schematic including gas pressure settings;
   •   specification of components e.g. AGA or other certifier details, pressure ratings etc;
   •   purge, start gas and critical energy calculations;
   •   electrical schematic of the burner management system; and
   •   detailed description of the working of the burner management system or a logic
       diagram. Both should highlight the essential responses of the system e.g. lockout,
       shutdown, alarm.

3. Australian Standard AS 3814:2005 is the primary code to be used as the basis for the
   review. If other codes or standards are used the submission needs to contain
   justification for their use in the form of a risk assessment that shows that risk is at the
   same or lower level than if AS 3814 had been used. In addition, as AS5601 Gas
   Installations, is referenced in AS3814 with respect to gas piping and components,
   compliance with AS5601 shall also be checked with respect to requirements for gas
   piping, identification, painting, components, hoses, etc.
               Type B Approving Authority Code of Conduct and Approval Guidelines
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2 17 December 2009

4. Generally, all systems which perform safety-related functions shall be hard-wired and,
   to gain acceptance for programmable electronic systems (PES) on a Type B appliance,
   will require the applicant (the supplier of the appliance) to submit the following:
   •   a relevant flow chart containing a description of events to occur within the PES;
   •   relevant parts (only) of the PES program;
   •   hard-wired electrical circuit diagram in ladder logic format clearly indicating
       connections to the PES; and
   •   a Safety Integrity Level (SIL) determination for the PES system made with respect to

5. Where a PES is used to control safety-related functions, the Type B approving authority
   shall ensure:
   •   the controller is a safety-related PES with an appropriate SIL;
   •   the controller possesses a TUV safety certificate to the appropriate SIL as per
       IEC/AS 61508 or DINV19250 or some equivalent certificate and any restrictions as
       outlined in the conditions of the certificate; and
   •   only TUV approved ‘firmware’ (or equivalent) is to be used in the controller.

6. To ensure the integrity of the PES user software, the Type B approving authority must
   make certain that the person (or company) that designed the system has quality
   assurance accreditation and has adhered to the principles outlined in AS 61508 –
   Functional safety of electrical/electronic/programmable electronic safety related

7. The Type B approving authority shall ensure that he or she receives certification in
   accordance with Appendix I of AS 3814: 2005. This certificate is required for PES and
   is usually issued at the end of commissioning.

8. Where applicable, the Type B approving authority shall check purge time calculations,
   start gas rate and energy calculations for compliance with requirements of Australian
   Standards AS 3814 and AS 1375 Industrial fuel-fired appliances.

9. The start-up, time limits, operating sequence and designed interlocks should be
   checked for compliance with AS 3814:2005.

10. For spray booths approving authorities must ensure the booth complies with AS4114:
    Spray painting booths, designated spray painting areas and paint mixing rooms Part 1:
    Design, construction and testing and Part 2 Installation and maintenance. In particular
    the hazardous zone requirements in relation to motors in duct work must be compliant.

               Type B Approving Authority Code of Conduct and Approval Guidelines
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2 17 December 2009

Approval of “mass produced” Type B Devices

The Gas Technical Regulators Committee (GTRC) is currently considering proposals to
allow Type A certification bodies to approve certain types of mass produced “plug in” Type
B devices. This could include:
•   Commercial type heaters/dryers and other appliances that would, if not for their gas
    consumption rate, fall under an existing appliance standard
•   Gas engine driven electrical generators (small);
•   Gas engine driven air conditioning units (small)’
•   Gas driven compressors/stationary engines (small)’
•   Micro gas turbine driven electrical generators (small); and
•   Pottery/ceramic kilns.

It is hoped that changes to the Petroleum and Gas (Production and Safety) Act 2004 will be
in place 1st quarter 2010 to allow this process.

Currently approval of these types of device which fall outside of the definition of Type A
devices and under the definition of Type B, must be undertaken by a Type B approving
authority. This should be undertaken in accordance with the application of any relevant
standards or consideration of standards. This could include relevant overseas standards
where these are mapped to relevant Australian standards.

Where applicable, the principles of the safety requirements (Schedule 6 of the P&G
Regulation) should be applied.

For larger “mass produced” devices such as gas compressors and engines used in the
upstream petroleum area Type B approving authorities may undertake the one approval of
identical mass produced devices on the one certification approval certificate. The
submission (and the certificate) must identify the serial numbers of all the devices built to
that specification. The units must be identical and a maximum of 20 can be made under
the one approval. Any changes to the design specification (including engines of larger
capacity) will require separate approval.

When is approval required?


AS3814:2005 s1.2.5 Modification or relocation of an appliance’ states that “Where an
appliance is modified or relocated, it shall be upgraded to meet the requirements of this
Standard current at the time of the modification or relocation and be re-submitted to the
technical regulator for approval, unless the technical regulator advises to the contrary.”

AS3814:2005 then states that a modification is “An upgrade to any or all of: gas valve train
equipment; combustion/purge air system; flame safeguard system; burner management
system (not involving like for like exchange of components) that changes the safety integrity
of the existing system or takes the gas appliance out of its original certification criteria.

               Type B Approving Authority Code of Conduct and Approval Guidelines
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2 17 December 2009

Like-for-like replacement of parts or equipment does not fall under the definition of
modification. That is if a part is replaced by exactly the same part , it is not a modification
and there is no need for additional approval/action. However if the part is not exactly the
same the key questions to consider are:
   o   Does the replacement change the safety integrity of the current system?
   o   Does the change take the gas appliance out of its original certification criteria?

The following process is proposed where the answer to either question above could be yes:
   1. Scope of the modification should be defined
   2. The effect of the modification on the operation and safety of the appliance should be
      documented (this may involve a risk assessment or a mapping of applicable
      specifications or standards. For operating plant a change management process
      should be followed).
   3. A test plan for the commissioning/testing of the modification must be developed.
   4. All of the above should be completed by the relevant appliance owner/operator or
      their contracted authorisation holder.
   5. The above documentation is then submitted to a Type B Approving Authority for
   6. If acceptable, the Approving Authority will issue a preliminary approval (in the form
      of a letter).
   7. The modification can then be implemented by the Gas Work Authorisation holder or
      operator of an operating plant. Note such a modification does not need a major
      project authorisation even if it is at an operating plant where the combined rating of
      the gas devices is more than 50GJ/hr.
   8. The modification must be thoroughly tested to ensure it operates as required (trip
      testing, etc)
   9. Upon receipt of all testing documentation, the Approving Authority will issue a formal
      Type B Gas Device Approval Certificate.

A major modification that clearly impacts on the safety integrity of the current system or
takes the gas appliance out of its original certification criteria will have to undergo the
normal submission and approval process.

Relocation of devices

Relocation is not defined in AS3814 but is taken to mean relocation from the current
location to any other location, including on the same premises. Therefore if a device is
relocated it will need to be resubmitted for approval. However, if the device has been
approved under s733 of the P&G Act (ie approval was made from 1 January 2005), the
environmental conditions are the same (eg ventilation) and the device has been maintained
and serviced appropriately (AS3814: 2009 Appendix G provides a guide) then re-approval is
not required when relocating a device. Of course if the device is dismantled, altered or
modified as part of the relocation then the requirements for approval outlined above would

 - Reconnection of simple ’plug in‘ appliances such as small kilns would not need
 - Moving a gas fired boiler and associated gas train and controls to another building
    would need reapproval.

               Type B Approving Authority Code of Conduct and Approval Guidelines
    Petroleum and Gas Inspectorate, Department of Employment, Economic Development and Innovation
                                     Version 2 17 December 2009

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