6 June Document Status REVISION STATUS DATE. Initial release to industry. This Revision expired on 16 Sep

Transcription

1 6 June 2014 Document Status REVISION STATUS DATE REV 0 Initial release to industry. This Revision expired on 16 Sep Sep 2013 REV 1 Draft submission to ESDD 16 Sep 2013 REV 2 Draft resubmission to ESDD 29 Jan 2014 REV 3 Draft resubmission to ESDD 5 Mar 2014 REV A Draft resubmission to ESDD 17 Mar 2014 REV B Draft resubmission to ESDD 14 Apr 2014 REV C For ESDD final approval for public release 16 Apr 2014 REV D Approved by ESDD 6 June 2014

2 Table of Contents Scope Gas Network boundary What the GS&I Rules cover What the GS&I Rules do not cover Definitions Disclaimer Contact Scope Responsibilities of an ActewAGL authorised person Meter Upgrades and Maintenance Delivery Pressure Gas Connection labeling ActewAGL s Authority under the Act regarding customer connections Securing the gas connection Infrastructure location By-pass Number of gas connections provided to a customer ActewAGL approval to connect to existing gas infrastructure Locations for gas meter set installations Domestic Meters New industrial, commercial gas meter sets and high rise residential installations Prohibited meter set locations Metering Equipment Enclosure Design Type 1 enclosure Type 2 enclosure Appendix A: Scope of Gas Work Appendix B - Domestic Gas Meter Location Reference Drawings Appendix D- Scope of AS/NZS in Natural Gas Supply Chain Appendix E Signage Type 1 Enclosures: Flammable Gas Zone 2 Hazardous Area Type 2 Enclosures: Natural Ventilation Zone 1 Hazardous Area Type 2 Enclosures: Mechanical Ventilation ActewAGL GS&I Rules REV D Page 2 of 34

3 These GS&I Rules are divided into three parts: 1. PRELIMINARY 2. ActewAGL OBLIGATIONS 3. CUSTOMER OBLIGATIONS ActewAGL GS&I Rules REV D Page 3 of 34

4 1 PRELIMINARY 1.1 Scope These GS&I Rules are issued by ActewAGL under the requirements of the Gas Service and Installation Rules Code, which was created on the 2-July 2013, under the Utilities Act (ACT) 2000 (the Act). Section 25 (2) (a) (iv) of the Act requires a licensed utility to comply with technical codes and standards. Applicable standards for the installation of gas metering equipment include: AS/NZS 4645 AS/NZS 5601 AS/NZS as published from time to time. These GS&I Rules apply from the date of approval (as shown on front page of these GS&I Rules). 1.2 Gas network boundary The boundary between a Gas Distribution Network and a customer s premises is at the point of supply. The Gas Network Boundary Code (2013) removed the option of the network boundary being at a different location to the point of supply from 28th May 2013 and the network boundary is at the point of supply. For existing gas meter set installations inside the customer s building: 1) only a gas meter can be replaced in the existing location; 2) any alteration to the configuration of existing gas meter set installation, other than the gas meter, will require the relocation of the gas meter set installation to an external location in accordance with Clause 6.7 (1); and 3) No new gas meter set equipment shall be installed into an existing internal gas meter set installation. 1.3 What the GS&I Rules cover These GS&I Rules set out the requirements for the safe, reliable and efficient connection, by all persons, of a gas connection service from a gas distribution pipeline to a customer s premise. 1.4 What the GS&I Rules do not cover All work associated with the consumer piping downstream of the point of supply. This is governed by legislation, codes or standards. The requirements for this work can be found in the Gas Safety Act 2000 (ACT) and AS/NZS Gas Installations. The following items are performed by ActewAGL on its gas infrastructure in accordance with its specifications and are not within the scope of these GS&I Rules: (1) Installation or modification of distribution pipelines (2) Installation or adjustment of regulator sets (3) Hot water meters for the purposes of water metering. ActewAGL GS&I Rules REV D Page 4 of 34

5 1.5 Definitions The following definitions apply within this document: the Act ActewAGL AS/NZS breather vent builder BCA consumer piping The Utilities Act 2000 (ACT) ActewAGL Distribution (ABN ), being the gas distributor in the Australian Capital Territory. For the purpose of these GS&I Rules, this definition includes ActewAGL s approved representative: Jemena Asset Management Pty Ltd (ABN ). When followed by numbers or letters AS/NZS means a standard published by Standards Australia as current at the time, e.g. AS/NZS Gas Distribution Networks. A breather vent as defined in AS/NZS 4645 (which calls up AS/NZS Gas Installations) A person who provides, has provided or intends to provide (is responsible for) the erection, alteration or demolition of a building. Building Code of Australia consumer piping is as defined within AS/NZS Gas Installations customer a person to whom the service is provided under a customer contract; or a person who has applied, orally or in writing, to the relevant utility for the service to be provided under a customer contract. customer contract a standard customer contract, made under the Act; a negotiated customer contract, made under the Act; or a customer connection contract, made under the National Energy Retail Law. distribution pipeline enclosure gas connection Pipes used in the gas distributor s gas reticulation network to transport gas Any cage/structure/room where meter sets/regulator sets are housed gas connection means a physical link between a distribution pipeline and a point of supply to allow the flow of natural gas. gas distributor a utility licensed for the distribution of gas through a gas network; or in relation to a gas connection service for premises a utility licensed to provide the service for the premises. ActewAGL is the gas distributor in the Australian Capital Territory. ActewAGL GS&I Rules REV D Page 5 of 34

6 gas retailer An entity whose primary activity is the sale of gas to customers. Gas Service and Installation Rules Code GS&I Rules gas work gasfitter gasfitting work The Gas Service and Installation Rules Code, which was created on the 2-July 2013, under the Act. The Gas Service and Installation Rules issued by ActewAGL under the requirements of the Gas Service and Installation Rules Code. Work on ActewAGL s gas infrastructure An entity that may be licensed to do gasfitting work under the Gas Safety Act 2000 (ACT), i.e., Licensed gasfitter and an Advanced Licensed gasfitter. Work as defined in the Gas Safety Act 2000 (ACT) as follows: Work on consumer piping, or proposed consumer piping, including the connection or disconnection of a gas appliance (other than a gas appliance designed to be portable by users) to or from the consumer piping; or the inspection or testing of consumer piping; and The installation, the connection or reconnection of the consumer piping to the point of supply. hazardous area In accordance with AS/NZS a hazardous area is defined as an area in which an explosive gas atmosphere is present, or may be expected to be present, in quantities such as to require special precautions in the design, construction, installation and use of apparatus. infrastructure infrastructure as defined in the Utilities Act 2000 (ACT) (the Act) means pipelines, meters, or any equipment (including pressure control devices, excess flow valves, control valves, actuators, electrical equipment, telemetry equipment, cathodic protection installations, compounds, pits, buildings, signs and fences). This excludes pipework downstream of an agreed network boundary, agreed to prior to the 28th May 2013, in accordance with the regulations applying at the time of agreement. kpag legislation MAOP kilopascals (gauge pressure) The Acts, Regulations and all subordinate legislative instruments pertaining to gas safety in the Australian Capital Territory as in force from time to time. Maximum Allowable Operating Pressure ActewAGL GS&I Rules REV D Page 6 of 34

7 meter control valve meter meter set metering equipment A manually operated ball valve which is located on the end of a service riser and which allows gas supply to a meter set/regulator set to be shut off. A device or other apparatus used for measuring and recording the consumption of gas. meter set means a gas meter, and other ancillary equipment used for measuring and regulating the gas pressure; or installed metering equipment that may be kit-based or prefabricated. Kit-based sets are installed on a meter bar whereas prefabricated sets are mounted on an independent support frame. metering equipment means equipment necessary for measuring and recording the consumption of gas. Metering equipment encompassed in a meter set may include: meter a device or other apparatus used for measuring and recording the consumption of gas valves to isolate gas supply pipework including a combination of pipes, flanges, tees, elbows and other pipe connecting equipment designed to convey gas fittings including a combination of smaller instruments and pressure sensing tubing and tube fittings, instrument valves and associated equipment filters devices designed to trap and remove foreign matter from gas streams regulators to reduce and control gas pressure over-pressure protection devices to protect downstream equipment from exposure to excessive pressure (overpressure) in the event of upstream equipment failure non-return valves to ensure gas flow travels in one direction and to prevent reverse flow mechanical indexes to indicate raw metered gas consumption meter bar/support equipment designed to support the meter and associated equipment, electrical connections and wiring to convey electrical signals for meters, flow correctors, alarms and metering communications equipment flow correction devices or software to enable (actual) uncorrected metering data to be adjusted for effects of temperature and/or pressure and/or gas quality and referenced to standard pressure and temperature conditions temperature and pressure correction devices or software to enable raw (actual) uncorrected metering data to be adjusted for effects of temperature and pressure heating value analysis equipment and devices to analyse and calculate the heating value of the gas stream such as gas chromatographs or calorimeters. ActewAGL GS&I Rules REV D Page 7 of 34

8 network boundary person point of supply property boundary path valve regulator set The boundary between a gas distribution network and a customer s premises is at the point of supply, unless prior to 28 May 2013, an alternative boundary has been agreed to in accordance with the regulations applicable at the time of installation. Person includes a natural person, a firm, an unincorporated association or a body corporate; point of supply means the outlet of the meter set. The front boundary of the boundaries of a block as defined in the deposited plan lodged with the Australian Capital Territory Registrar- General s office. This is usually the property line which divides the customer s private property from public areas, such as streets, roads and lanes. A valve situated approximately 225 mm outside the property boundary at the inlet of the gas connection. It is usually below ground in a path box for easy access, and is used to isolate the flow of gas into the gas connection. Installed metering equipment, as defined under meter set but does not include a meter. secondary regulator set A regulator set supplied from ActewAGL s secondary distribution network (MAOP 1050 kpag) secondary gas connection A gas connection supplied from ActewAGL s secondary distribution network (MAOP 1050 kpag) secondary meter set A meter set supplied from ActewAGL s secondary distribution network (MAOP 1050 kpag) service riser A vertical section of the gas connection which protrudes from the floor of an enclosure or the ground technical inspector Technical Regulator A technical inspector is appointed under section 67 of the Utilities Act 2000 (ACT) and applies the requirements of technical codes. The Director-General of the Environment and Sustainable Development Directorate (ESDD) or a delegated officer Type 1 enclosure External enclosure positioned outside the confines of a building. The enclosure is typically constructed of wire fencing, brick or concrete and is not covered by a solid roof ActewAGL GS&I Rules REV D Page 8 of 34

9 Type 2 enclosure Internal enclosure inside a building. The enclosure must be externally accessible with no access to the remainder of the building, and be covered by a solid roof. utility service the transmission of gas through a gas transmission network; or the distribution of gas through a gas distribution network; or a gas connection service. vented vent line ventilation The action achieved by a vent line. A pipe connected to a pressure regulator breather vent, or relief valve discharge, which conveys gas to a safe location. The process of an air change. In the case of metering equipment in an enclosure, this corresponds to a flow of air displacing the potential concentration build-up of gas. 1.6 Disclaimer These GS&I Rules apply to ActewAGL s infrastructure. ActewAGL accepts no responsibility for any other use of these GS&I Rules. 1.7 Contact Gas Customer Services can be accessed by ringing There are then the following options: 1 For gas emergencies 2 Billing or account enquiries 3 Assistance in identifying Network components or DBYD enquiries 4 Move Network components including meters 5 New Connections 6 Licensed plumbers requiring technical advice 7 Other Customer service. W eb: Web: ActewAGL GS&I Rules REV D Page 9 of 34

10 2 ActewAGL OBLIGATIONS 2.1 Scope This Section outlines the obligations of ActewAGL for connection of customers to ActewAGL s infrastructure in accordance with the scope specified in Section 1.1 of these GS&I Rules. For works performed on ActewAGL s gas infrastructure: (1) ActewAGL is responsible and liable under the Act for the outsourcing of works to third parties regarding construction and maintenance of gas connection services and gas connection equipment. (2) Any authorised persons engaged to perform works on ActewAGL s gas network must be trained and/or deemed competent by ActewAGL to conduct the works. ActewAGL will maintain a list of authorised persons. (3) The competencies of these authorised persons must be documented by ActewAGL, be current and be available for inspection by a technical inspector under section 67 of the Act. (4) ActewAGL must take immediate action to rectify gas connection work, at no cost to the customer or third party, if ActewAGL is in breach of its GS&I Rules, industry and technical codes or the relevant Australian Standards at the time of installation, and a customer or third party suffers or may potentially suffer a loss. 2.2 Responsibilities of an ActewAGL authorised person ActewAGL are responsible and liable under the Act for all work performed on the gas network. ActewAGL may authorise/approve a person to perform work on their infrastructure. ActewAGL must ensure the authorised person meets the following requirements: (1) Supply sufficient information to ActewAGL so that ActewAGL can authorise the work, and provide suitable equipment; (2) obtain authorisation for any gas work; (3) once authorisation is obtained, performing and / or supervise the gas work; (4) ensuring all gas work, notifications and certificates are performed in accordance with the Utilities Act 2000 and its Regulation; (5) confirm with ActewAGL that a gas distribution pipeline is available with adequate gas supply and pressure before starting work; (6) planning and performing the gas work; (7) perform the gas work to an acceptable level of competency and to the satisfaction of ActewAGL; (8) correct all defects promptly when advised by ActewAGL; (9) take corrective action where an installation has been found to be unsafe and ensuring the customer and ActewAGL are advised immediately of the defect and the corrective action taken; ActewAGL GS&I Rules REV D Page 10 of 34

11 (10) manage direct or indirect claims arising from damages to persons or property through work performed by the authorised person, under the person s supervision and/or by the person s employee s; (11) ensure that a gas connection is designed and installed so that all gas conveyed through the installation is measured through the gas distributor s meter; (12) An authorised person may decline to perform gas connection work on behalf of ActewAGL should they believe that the instructions and/or materials supplied by ActewAGL are insufficient to successfully complete the gas connection works or should they believe the work is beyond their level of training or competency s. 2.3 Meter Upgrades and Maintenance For existing gas meter set installations inside the customer s building (1) only a gas meter can be replaced in the current locations; and (2) any alteration to the configuration of existing gas meter set installations, other than the gas meter, will require the relocation of the gas meter set installations to an external location as in section 3.3; and (3) No new gas meter set equipment shall be installed into an existing internal gas meter set installations. Note: The replacement meter must be the same as the installed meter in design specifications. 2.4 Delivery Pressure Depending upon connected gas load (appliances) and available supply pressure, meter sets are issued with the following delivery pressures: (1) 2.75 kpag +/ kpa (2) 5 kpag +/- 0.2 kpa (3) 35 kpag +/- 1 kpa. Regulator sets are issued with the following delivery pressure: (1) 5 kpag +/- 0.2 kpa. Other regulator set settings may be chosen by ActewAGL in specific cases. During installation of a meter set or regulator set the delivery pressure into the customer piping must be confirmed. 2.5 Gas Connection labeling If the premises have sub-tenancies with separate gas connections given to separate customers, ActewAGL will be required to mark and identify each gas connection. The identification shall be placed on the gas connection equipment. ActewAGL GS&I Rules REV D Page 11 of 34

12 3 CUSTOMER OBLIGATIONS This Section outlines the obligations of customers for connection to ActewAGL s gas infrastructure in accordance with the scope specified in Section 1.1 of these GS&I Rules. 3.1 ActewAGL s Authority under the Act regarding customer connections (1) ActewAGL may refuse gas supply or resupply to a customer or may disconnect the gas supply to the gas connection where compliance to the gas distributor s GS&I Rules has not been met. (2) ActewAGL may refuse to provide gas supply to a customer where the customer piping installation has not been certified in accordance with the Gas Safety Act 2000 (ACT). (3) Under these GS&I Rules, the customer is prohibited from upgrading, modifying or relocating ActewAGL s infrastructure up to the point of supply. Such gas work must be performed by ActewAGL, or their approved person authorised in accordance with ActewAGL s specifications in Section 2.2. However, all gas works performed by persons on the gas connection service, from the existing gas distribution pipeline to the outlet of the meter set, must have prior approval by ActewAGL and must be deemed as acceptable by ActewAGL upon completion. (4) All meter sets/regulator sets have their outlet pressure adjustments sealed to prevent unauthorised adjustment. The regulator set and settings must not be altered without prior approval from ActewAGL. 3.2 Securing the gas connection Infrastructure location The customer may be required to provide and maintain, on the customer s premises and at the customer s expense, a location within the customer s premises to accommodate gas connection equipment for the benefit of gas supply. The customer may be required to take the necessary measures for accommodating the gas distributor's infrastructure if the gas distributor considers it necessary: By-pass (1) To prevent obstruction or diversion of the gas supply; (2) To avoid interference with the gas supply to other customers; (3) To secure the metering equipment for the purposes of gas supply. If an uninterrupted supply of gas is essential for customer operation, the gas retailer must be notified at the time of requesting gas supply to enable ActewAGL to determine the suitability of a meter set fitted with a permanent by-pass. Bypasses are usually installed for special requirements such as continuously operated industrial or commercial processes, essential services, and public and large private hospitals. By-pass valves are sealed in the closed position and must not be operated. ActewAGL authorisation must be obtained to operate an unmetered by-pass on a meter set. ActewAGL GS&I Rules REV D Page 12 of 34

13 3.2.3 Number of gas connections provided to a customer ActewAGL may limit the number of gas connection services to one gas connection for one building, or one group of buildings on the same parcel of land. ActewAGL may consider it necessary to provide more than one gas connection service to a large parcel of land with multiple connections, or where ActewAGL agrees to a customer s request to provide an additional gas connection to the customer s premises ActewAGL approval to connect to existing gas infrastructure ActewAGL approval shall be obtained for connection to its existing gas infrastructure. ActewAGL s approval or disapproval will be in respect to ensuring minimum gas supply to original or existing gas customers supplied from a gas connection. 3.3 Locations for gas meter set installations Domestic Meters Domestic gas meters shall be installed externally and in accordance with the approved locations identified in Appendix B - Domestic Gas Meter Location Reference Drawings so that meters are safely accessible for maintenance and reading New industrial, commercial gas meter sets and high rise residential installations (1) ActewAGL s gas meter set installations, which were installed after the Gas Service & Installation Rules Code was introduced, must be placed external to a customer s building; and (2) An enclosure to house the gas meter set may be secured into the face of the customer s building; and (3) The enclosure must meet the relevant Australian Standards and only be accessed via the external face of the customer s building Prohibited meter set locations In accordance to AS/NZS but subject to additional requirements of Section 3.4 of these GS&I Rules, meter sets/ regulator sets must not be installed in the following locations: (1) a lift shaft or lift motor room; or (2) a room specifically intended for electrical switchgear; or (3) a fire-isolated stairway or passage; or (4) a fire hydrant duct or hose reel cabinet; or (5) a sprinkler or hydrant pump room; or (6) near a source of ignition; or (7) in a position that would obstruct egress from a building. (8) In a position where the meter set would be subject to physical damage unless adequately protected. Specifically, physical protection for the ActewAGL GS&I Rules REV D Page 13 of 34

14 metering equipment (including meters, regulators, filters, valves, meter bars, exposed inlet piping and vent line) must be installed where the meter set location is within one (1) metre of roads, driveways, car parking areas, garages, loading docks etc., or other areas where there is mobile plant, equipment or vehicles moving within one (1) metre of the meter location. (9) In an area where excessive temperatures or sudden excessive changes in temperature may occur. (10) In an area of excessive vibration. (11) In the foundation area under a building. (12) In a cavity wall, unless installed in a ventilated enclosure with external access and the cavity is sealed (see Figure 1(e) & Figure 1(f)). (13) In a position where access for meter reading or maintenance is restricted. (14) In an unventilated position. (15) On the ground, or on a floor which is frequently wetted, or on a floor which contains material which may corrode the meter. (16) Where a service riser is not separated from an earth electrode by 500 mm. 3.4 Metering Equipment Enclosure Design This section details the requirements for the design of any enclosure intended to house metering equipment. When directed by ActewAGL, enclosures must be installed to prevent unauthorised access or damage to meter sets/regulator sets. Two enclosure types are listed below in order of preference for industrial and commercial installations. The building owner or representative shall provide justification to ActewAGL at the building design stage for requesting an enclosure. (1) Type 1 enclosure - external enclosure positioned outside the confines of a building. The enclosure is typically constructed of wire fencing, brick or concrete and is not covered by a solid roof. (2) Type 2 enclosure - internal enclosure inside a building. The room must be externally accessible with no access to the remainder of the building, and be covered by a solid roof. Schematic drawings of such enclosures are shown in Figure 1(c) to Figure 1(g). No other equipment (e.g. water meters, pumps, compressors, fire hydrants) can be placed within an enclosure unless authorised to do so in writing from ActewAGL. ActewAGL GS&I Rules REV D Page 14 of 34

15 3.4.1 Type 1 enclosure External Type 1 enclosures must comply with the following requirements, as indicated in Figure 1(a) to Figure 1(d): (1) The location of the Type 1 enclosure must be approved by ActewAGL at the site design stage. (2) Type 1 enclosure dimensions must be as indicated in the Figures, or on ActewAGL supplied meter set/ regulator set site layout drawings, whichever is the greater. (3) Type 1 enclosure clearance dimensions from piping must be as indicated in the Figures or ActewAGL-supplied meter set/regulator set site layout drawings, whichever is the greater. (4) The Type 1 enclosure must have two entry points located at different sides of the enclosure as demonstrated in the Figures. (5) The Type 1 enclosure must (or as otherwise approved by ActewAGL) be fitted with signage as in Appendix E - Signage. The design must comply with AS/NZS (6) The Type 1 enclosure floor must be constructed of concrete and be level, as demonstrated in the Figures. (7) Appropriate permanent safety barriers (e.g. Armco railing) must be installed between a Type 1 enclosure adjacent to a vehicular traffic path (see Figure 2 - examples of appropriate permanent safety barriers). (8) The design and construction of the Type 1 enclosure must not restrict natural ventilation such that any gas can freely escape. (9) The Type 1 enclosure must be fitted with an ActewAGL supplied gas distribution padlock. ActewAGL GS&I Rules REV D Page 15 of 34

16 3.4.2 Type 2 enclosure Type 2 enclosures must comply with the following requirements as indicated in Figures 1(e) to 1(g): (1) The location of the Type 2 enclosure must be approved by ActewAGL at the building/site design stage. (2) The Type 2 enclosure must be situated by the external wall of a building closest to where the gas connection enters the building, unless specifically approved by ActewAGL. (3) The Type 2 enclosure to house the meter set/regulator set may be secured into the face of the customer s building. (4) The Type 2 enclosure must meet the relevant Australian Standards and only be accessed via the external face of the customer s building. (5) The Type 2 enclosure may be fitted with a single entry door where maintenance activities can be undertaken on metering equipment without the metering equipment impeding access to the Type 2 enclosure entry door. Examples of such Type 2 enclosures are shown in the Figures. This requirement may be varied subject to specific approval from ActewAGL. (6) The Type 2 enclosure must have adequate clearance for maintenance work to be performed. Clearance dimensions in the Figures should be used. This requirement may be varied subject to specific approval from ActewAGL. (7) The Type 2 enclosure floor must be constructed of concrete and be level. (8) The Type 2 enclosure door(s) must (or as otherwise approved by ActewAGL) be fitted with signage as in Appendix E - Signage as classified in the Figures. The design must comply with AS/NZS (9) The Type 2 enclosure walls and door(s) must have the appropriate Building Code Australia (BCA) fire rating. (10) The meter set/regulator set must not be installed in a Type 2 enclosure containing an unsealed grease trap. (11) All meter set/regulator set breathers/relief vents must be vented outside the Type 2 enclosure according to the requirements in AS/NZS This may require penetrations through the external face of the customer s building for vent line installation. (12) Regulator breather/relief vent line terminal points should be positioned such that gas discharge can be detected. The vent line terminal points must be protected from rainwater and vermin ingress. (13) The Type 2 enclosure s ventilation must comply with AS/NZS (14) Natural ventilation construction must not be of a type that restricts the flow of natural gas to the outside of the Type 2 enclosure. The design must take into account that natural gas is lighter than air to avoid gas entrapment within the enclosure. ActewAGL GS&I Rules REV D Page 16 of 34

17 (15) For Type 2 enclosures the following criteria applies: a) The building owner or authorised representative must undertake a hazardous area assessment in accordance with Figures 1(e) and 1(f). ActewAGL reserves the right to withhold gas supply to an installation where the hazardous area assessment has not been performed. b) In accordance with AS/NZS , the building owner or authorised representative must obtain a hazardous area dossier, for the Type 2 enclosure. Prior to gas supply, ActewAGL must sight the hazardous area dossier for the Type 2 enclosure. ActewAGL reserves the right to withhold gas supply to an installation where the hazardous area dossier cannot be sighted. c) Figure 1(e) classifies the default hazardous area generated by a meter set/regulator set installed in a Type 2 enclosure which is naturally ventilated. The building owner or authorised representative must obtain certification from a design engineer that the Type 2 enclosure has undergone a ventilation assessment in accordance with AS/NZS , deeming the Type 2 enclosure to have adequate natural ventilation utilising Figure 1(e) classification. Downgrading of Figure 1(e) classification to non-hazardous is permitted as long as the ventilation assessment confirms the downgrade is justifiable, and certification is provided. Certification shall form part of the hazardous area dossier. d) Figure 1(f) classifies the default hazardous area generated by a typical meter set/regulator set installed in a Type 2 enclosure fitted with mechanical ventilation. Classifications shown in Figure 1(f) assume a medium degree of ventilation. The building owner or authorised representative must obtain certification from a design engineer to downgrade this classification. Certification shall be a ventilation assessment in accordance with AS/NZS Any certification, if undertaken, shall form part of the hazardous area dossier. (16) Ventilation by mechanical means must service the meter set/regulator set Type 2 enclosure only and not ventilate any other area of the building. (17) Fan motors shall be remote from the exhaust duct (indirect drive) or be rated to operate in a Zone 1 hazardous area. (18) Ventilation ducts from the Type 2 enclosure that pass through a wall must be fitted with an appropriate fire damper. (19) The meter set/regulator set may be installed in a plant room where the plant room must meet the relevant Australian Standards and all Type 2 enclosures clauses in this section (3.4.2) of the GS&I Rules; (20) Where required by BCA, the Type 2 enclosure will be fitted with a fire sprinkler. (21) Where required by BCA, the Type 2 enclosure will be fitted with a smoke detector. (22) The building owner or authorised representative shall be responsible for the maintenance and upkeep of fire protection systems, gas detection systems, hazardous area rated equipment, ventilation equipment and integrity of any vent lines. ActewAGL GS&I Rules REV D Page 17 of 34

18 (23) The building owner or authorised representative shall maintain maintenance records of the fire protection system, gas detection system, hazardous area dossier, hazardous area rated equipment, ventilation equipment and vent lines for review by ActewAGL at any time. (24) The building owner or authorised representative shall be responsible for ensuring no obstructions are placed on either side of the Type 2 enclosure door(s). (25) The Type 2 enclosure door(s) must be fitted with a lock that an ActewAGL gas distribution key can open. ActewAGL GS&I Rules REV D Page 18 of 34

19 Figure 1(a). Minimum clearances for meter set maintenance access (Available from the ActewAGL website) Available from ActewAGL website ActewAGL GS&I Rules REV D Page 19 of 34

20 Figure 1 (b). Clearances for domestic meter installations (Available from ActewAGL website) ActewAGL GS&I Rules REV D Page 20 of 34

21 Figure 1(c). Type 1 enclosure - Free Standing (Available from ActewAGL website) ActewAGL GS&I Rules REV D Page 21 of 34

22 ActewAGL Gas Service and Installation Rules Figure 1(d). Type 1 enclosure - Adjacent to Wall ActewAGL GS&I Rules REV D (Available from ActewAGL website) Page 22 of 34

23 Figure 1(e). Type 2 enclosure Natural Ventilation (Available from ActewAGL website) ActewAGL GS&I Rules REV D Page 23 of 34

24 ActewAGL Gas Service and Installation Rules Figure 1(f). Type 2 enclosure Mechanical Ventilation ActewAGL GS&I Rules REV D (Available from ActewAGL website) Page 24 of 34

25 Figure 1(g). Meter set installation design for a Type 1 enclosure or Type 2 enclosure (Available from ActewAGL website) ActewAGL GS&I Rules REV D Page 25 of 34

26 Figure 2. Examples of appropriate permanent safety barriers Enclosures not shown ActewAGL GS&I Rules REV D Page 26 of 34

27 4 APPENDICES 4.1 Appendix A: Scope of Gas Work ActewAGL GS&I Rules REV D Page 27 of 34

28 ActewAGL GS&I Rules REV D Page 28 of 34

29 ActewAGL GS&I Rules REV D Page 29 of 34

30 4.2 Appendix B - Domestic Gas Meter Location Reference Drawings (Available from ActewAGL website) ActewAGL GS&I Rules REV D Page 30 of 34

31 4.3 Appendix D- Scope of AS/NZS in Natural Gas Supply Chain Reproduced from AS/NZS : 2008 ActewAGL GS&I Rules REV D Page 31 of 34

32 4.4 Appendix E Signage Type 1 Enclosures: Flammable Gas Use for Figure 1(c) & Figure 1(d) Type 1 enclosures 300 x 200 mm 300 x 250 mm ActewAGL GS&I Rules REV D Page 32 of 34

33 4.6 Zone 2 Hazardous Area Type 2 Enclosures: Natural Ventilation Use for Figure 1(e) Type 2 enclosure 300 x 200 mm 300 x 250 mm ActewAGL GS&I Rules REV D Page 33 of 34

34 4.7 Zone 1 Hazardous Area Type 2 Enclosures: Mechanical Ventilation Use for Figure (f) Type 2 enclosure 300 x 200 mm 300 x 250 mm ActewAGL GS&I Rules REV D Page 34 of 34