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  • AS 3814-2009

    AvailableSuperseded An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard. Its availability is maintained where it is referenced in legislation/regulations or in other Standards and its use should be restricted to where so referenced. No responsibility is taken by SAI Global as to the ongoing technical validity of such a Standard, the responsibility resting with the referencing authority.
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    Industrial and commercial gas-fired appliances

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s): 

    Published date:  12-08-2009

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 3814-2009 INDUSTRIAL AND COMMERCIAL GAS-FIRED APPLIANCES
    4 - PREFACE
    6 - CONTENTS
    8 - SECTION 1 SCOPE, APPLICATION AND DEFINITIONS
    8 - 1.1 SCOPE
    8 - 1.1.1 General
    8 - 1.1.2 Exclusions from Standard
    8 - 1.2 APPLICATION
    8 - 1.2.1 General
    9 - 1.2.2 Appliance installation
    9 - 1.2.3 New materials and methods
    9 - 1.2.4 Unusual installations
    9 - 1.2.5 Modification or relocation of an appliance
    9 - 1.3 REFERENCED DOCUMENTS
    10 - 1.4 DEFINITIONS
    10 - 1.4.1 Accessible
    10 - 1.4.2 Air curtain
    10 - 1.4.3 Air-gas mixing machine
    10 - 1.4.4 Appliance
    10 - 1.4.4.1 Type A appliance
    11 - 1.4.4.2 Type B appliance
    11 - 1.4.5 Approved
    11 - 1.4.6 Atmospheric burner
    11 - 1.4.7 Authorized installer
    11 - 1.4.8 Auto-ignition temperature (AIT)
    11 - 1.4.9 Automatic burner
    11 - 1.4.10 Automatic ignition
    11 - 1.4.11 Bleed line
    11 - 1.4.12 Burner
    11 - 1.4.12.1 Atmospheric burner
    11 - 1.4.12.2 Automatic burner
    11 - 1.4.12.3 Forced draught burner
    11 - 1.4.12.4 Induced draught burner
    11 - 1.4.12.5 Multi-fuel alternative burner
    12 - 1.4.12.6 Multi-fuel burner
    12 - 1.4.12.7 Multi-fuel simultaneous burner
    12 - 1.4.12.8 Part automatic burner
    12 - 1.4.13 Burner off cycle
    12 - 1.4.14 Burner unit
    12 - 1.4.15 Certified/Certification
    12 - 1.4.16 Certifying body
    12 - 1.4.17 Combination gas control
    12 - 1.4.18 Combustion products
    12 - 1.4.19 Common flue
    12 - 1.4.20 Critical time
    12 - 1.4.21 Cross lighting
    12 - 1.4.22 Damper
    13 - 1.4.23 Direct-fired air heater
    13 - 1.4.24 Direct-fired oven
    13 - 1.4.25 Double block and vent
    13 - 1.4.26 Draught diverter
    13 - 1.4.27 Electronic flame safeguard
    13 - 1.4.28 Excess air
    13 - 1.4.29 Fail-safe
    13 - 1.4.30 Flame abnormality
    13 - 1.4.31 Flame detector
    13 - 1.4.32 Flame establishment period
    13 - 1.4.33 Flame failure response time
    13 - 1.4.34 Flame lift
    13 - 1.4.35 Flame proving period
    13 - 1.4.36 Flame safeguard
    14 - 1.4.37 Flame safeguard system
    14 - 1.4.38 Flue
    14 - 1.4.38.1 Common flue
    14 - 1.4.38.2 Natural draught flue
    14 - 1.4.38.3 Open flue
    14 - 1.4.38.4 Secondary flue
    14 - 1.4.38.5 Slip joint
    14 - 1.4.39 Flue gases
    14 - 1.4.40 Flue system
    14 - 1.4.41 Flue terminal
    14 - 1.4.42 Flued appliance
    14 - 1.4.43 Flueless appliance
    14 - 1.4.44 Forced draught burner
    14 - 1.4.45 Forced or induced draught combustion system
    14 - 1.4.46 Gas
    15 - 1.4.46.1 Natural gas (NG)
    15 - 1.4.46.2 Simulated natural gas (SNG)
    15 - 1.4.46.3 Town gas (TG)
    15 - 1.4.46.4 Tempered liquefied petroleum gas (TLP)
    15 - 1.4.46.5 Liquefied petroleum gas (LP gas)
    15 - 1.4.47 Gas/air ratio control
    15 - 1.4.48 Gas consumption
    15 - 1.4.49 Gasfitting work
    15 - 1.4.50 Gas pressure regulator
    15 - 1.4.51 Gas tight
    15 - 1.4.52 Hazardous conditions
    15 - 1.4.53 High gas pressure detector
    15 - 1.4.54 Hose
    15 - 1.4.55 Hose assembly
    15 - 1.4.56 Hot water boiler
    15 - 1.4.57 Ignition temperature
    16 - 1.4.58 In service
    16 - 1.4.59 Indoor flueless appliance
    16 - 1.4.60 Induced draught burner
    16 - 1.4.61 Injector
    16 - 1.4.62 Interlock
    16 - 1.4.63 Intermittent pilot
    16 - 1.4.64 Interrupted pilot
    16 - 1.4.65 Leakage detection system
    16 - 1.4.66 Light back
    16 - 1.4.67 Limit device
    16 - 1.4.68 Lockout
    16 - 1.4.69 Lower explosive limit (LEL)
    16 - 1.4.70 Low-gas-pressure detector
    16 - 1.4.71 Manual ignition
    17 - 1.4.72 Mixing blower
    17 - 1.4.73 Mixing tube
    17 - 1.4.74 Modification
    17 - 1.4.75 Multi-fuel alternative burner
    17 - 1.4.76 Multi-fuel burner
    17 - 1.4.77 Multi-fuel simultaneous burner
    17 - 1.4.78 Natural draught
    17 - 1.4.79 Natural draught burner
    17 - 1.4.80 Natural draught flue
    17 - 1.4.81 No-flow
    17 - 1.4.82 Nominal gas consumption
    17 - 1.4.83 Non-return valve
    17 - 1.4.84 Open flued appliance
    17 - 1.4.85 Operating pressure
    17 - 1.4.86 Over-pressure protection system
    18 - 1.4.87 Over-temperature cut-out device
    18 - 1.4.88 Over-temperature limiting device
    18 - 1.4.89 Part automatic burner
    18 - 1.4.90 Permanent pilot
    18 - 1.4.91 Pilot
    18 - 1.4.92 Position indicator switch
    18 - 1.4.93 Closed position indicator switch
    18 - 1.4.94 Open position indicator switch
    18 - 1.4.95 Position-proving system
    18 - 1.4.96 Process after-burner
    18 - 1.4.97 Programmable electronic system (PES)
    18 - 1.4.98 Programming flame safeguard
    18 - 1.4.99 Proof-of-closure switch
    18 - 1.4.100 Protected pilot
    18 - 1.4.101 Purge (or purging)
    19 - 1.4.102 Purge volume
    19 - 1.4.103 Rated working pressure
    19 - 1.4.104 Regulator
    19 - 1.4.105 Relief device
    19 - 1.4.106 Safe start check
    19 - 1.4.107 Safety shutdown
    19 - 1.4.108 Safety shut off system
    19 - 1.4.109 Safety shut off system, double block and vent
    19 - 1.4.110 Safety shut off valve
    19 - 1.4.111 Set pressure
    19 - 1.4.112 Start gas
    19 - 1.4.113 Steam boiler
    19 - 1.4.114 Stoichiometric combustion
    20 - 1.4.115 Supervised burner
    20 - 1.4.116 Supervised pilot
    20 - 1.4.117 Technical regulator
    20 - 1.4.118 Temperature limit device
    20 - 1.4.119 Test firing valve
    20 - 1.4.120 Thermostat
    20 - 1.4.121 Valve
    20 - 1.4.122 Valve train
    20 - 1.4.123 Vent line
    20 - 1.4.124 Vent valve, double block and vent safety shut off system
    20 - 1.4.125 Water heater
    21 - SECTION 2 REQUIREMENTS FOR DESIGN AND CONSTRUCTION
    21 - 2.1 GENERAL REQUIREMENTS
    21 - 2.1.1 Appliance design
    21 - 2.1.2 Suitability for location
    21 - 2.1.3 Controls and indicating devices
    21 - 2.1.4 Design of adjustable devices
    21 - 2.1.5 Appliance to be well constructed
    21 - 2.1.6 Appliance parts to be secure against accidental displacement
    21 - 2.1.7 Appliance parts to be secure for satisfactory operation
    22 - 2.1.8 Appliance to be free of sharp edges
    22 - 2.1.9 Appliance supports to be of adequate strength
    22 - 2.1.10 Provision to be made for sampling flue gases
    22 - 2.2 CONTROLS, BURNER AND SAFETY DEVICE ACCESS
    22 - 2.3 FLAME VISIBILITY
    22 - 2.3.1 Flame to be visible to maintenance personnel
    22 - 2.3.2 Visual indication of flame to operator
    22 - 2.4 TEMPERATURES OF SURFACES AND COMPONENTS
    23 - 2.5 RESTRICTION ON ELECTRICAL CONNECTIONS
    23 - 2.5.1 Ease of connection
    23 - 2.5.2 Limit on cross-connection
    23 - 2.6 ACCESSIBILITY OF MANUAL CONTROLS
    23 - 2.7 MATERIALS
    23 - 2.7.1 Materials to be adequate for their intended application
    23 - 2.7.2 Restriction on use of zinc-base die-castings
    23 - 2.7.3 Materials to be suitable for gas
    24 - 2.8 GAS PIPEWORK AND VALVE TRAINS
    24 - 2.8.1 Gas pipework and valve trains
    24 - 2.8.2 Enclosure for a valve train
    25 - 2.8.3 Pressure rating of valve train components
    25 - 2.8.3.1 Upstream of and including appliance gas pressure regulator
    25 - 2.8.3.2 Downstream of appliance gas pressure regulator
    25 - 2.8.4 Requirements where pressurized air, oxygen or a standby gas is to be used
    25 - 2.8.5 Multi-position manual control valves
    25 - 2.8.6 Design of valve handles, dials and pointers
    25 - 2.8.7 Appliance isolating valve
    25 - 2.8.7.1 Appliance isolating valve to be fitted
    25 - 2.8.7.2 Requirements for appliance isolating valve
    26 - 2.8.7.3 Location of appliance isolating valve
    26 - 2.8.7.4 Identification of appliance isolating valve
    26 - 2.8.7.5 Connection of appliance isolating valve
    26 - 2.8.8 Main Burner Isolation
    26 - 2.8.8.1 Main burner isolation valve
    26 - 2.8.8.2 Main burner isolation for commissioning
    27 - 2.8.9 Restriction on test firing valve
    27 - 2.8.10 Pilot burner isolating valve
    27 - 2.9 GAS PRESSURE REGULATION
    27 - 2.9.1 Gas pressure regulator to be fitted
    27 - 2.9.2 Requirements for a gas pressure regulator
    28 - 2.9.4 Position of gas pressure regulator
    28 - 2.9.5 Venting of gas pressure regulator
    28 - 2.10 GAS OVER-PRESSURE PROTECTION
    28 - 2.10.1 Requirement where over-pressure protection shuts off the gas supply
    28 - 2.10.2 Where over-pressure protection system is to be fitted
    28 - 2.10.3 Setting of over-pressure protection system
    29 - 2.10.4 Location of over-pressure protection system sensing point
    29 - 2.11 GAS LOW-PRESSURE PROTECTION
    29 - 2.11.1 Low-gas-pressure detector to be fitted
    29 - 2.11.2 Requirements of low-gas-pressure detector
    29 - 2.12 GAS PRESSURE TEST POINTS
    29 - 2.12.1 Location of pressure test points
    29 - 2.12.2 Maximum orifice size of a pressure test point
    29 - 2.12.3 Sealing of a pressure test point
    30 - 2.13 GAS FILTER
    30 - 2.13.1 Filter to be fitted
    30 - 2.13.2 Requirements and location of filter
    30 - 2.14 SAFETY SHUT OFF SYSTEMS
    30 - 2.14.1 Safety shut off valve and vent valve
    30 - 2.14.2 Function of safety shut off system
    30 - 2.14.3 Safety shut off valve system requirements for main and start gas supplies
    30 - 2.14.3.1 General
    31 - 2.14.3.2 Concession for atmospheric burner not exceeding 500MJ/h
    31 - 2.14.3.3 Concession for atmospheric burner not exceeding 1GJ/h
    31 - 2.14.3.4 Concession for forced or induced draught burner up to 200MJ/h
    31 - 2.14.3.5 Concession for forced or induced draught burner up to 1GJ/h
    31 - 2.14.3.6 Concession for a main burner up to 1GJ/h igniting at low rate
    32 - 2.14.3.7 Concession for a burner using a separate start gas line
    32 - 2.14.3.8 Provision for start gas to be taken from between safety shut off valves for a main burner directly ignited at a low rate
    33 - 2.14.4 Energizing of automatic safety shut off valves
    33 - 2.14.5 Ignition of main burner by separate pilot
    33 - 2.14.6 Requirements for a safety shut off valve and vent valve
    33 - 2.14.6.1 Rated working pressure
    33 - 2.14.6.2 Orientation
    34 - 2.14.6.3 Size of vent valve for a double block and vent safety shut off system
    34 - 2.14.6.4 Size of vent valve for a leakage detection system
    34 - 2.14.6.5 Arrangement for manual reset vent valve
    34 - 2.14.7 Safety shut off system not to be bypassed
    34 - 2.14.8 Vent line requirement
    34 - 2.14.9 Requirements for a position-proving system
    34 - 2.14.9.1 Safety shut off valve
    34 - 2.14.9.2 Vent valve
    35 - 2.14.9.3 Position-proving system to be interlocked to prevent burner start-up
    35 - 2.14.9.4 Alarm interlock
    35 - 2.14.10 Requirements for a leakage detection system
    35 - 2.14.10.1 Compliance with Standard
    35 - 2.14.10.2 Leakage detection system to be interlocked to cause lockout
    36 - 2.14.10.3 Commencement of leakage detection test
    36 - 2.14.10.4 Alarm interlock
    36 - 2.14.10.5 Maximum allowable leakage rate
    36 - 2.14.10.6 Leakage detection system that uses gas at line pressure
    37 - 2.14.11 Function of interlocks
    37 - 2.14.12 Requirements of safety shut off system actuators
    37 - 2.14.12.1 Individual actuators to be fitted
    37 - 2.14.12.2 Single three-way valve permitted
    37 - 2.14.12.3 Use of rigidly coupled actuators
    37 - 2.15 COMBUSTION AIR SUPPLY-GENERAL REQUIREMENTS
    37 - 2.15.1 Combustion air supply equipment to be correctly sized
    38 - 2.15.2 Combustion air quality
    38 - 2.15.3 Air openings to be of adequate size
    38 - 2.15.4 Air openings not to be obstructed
    38 - 2.16 COMBUSTION AIR FOR ATMOSPHERIC BURNERS
    38 - 2.16.1 Primary aeration controls to be corrosion-resistant
    38 - 2.16.2 Effect of foreign matter on primary aeration controls to be minimal
    38 - 2.17 FORCED AND INDUCED DRAUGHT BURNERS
    38 - 2.17.1 Draught characteristics to be specified by burner manufacturer
    38 - 2.17.2 Proving air flow
    38 - 2.17.3 Self-check of air flow proving device
    38 - 2.17.3.1 Self-check to be carried out
    38 - 2.17.3.2 Failure of air flow proving device during self-check
    39 - 2.17.4 Safety shutdown to occur if air flow fails
    39 - 2.17.5 Air-gas mixtures
    39 - 2.17.5.1 Air-gas mixing machines and mixing blowers
    39 - 2.17.5.2 Maximum temperature of mixtures
    39 - 2.18 DAMPERS
    39 - 2.18.1 Requirements for a fixed or adjustable damper
    39 - 2.18.2 Requirements for an automatic damper control system
    39 - 2.18.2.1 Automatic damper to maintain satisfactory combustion
    40 - 2.18.2.2 Failure of damper mechanism
    40 - 2.18.2.3 Manual damper control
    40 - 2.19 APPLIANCE PRE-PURGING
    40 - 2.19.1 General requirements
    40 - 2.19.1.1 Function of pre-purge
    40 - 2.19.1.2 Appliance or process to be pre-purged
    40 - 2.19.1.3 Pre-purging using an inert medium
    40 - 2.19.1.4 Supply of inert purging medium to be proved
    40 - 2.19.2 Pre-purging by mechanical means
    40 - 2.19.2.1 Mechanical pre-purging required under certain conditions
    41 - 2.19.2.2 Conduct of mechanical pre-purge
    41 - 2.19.3 Pre-purging using natural draught
    41 - 2.19.3.1 Requirements for an appliance using natural draught
    41 - 2.19.3.2 Pre-purge period using natural draught
    41 - 2.19.3.3 Pre-purge period included in operating instructions
    42 - 2.19.3.4 Pre-purge where appliance doors are opened
    42 - 2.19.4 Pre-purge timer
    42 - 2.19.5 Pre-purge interlocks
    42 - 2.19.5.1 Purge flow proving device to be fitted
    42 - 2.19.5.2 Self-check of purge flow proving device
    42 - 2.19.5.3 Purging to cease if purge flow fails
    42 - 2.19.5.4 Pre-purge to reset when purge flow is re-established
    42 - 2.19.5.5 Proof of operation of zone circulation fans in appliances
    43 - 2.20 PROCESS CONTROLS
    43 - 2.20.1 Requirements where appliance safety depends on process
    43 - 2.20.2 Process limit device to cause lockout
    43 - 2.20.3 Requirements where appliance safety and operation depend on flow
    43 - 2.20.4 Provision of over temperature protection on recirculation fans
    43 - 2.21 IGNITION SYSTEMS
    43 - 2.21.1 Ignition to be safe, reliable and smooth
    43 - 2.21.2 Manual ignition systems
    43 - 2.21.2.1 Requirements for a manually-inserted gas torch
    43 - 2.21.2.2 Point of ignition to be accessible
    43 - 2.21.2.3 Explosion relief to be provided for a manually-ignited burner
    44 - 2.22 PILOT BURNERS
    44 - 2.22.1 Requirements for a pilot burner with a single main burner
    44 - 2.22.2 Requirements for supervised pilot burners with multiple main burners
    44 - 2.22.3 Flames to travel freely to all ports of a multi-port pilot
    44 - 2.22.4 Bleed lines not to affect ignition of main burner
    44 - 2.22.5 Protection from blockage
    44 - 2.23 MAIN BURNERS
    44 - 2.23.1 Ignition to be in combustion chamber
    44 - 2.23.2 Main burners subdivided into zones or sections
    44 - 2.23.3 Requirements for a burner that can be retracted or swivelled
    45 - 2.23.4 Requirements for cross-ignition
    45 - 2.23.5 Protection from blockage
    45 - 2.24 FLAME SAFEGUARD SYSTEMS
    45 - 2.24.1 Requirements for a flame safeguard system
    45 - 2.24.2 Flame safeguard system to be fitted
    45 - 2.24.3 Flame safeguard to comply with classification
    45 - 2.24.4 Maximum hold-time for a thermoelectric flame safeguard
    46 - 2.24.5 Maximum shut off time following flame failure
    47 - 2.24.6 Requirements for a flame detector
    47 - 2.24.7 Flame simulation to be prevented
    47 - 2.24.8 Detector not to detect other flame
    47 - 2.24.9 Requirements for a pilot used on atmospheric burner(s) exceeding 1 GJ/h (275 kW), or forced or induced draught burner(s)
    47 - 2.24.10 Detectors to supervise separate flames
    47 - 2.24.11 Requirements for two flame detectors used with one flame safeguard device or system
    47 - 2.24.12 Detector to ensure cross lighting is complete
    48 - 2.24.13 Requirements for flame safeguards incorporating hot surface igniters
    48 - 2.25 BLEED LINES
    48 - 2.25.1 General requirements for a bleed line termination
    48 - 2.25.2 Terminating bleed lines in a combustion chamber
    48 - 2.25.2.1 Combustion chamber to have a supervised burner
    48 - 2.25.2.2 Bleed line requirements
    48 - 2.25.2.3 Bleed line termination to be protected against blockage
    48 - 2.26 APPLIANCE/BURNER CONTROL CIRCUITS
    48 - 2.26.1 Requirements of control circuits
    49 - 2.26.2 Gas-actuated controls
    49 - 2.26.3 Requirements for a programmable electronic system (PES)
    50 - 2.27 GAS/AIR RATIO CONTROL
    50 - 2.27.1 General requirements
    52 - 2.27.2 Interference with interlocks
    52 - 2.27.3 Variation in control settings and control response
    52 - 2.27.4 Preheated combustion air control
    52 - 2.27.5 Requirements for independent gas and air control elements
    52 - 2.27.6 Special requirements for PES based gas/air ratio control system
    52 - 2.27.7 Additional requirements for pneumatically controlled gas/air ratio
    53 - 2.27.8 Gas/air ratio controls incorporating variable speed drive systems
    53 - 2.27.9 Use of oxygen sensing probes
    54 - SECTION 3 OPERATION
    54 - 3.1 APPLIANCE OPERATION DETAILS
    54 - 3.2 IGNITION
    54 - 3.2.1 Starting sequence interlocks before starting burner ignition source
    54 - 3.2.2 Ignition sequence
    54 - 3.2.2.1 Commencement of ignition
    54 - 3.2.2.2 Completion of ignition
    54 - 3.2.2.3 Start gas flame establishment period
    55 - 3.2.3 Start gas rate
    55 - 3.2.3.1 Start gas rate not to exceed determined values
    56 - 3.3 MAIN BURNERS
    56 - 3.3.1 Start flame proving period
    56 - 3.3.2 Main flame establishment period
    56 - 3.3.3 Main burner supervision
    56 - 3.3.3.1 Interrupted pilot
    56 - 3.3.3.2 Intermittent or permanent pilot with a forced or induced draught burner or atmospheric burner exceeding 1GJ/h (275kW)
    57 - 3.3.4 Main burner to start at reduced rate
    57 - 3.4 INTERLOCKS AND LIMIT DEVICES
    57 - 3.4.1 Interlocks and limit devices not to be rendered ineffective
    57 - 3.4.1.1 Where an interlock is to be fitted
    57 - 3.4.1.2 Interlock to be tested
    57 - 3.4.1.3 Requirements for an interlock
    58 - 3.4.2 Limit devices
    58 - 3.4.2.1 Limit device to be fitted
    58 - 3.4.2.2 Limit device not to be an operating control
    58 - 3.4.2.3 Requirements for a limit device
    58 - 3.5 OPERATION SEQUENCES
    58 - 3.5.1 Ignition sequence after power interruption
    58 - 3.5.2 Programmed sequence for automatic or part automatic burner
    59 - 3.5.3 Appliance to be left in safe condition
    59 - 3.5.4 Requirement for lockout on flame failure
    59 - 3.5.5 Reignition attempt on flame failure
    59 - 3.5.5.1 Requirements for forced or induced draught burners
    59 - 3.5.5.2 Requirements for atmospheric burners
    59 - 3.6 COMBUSTION CONDITIONS
    59 - 3.6.1 Burners to maintain satisfactory combustion conditions
    60 - 3.6.2 Leakage of combustion products to be prevented
    60 - 3.7 COMMISSIONING
    60 - 3.7.1 Commissioning checks to be carried out
    61 - SECTION 4 MARKINGS AND INSTRUCTIONS
    61 - 4.1 MARKINGS
    61 - 4.1.1 Markings to be displayed
    61 - 4.1.2 Marking of controls, dials and gauges
    61 - 4.1.3 Controls with non-standard operation
    61 - 4.2 INSTRUCTIONS
    61 - 4.2.1 Written instructions to be provided
    62 - 4.2.2 Instructions for operation
    62 - 4.2.3 Limits of safe operation to be specified
    63 - SECTION 5 SPECIAL APPLICATION REQUIREMENTS
    63 - 5.1 GENE
    63 - 5.2 HIGH INPUT GAS-FIRED APPLIANCES
    63 - 5.2.1 General
    63 - 5.2.2 Start-up where multiple main burners are fitted
    63 - 5.2.3 Manual ignition where multiple main burners are fitted
    63 - 5.2.4 Automatic ignition where multiple main burners are fitted
    63 - 5.2.5 Burner control
    63 - 5.2.6 Flame safeguards
    64 - 5.3 AIR-GAS MIXING MACHINES AND MIXING BLOWERS
    64 - 5.3.1 General
    64 - 5.3.2 Materials
    64 - 5.3.3 Strength of pipe and fittings
    64 - 5.3.4 Safety shut off system to be fitted
    64 - 5.3.5 Safety shut off system to cause lockout
    64 - 5.3.6 Air-gas ratio
    64 - 5.3.6.1 Locking provision for air-gas ratio from a mixing machine
    64 - 5.3.6.2 Limiting provision for air-gas ratio from a mixing machine
    64 - 5.3.6.3 Air-gas ratio from a mixing blower
    64 - 5.3.7 Mixing blower outlets
    65 - 5.3.8 Flashback requirements for air-gas mixing machines
    65 - 5.3.9 Rupture of blow-out disc
    65 - 5.3.10 Flame arrestor between air-gas mixing machine and burner
    65 - 5.3.11 Flame arrestor at mixing machine
    65 - 5.3.12 Flame arrestors
    65 - 5.3.13 Air-gas mixing machines - requirement for non-return valve
    66 - 5.4 SPECIAL ATMOSPHERES AND ATMOSPHERE GENERATORS
    66 - 5.4.1 General
    66 - 5.4.2 Piping for special atmospheres
    66 - 5.4.3 Storage of special atmosphere
    66 - 5.4.4 Storage container for compressed special atmosphere
    66 - 5.4.5 Venting and disposal of special atmospheres
    66 - 5.4.6 Discharge using a vent line
    66 - 5.4.7 Start-up of an atmosphere generator
    67 - 5.4.8 Ignition
    67 - 5.4.9 Requirement where the air-gas ratio is variable
    67 - 5.4.10 Requirements where the air-gas ratio is fixed
    67 - 5.4.11 Automatic relief device
    67 - 5.4.12 Flame arrestor
    67 - 5.4.13 Water-cooled equipment
    67 - 5.4.14 Exothermic atmosphere generators
    67 - 5.4.14.1 Flame safeguard requirement
    68 - 5.4.14.2 Flame safeguard bypass
    68 - 5.4.14.3 Pressure detectors to be fitted
    68 - 5.4.14.4 Pressure detectors to be interlocked
    68 - 5.4.14.5 Interlocking combustible atmosphere flow
    68 - 5.4.14.6 Purging
    68 - 5.4.14.7 Air-gas ratio control
    68 - 5.4.15 Endothermic atmosphere generators
    68 - 5.4.15.1 Safety shut off valves to be fitted
    68 - 5.4.15.2 Air shut off device
    68 - 5.4.15.3 Pressure detectors
    68 - 5.5 PROCESS AFTER-BURNERS
    68 - 5.5.1 General
    69 - 5.5.2 Control of process products
    69 - 5.5.2.1 Requirement for interlocks
    69 - 5.5.2.2 Process products-percentage of LEL
    69 - 5.5.3 Combustion air supply
    69 - 5.5.4 Shutting down of process afterburner
    69 - 5.5.5 Pre-purge
    70 - 5.6 STEAM AND HOT WATER BOILERS
    70 - 5.7 DIRECT-FIRED AIR HEATERS AND CURTAINS
    70 - 5.7.1 General
    70 - 5.7.2 Heater air supply
    70 - 5.7.3 Air flow sensing device
    70 - 5.7.4 Pre-purge
    70 - 5.7.5 Temperature limit device
    70 - 5.7.6 Start gas rate
    70 - 5.7.7 Combustion
    70 - 5.7.7.1 Limits for combustion products
    71 - 5.7.7.2 Samples of heated air to be taken
    71 - 5.7.7.3 Limitation on air temperature
    71 - 5.7.7.4 Combustion at minimum air flow
    71 - 5.7.8 Markings
    71 - 5.7.8.1 Marking plate to be fitted
    71 - 5.7.8.2 Restriction on installation
    72 - 5.8 STATIONARY GAS ENGINES AND TURBINES
    72 - 5.8.1 General
    72 - 5.8.2 Requirement for safety shut off valve system
    72 - 5.8.2.1 Safety shut off system to be fitted
    72 - 5.8.2.2 Safety shut off valves and vent valves
    73 - 5.8.2.3 Emergency isolation and vent valves
    73 - 5.8.2.4 Activation of the safety shut off system to shut off gas supply
    73 - 5.8.3 Turbine purging
    74 - 5.8.4 Gas supply flexible connection
    74 - 5.8.5 Exhaust system to be fitted
    74 - 5.8.6 Flexible connection to be fitted to exhaust line
    74 - 5.8.7 Requirements of an exhaust system
    74 - 5.8.8 Exhaust terminal location
    74 - 5.8.9 Ventilation
    74 - 5.8.10 Requirements for Ignition
    75 - 5.8.11 Extinction safety time
    75 - 5.8.12 Indirect flame monitoring
    75 - 5.9 INCINERATORS AND CREMATORS
    75 - 5.9.1 General
    75 - 5.9.2 Primary burner interlock
    75 - 5.9.3 Combustion air
    76 - 5.9.4 Pre-purge
    76 - 5.9.5 Flues
    76 - 5.9.5.1 Flues not to be interconnected
    76 - 5.9.5.2 Limiting updraught
    76 - 5.10 ROTARY PROCESS EQUIPMENT AND OVENS-DIRECT-FIRED
    76 - 5.10.1 General
    76 - 5.10.2 Purging
    76 - 5.10.3 Provision of air
    77 - 5.10.4 Explosion relief
    77 - 5.10.5 Temperature limit device
    77 - 5.10.6 Access for cleaning
    77 - 5.10.7 Processes with solvents or combustible dust
    77 - 5.10.7.1 Provision of dilution air
    77 - 5.10.7.2 Recirculation air fans
    77 - 5.10.7.3 Monitoring of solvent LEL
    78 - 5.11 SMOKE OVENS-DIRECT-FIRED
    78 - 5.11.1 Lighting torch
    78 - 5.11.2 Combustion air
    78 - 5.11.2.1 Combustion air to be provided from outside of oven
    78 - 5.11.2.2 Restrictions on the use of ducting
    78 - 5.11.2.3 Smoke not to interfere with combustion
    78 - 5.11.3 Explosion relief requirements
    78 - 5.11.4 Loading doors
    78 - 5.11.5 Sawdust trays
    78 - 5.11.6 Flue
    78 - 5.11.6.1 Minimum requirements for natural draught flue
    78 - 5.11.6.2 Flue damper
    79 - 5.12 WATER HEATERS
    79 - 5.12.1 General
    79 - 5.12.2 Thermostat
    79 - 5.12.3 Over-temperature control
    79 - 5.12.3.1 Over-temperature cut-out device to be fitted
    79 - 5.12.3.2 Over-temperature cut-out to initiate lockout
    79 - 5.12.4 Unvented water heaters
    79 - 5.12.4.1 Relief valve to be fitted
    79 - 5.12.4.2 Location of relief valves
    79 - 5.12.4.3 Heaters containing 1L of water or less
    79 - 5.12.5 Provision for draining
    80 - 5.13 MULTI-FUEL FIRING SYSTEMS
    80 - 5.13.1 Alternative multi-fuel systems
    80 - 5.13.1.1 Isolation of alternative fuel supply
    80 - 5.13.1.2 Alternative fuel system to be interlocked
    80 - 5.13.1.3 Fuel lines to be sealed on disconnection
    80 - 5.13.2 Multi-fuel simultaneous firing systems
    80 - 5.13.2.1 Maximum operating input
    80 - 5.13.2.2 Combustion air requirement
    81 - APPENDIX A - TYPICAL INFORMATION AND TECHNICAL DATA
    85 - APPENDIX B - TYPICAL PROCEDURE FOR THE APPROVAL OF INDUSTRIAL AND COMMERCIAL APPLIANCES
    86 - APPENDIX C - TYPICAL VALVE TRAIN ARRANGEMENTS
    92 - APPENDIX D - FLAME SAFEGUARD SELECTION
    94 - APPENDIX E - PRO-FORMA LETTER TO THE GAS TECHNICAL REGULATOR FROM A CONTRACTOR/COMPANY CERTIFYING THE TESTS CONDUCTED ON THE PES
    95 - APPENDIX F - GAS/AIR RATIO CONTROL PROGRAMMABLE ELECTRONIC SYSTEMS
    95 - F1 INTRODUCTION
    95 - F2 DEFINITION OF GAS/AIR RATIO CONTROL PROGRAMMABLE ELECTRONIC SYSTEMS
    95 - F3 PARAMETERISABLE SYSTEMS THAT DO NOT REQUIRE A LOW OXYGEN LIMIT DEVICE
    96 - F4 PARAMETERISABLE SYSTEMS THAT REQUIRE A LOW OXYGEN LIMIT
    96 - F5 PES GAS/AIR RATIO CONTROL SYSTEMS
    97 - F6 ADDITIONAL REQUIREMENTS FOR BURNER MANAGEMENT SYSTEMS FITTED WITH LOW OXYGEN LIMIT DEVICE
    97 - F6.1 The oxygen probe that could act as an ignition source
    97 - F6.2 With an oxygen probe that does not act as an ignition source
    98 - APPENDIX G - MAINTENANCE AND CHECKS OF SAFETY DEVICES
    98 - G1 INTRODUCTION
    98 - G2 REGULAR TESTING
    98 - G3 PERSONNEL AND ORGANIZATION
    98 - G4 GENERAL OUTLINE OF PROCEDURES
    99 - G5 TESTING SCHEDULES
    103 - APPENDIX H - TYPICAL OPERATING SEQUENCE FOR AN AUTOMATIC FORCED OR INDUCED DRAUGHT BURNER WITH INTERRUPTED PILOT
    106 - APPENDIX I - TYPICAL COMMISSIONING PROCEDURE
    106 - I1 SCOPE
    106 - I2 STAGE 1 PRELIMINARY INSPECTION
    106 - I3 STAGE 2 ACTIVATION-RUN WITHOUT FUEL
    107 - I4 STAGE 3 ACTIVATION-RUN WITH FUEL
    107 - I5 STAGE 4 OPERATION
    108 - I6 STAGE 5 COMPLETION
    109 - APPENDIX J - TYPICAL FIELD CHECK LIST

    Abstract - (Show below) - (Hide below)

    Specifies the uniform minimum requirements for the design, construction and safe operation of TypeB appliances that are intended for use with town gas, natural gas, simulated natural gas, liquefied petroleum gas and tempered liquefied petroleum gas or any combination of these gases either together or with other fuels.

    Scope - (Show below) - (Hide below)

    GeneralThis Standard provides minimum requirements for the design, construction and safe operation of Type B appliances that use town gas, natural gas, simulated natural gas, liquefied petroleum gas, tempered liquefied petroleum gas or any combination of these gases either together or with other fuels.Construction requirements given relate only to matters affecting gas-firing or to any interconnection between the gas-firing system and the safety requirements of the appliance.NOTE: Additional information regarding safety principles for industrial appliances is given in AS 1375.The Standard does not cover all the requirements for the safety of the process carried out in the appliance. Other statutory and regulatory requirements may be applicable to the appliances and/or installations that fall within the scope of this Standard. It is the installer/manufacturer’s responsibility to ensure that appliances and/or installations comply with these requirements.Installation requirements for appliances covered by this Standard are detailed in AS 5601.Exclusions from StandardThe following appliances are excluded from this Standard:(a) Manually operated bunsen type burners.(b) Simple atmospheric burners that are not fitted into a combustion chamber and burn in an open ventilated space under the control of an operator.(c) Engines other than stationary engines.

    General Product Information - (Show below) - (Hide below)

    Committee AG-011
    Document Type Standard
    Publisher Standards Australia
    Status AvailableSuperseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS 3814-1998 (AG 501).Second edition 2000.Third edition 2002.Republished and designated AS 3814-2005.Second edition 2009. Originated as AG 501-1984 Previous edition 2002. Republished and designated AS 3814-2005. Second edition 2009. Reissued incorporating Amendment No. 1 (June 2010).

    Standards Referenced By This Book - (Show below) - (Hide below)

    AS 4618-2004 Gas appliance regulators
    AS 4624-2005 Combination controls for gas (Reconfirmed 2021)
    AS IEC 61511.3-2004 Functional safety - Safety instrumented systems for the process industry sector - Guidance for the determination of the required safety integrity levels (Reconfirmed 2015)
    AS 1271-2003 Safety valves, other valves, liquid level gauges and other fittings for boilers and unfired pressure vessels
    AS 4625-2008 Electronic flame safeguards and flame detectors
    AS 1375-1985 Industrial fuel-fired appliances (known as the SAA Industrial Fuel-fired Appliances Code)
    AS IEC 61511.1-2004 Functional safety - Safety instrumented systems for the process industry sector - Framework, definitions, systems, hardware and software requirements
    AS 1357.2-2005 Valves primarily for use in heated water systems Control valves
    AS IEC 61511.2-2004 Functional safety - Safety instrumented systems for the process industry sector - Guidelines for the application of AS IEC 61511-1
    AS 4620-2004 Thermoelectric flame safeguards (Reconfirmed 2021)
    AS 5601-2004 Gas installations
    AS 4732-2002 LP Gas fuel systems for marine engines
    AS 2593-2004 Boilers - Safety management and supervision systems (Reconfirmed 2016)
    AS/NZS 1425:2007 LP Gas fuel systems for vehicle engines
    AS/NZS 1869:1996 Hose and hose assemblies for liquefied petroleum gases (LP Gas), natural gas and town gas
    AS 4629-2005 Automatic shut off valves and vent valves
    AS 1357.1-2009 Valves primarily for use in heated water systems Protection valves
    AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)
    AS 4630-2005 Leakage detection systems
    AS 4617-2004 Manual shut off gas valves
    AS/NZS 1596:2008 The storage and handling of LP Gas

    Standards Referencing This Book - (Show below) - (Hide below)

    AS/NZS 5601.2:2010 Gas installations LP Gas installations in caravans and boats for non-propulsive purposes
    AS/NZS 60079.10.1:2009 Explosive atmospheres Classification of areas - Explosive gas atmospheres (IEC 60079-10-1, Ed.1.0(2008) MOD)
    AS 5092-2009 CNG refuelling stations
    AS/NZS 5601.1:2013 Gas installations General installations
    AS/NZS 5601.2:2013 Gas installations LP Gas installations in caravans and boats for non-propulsive purposes
    AS/NZS 5601.1:2010 Gas installations General installations
    AS 4983-2010 Gas fuel systems for forklifts and industrial engines
    AS 1375-2013 Industrial fuel-fired appliances
    AS/NZS 1596:2014 The storage and handling of LP Gas
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