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    AS 1697-2005

    AvailableSuperseded An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard.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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    Installation and maintenance of steel pipe systems for gas

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

    Language(s):  English

    Published date:  02-18-2005

    Publisher:  Standards Australia

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

    1 - AS 1697-2005 INSTALLATION AND MAINTENANCE OF STEEL PIPE SYSTEMS FOR GAS
    4 - PREFACE
    5 - CONTENTS
    7 - SECTION 1 SCOPE AND GENERAL
    7 - 1.1 SCOPE
    7 - 1.2 EXCLUSIONS
    8 - 1.3 RETROSPECTIVE APPLICATION
    8 - 1.4 REFERENCED DOCUMENTS
    8 - 1.5 RECORDS
    8 - 1.6 DEFINITIONS
    8 - 1.6.1 Actual thickness
    8 - 1.6.2 Approved
    8 - 1.6.3 Authority
    8 - 1.6.4 Casing
    9 - 1.6.5 Consumer piping
    9 - 1.6.6 Fuel gas
    9 - 1.6.7 Inspector
    9 - 1.6.8 Internal design pressure
    9 - 1.6.9 Liquefied petroleum gas/LP Gas
    9 - 1.6.10 Main
    9 - 1.6.11 Maximum allowable operating pressure (MAOP)
    9 - 1.6.12 Monitoring regulator
    9 - 1.6.13 Network
    9 - 1.6.14 Network operator
    9 - 1.6.15 Nominal thickness
    9 - 1.6.16 Odorization
    9 - 1.6.17 Pressure
    10 - 1.6.18 Pressure design thickness
    10 - 1.6.19 Pressure-limiting station
    10 - 1.6.20 Pressure-regulating station
    10 - 1.6.21 Pressure-relief station
    10 - 1.6.22 Regulator
    10 - 1.6.23 Required thickness
    10 - 1.6.24 Service
    10 - 1.6.25 Service regulator
    10 - 1.6.26 Shall
    10 - 1.6.27 Should
    10 - 1.6.28 Specified minimum yield stress (SMYS)
    10 - 1.6.29 Statutory authority
    10 - 1.6.30 Thickness
    10 - 1.7 PRESSURE CLASSIFICATIONS
    12 - SECTION 2 MATERIALS AND COMPONENTS
    12 - 2.1 NEW MATERIALS AND NEW COMPONENTS
    12 - 2.2 RECLAIMED MATERIALS AND RECLAIMED COMPONENTS
    12 - 2.3 IDENTIFICATION
    15 - 2.4 PIPE THREADS, THREADED PIPE FITTINGS, FLANGED PIPE JOINTS AND WELDED PIPE JOINTS
    15 - 2.5 VALVES, REGULATORS, FITTINGS AND ACCESSORIES
    15 - 2.5.1 General
    15 - 2.5.2 Flanges and flanged fittings
    15 - 2.5.3 Gaskets and ring joints
    15 - 2.5.4 Valves and regulators
    17 - SECTION 3 DESIGN
    17 - 3.1 GENERAL
    17 - 3.2 MAXIMUM ALLOWABLE OPERATING PRESSURE (MAOP)
    17 - 3.3 MAXIMUM ALLOWABLE HOOP STRESS
    17 - 3.4 WALL THICKNESS
    17 - 3.4.1 Steel casing
    17 - 3.4.2 Pipe
    18 - 3.5 CORROSION MITIGATION
    18 - 3.5.1 General
    19 - 3.5.2 Insulating joints
    19 - 3.6 SUPPORTS
    19 - 3.6.1 Anchoring
    19 - 3.6.2 Flexibility
    19 - 3.6.3 Vibration
    19 - 3.6.4 Material for supports
    19 - 3.6.5 Forces on pipe joints
    19 - 3.6.6 Attachment of supports or anchors
    19 - 3.6.7 Interference
    19 - 3.6.8 Insulation
    19 - 3.7 BENDS, ELBOWS AND MITRES
    21 - 3.8 EXPANSION AND FLEXIBILITY
    22 - SECTION 4 WELDING
    22 - 4.1 GENERAL
    22 - 4.2 PREHEAT AND POST-WELD HEAT TREATMENT
    22 - 4.3 WELDING POSITIONS
    22 - 4.4 QUALIFICATION OF A WELDING PROCEDURE
    22 - 4.5 ASSESSMENT OF A TEST WELD TO QUALIFY A WELDING PROCEDURE
    22 - 4.5.1 Method of assessment
    22 - 4.5.2 Visual examination
    22 - 4.5.3 Non-destructive examination
    23 - 4.5.4 Destructive tests
    25 - 4.5.5 Repeated tests
    25 - 4.5.6 Portability of a qualified welding procedure
    25 - 4.5.7 Period of validity
    25 - 4.5.8 Disqualification of a qualified welding procedure
    26 - 4.6 QUALIFICATION OF A WELDER
    26 - 4.7 DISQUALIFICATION OF A WELDER
    26 - 4.8 DESIGN OF A WELDED JOINT
    26 - 4.8.1 General
    28 - 4.8.2 Butt welds between components of equal nominal wall thickness
    28 - 4.8.3 Butt welds between components of unequal nominal wall thickness
    28 - 4.8.4 Reinforcement of a butt weld
    28 - 4.8.5 Fillet weld
    28 - 4.8.6 Dimensions of a fillet-welded repair sleeve
    29 - 4.8.7 Socket weld
    29 - 4.8.8 Seal weld
    29 - 4.8.9 Reinforcement of a welded branch connection
    29 - 4.8.10 Reinforcement of multiple openings
    29 - 4.8.11 Forged branch fitting
    29 - 4.8.12 Fabricated elbow or bend
    29 - 4.8.13 Distance between welds
    32 - 4.9 PRODUCTION WELDS
    32 - 4.10 WELDING ON A GAS MAIN AFTER COMMISSIONING OR AFTER PRESSURE TEST
    32 - 4.11 WELDING ONTO AN IN-SERVICE GAS MAIN
    33 - 4.12 ASSESSMENT OF PRODUCTION WELDS AND REPAIR WELDS
    33 - 4.12.1 General
    33 - 4.12.2 Methods of examination and assessment
    33 - 4.12.3 Visual examination
    33 - 4.13 CRITERIA OF ACCEPTANCE FOR GIRTH WELD DISCONTINUITIES
    34 - 4.14 REPAIR OF AN UNACCEPTABLE WELD
    34 - 4.14.1 General
    34 - 4.14.2 Repair
    34 - 4.14.3 Inspection
    34 - 4.15 REMOVAL OF AN ARC BURN AND CUTTING OUT OF AN UNACCEPTABLE WELD OR ARC BURN
    35 - SECTION 5 CONSTRUCTION AND INSTALLATION
    35 - 5.1 HANDLING
    35 - 5.1.1 Storage
    35 - 5.1.2 Transportation
    35 - 5.1.3 Lifting
    35 - 5.1.4 Stresses induced during laying
    35 - 5.2 PROTECTION
    35 - 5.2.1 Covering ends
    36 - 5.2.2 Cleaning internally
    36 - 5.2.3 Natural hazards
    36 - 5.2.4 Electrically insulated joints
    36 - 5.2.5 Cathodic protection connections
    36 - 5.3 POSITIONING
    36 - 5.3.1 Alignment
    36 - 5.3.2 Valves
    36 - 5.4 BURYING
    36 - 5.4.1 Cover requirements and underground protection
    37 - 5.4.2 Width of trenches
    38 - 5.4.3 Grading
    38 - 5.4.4 Bedding
    38 - 5.4.5 Protection of coatings
    38 - 5.4.6 Support of steel pipes
    38 - 5.4.7 Backfilling
    38 - 5.4.8 Reinstatement
    39 - 5.5 INSPECTORS
    39 - 5.6 ITEMS TO BE INSPECTED
    39 - 5.7 MARKERS
    39 - 5.8 COMPONENTS AND FABRICATED ASSEMBLIES
    40 - SECTION 6 PRESSURE TESTING
    40 - 6.1 GENERAL
    40 - 6.2 SAFETY
    40 - 6.3 TEST PRESSURES
    40 - 6.3.1 Minimum test pressure
    40 - 6.3.2 Maximum test pressure
    41 - 6.3.3 Testing at operating pressure
    41 - 6.4 TESTING MAINS AND SERVICES
    41 - 6.5 HOLD PERIOD
    41 - 6.6 PREPARATION OF THE TEST SECTION
    41 - 6.7 PRESSURIZATION
    42 - 6.8 TEST PROCEDURE
    42 - 6.9 ASSESSMENT OF PRESSURE TEST
    42 - 6.10 DISPOSAL OF TEST MEDIUM
    42 - 6.11 REPORTS AND RECORDS
    44 - SECTION 7 COMMISSIONING
    44 - 7.1 SAFETY PRECAUTIONS
    44 - 7.2 PURGING
    44 - 7.2.1 General
    44 - 7.2.2 Purge procedures
    44 - 7.3 COMMISSIONING OF GAS MAINS
    44 - 7.3.1 General
    45 - 7.3.2 Mixing and dilution during purging
    45 - 7.3.3 Planning
    45 - 7.4 PRESSURE-LIMITING REGULATORS
    45 - 7.5 OVER-PRESSURE SAFETY DEVICES
    45 - 7.6 ODORANT FADE
    46 - SECTION 8 MAINTENANCE
    46 - 8.1 GENERAL
    46 - 8.2 CORROSION PROTECTION SYSTEMS
    46 - 8.3 ELECTRICAL HAZARDS
    46 - 8.4 REPAIRS
    46 - 8.4.1 General
    46 - 8.4.2 Mains
    46 - 8.4.3 Services
    47 - APPENDIX A - REFERENCED DOCUMENTS
    50 - APPENDIX B - APPLICATION OF VARIOUS TYPES OF TEST EQUIPMENT
    50 - B1 GENERAL
    50 - B2 VOLUMETRIC DISPLACEMENT METHODS
    50 - B3 PRESSURE LOSS METHODS

    Abstract - (Show below) - (Hide below)

    Specifies materials, design, construction, installation, testing and maintenance requirements for steel piping systems covered by AS4645, for the distribution of fuel gas suitable for domestic, commercial or industrial uses, where the pressure of the gas is not greater than 1050kPa and the operating temperature range of the materials is from (30 degrees Celsius to 120 degrees Celsius; or where the hoop stress level is not greater than 20 percent of the specified minimum yield stress of the pipe used in that system.

    Scope - (Show below) - (Hide below)

    This Standard specifies materials, design, construction, installation, testing and maintenance requirements for steel piping systems covered by AS4645, for the distribution of fuel gas suitable for domestic, commercial or industrial uses, where—the pressure of the gas is not greater than 1050kPa and the operating temperature range of the materials is from (30°C to 120°C; orwhere the hoop stress level is not greater than 20% of the Specified Minimum Yield Stress (SMYS) of the pipe used in that system.The Standard does not extend to the exclusions listed in Clause1.2. Some requirements of this Standard are suitable for consumer piping operating at >200kPa, being not otherwise provided in AS5601. The operator of such piping should decide which requirements are appropriate, and should obtain any necessary agreement from the regulator having jurisdiction over the operation of that piping.The relevant technical regulator may regard this standard as appropriate for other than fuel gas.

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

    Committee AG-008
    Document Type Standard
    Publisher Standards Australia
    Status AvailableSuperseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as AS 1697-1981.Second edition 2005. Originated as AS 1697-1981. Second edition 2005.

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

    AS 1112.1-2000 ISO metric hexagon nuts Style 1 - Product grades A and B
    AS 1110.1-2000 ISO metric hexagon bolts and screws - Product grades A and B - Bolts
    AS 3673-1989 Malleable cast iron threaded pipe fittings
    AS 1112.2-2000 ISO metric hexagon nuts Style 2 - Product grades A and B
    AS 3688-2005 Water supply - Metallic fittings and end connectors
    AS 1579-2001 Arc-welded steel pipes and fittings for water and wastewater (Reconfirmed 2018)
    AS 3990-1993 Mechanical equipment - Steelwork (Reconfirmed 2016)
    AS 1210-1997 Pressure vessels
    AS 2812-2005 Welding, brazing and cutting of metals - Glossary of terms (Reconfirmed 2018)
    AS 2205.2.1-2003 Methods for destructive testing of welds in metal Transverse butt tensile test
    AS 2885.2-2007 Pipelines - Gas and liquid petroleum Welding
    AS 2205.3.1-2003 Methods for destructive testing of welds in metal Transverse guided bend test (Reconfirmed 2018)
    AS 1112.4-2000 ISO metric hexagon nuts Chamfered thin nuts - Product grades A and B
    AS 3723-1989 Installation and maintenance of plastics pipe systems for gas
    AS 4041-2006 Pressure piping (Reconfirmed 2016)
    AS 4645-2005 Gas distribution network management
    AS 2885.2-2002 Pipelines - Gas and liquid petroleum - Welding
    AS 2885.1-2007 Pipelines - Gas and liquid petroleum - Design and construction
    AS/NZS 1596:2002 The storage and handling of LP Gas
    AS 2885.1-1997 Pipelines - Gas and liquid petroleum Design and construction
    AS 2528-1982 Bolts, studbolts and nuts for flanges and other high and low temperature applications
    AS 1722.1-1975 Pipe threads of Whitworth form Sealing pipe threads (metric units)
    AS/NZS 1518:2002 External extruded high-density polyethylene coating system for pipes (Reconfirmed 2016)
    AS 1111.1-2000 ISO metric hexagon bolts and screws - Product grade C - Bolts
    AS/NZS 2648.1:1995 Underground marking tape Non-detectable tape (Reconfirmed 2020)
    AS 2205.6.1-2003 Methods for destructive testing of welds in metal Weld joint hardness test
    AS 2832.1-2004 Cathodic protection of metals Pipes and cables
    AS 1074-1989 Steel tubes and tubulars for ordinary service (Reconfirmed 2018)
    AS/NZS 2885.5:2002 Pipelines - Gas and liquid petroleum Field pressure testing
    AS 3688-1994 Water supply - Copper and copper alloy body compression and capillary fittings and threaded-end connectors
    AS 4041-1998 Pressure piping
    AS 2205.5.1-2003 Methods for destructive testing of welds in metal Macro metallographic test for cross-section examination
    AS 1112.3-2000 ISO metric hexagon nuts - Product grade C
    AS 5601-2004 Gas installations
    AS 2129-2000 Flanges for pipes, valves and fittings (Reconfirmed 2016)

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

    AS/NZS 1596:2002 The storage and handling of LP Gas
    AS 3961-2005 The storage and handling of liquefied natural gas
    AS 2832.1-2004 Cathodic protection of metals Pipes and cables
    AS 3846-2005 The handling and transport of dangerous cargoes in port areas
    AS 1796-2001 Certification of welders and welding supervisors (Reconfirmed 2016)
    AS 3723-1989 Installation and maintenance of plastics pipe systems for gas
    AS 4041-2006 Pressure piping (Reconfirmed 2016)
    AS/NZS 1418.10:2011 Cranes, hoists and winches Mobile elevating work platforms
    AS 2885.2-2007 Pipelines - Gas and liquid petroleum Welding
    AS 2033-1980 Installation of polyethylene pipe systems
    AS 2885.1-2007 Pipelines - Gas and liquid petroleum - Design and construction
    AS 3920.1-1993 Assurance of product quality Pressure equipment manufacture
    AS/NZS 1596:2008 The storage and handling of LP Gas
    AS 4568-2005 Preparation of a safety and operating plan for gas networks
    AS 2832.2-2003 Cathodic protection of metals Compact buried structures
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