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AS
AS 1697-2005

AS 1697-2005

AvailableSuperseded

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An Available Superseded Standard is one, which has been made available for a period of time although it has been formally superseded by another Standard.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.

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

18-02-2005

Publisher

Standards Australia

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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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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

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.

Committee
AG-008
DocumentType
Standard
ISBN
0 7337 6464 9
Pages
46
PublisherName
Standards Australia
Status
AvailableSuperseded
SupersededBy
Supersedes
UnderRevision

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.

Originated as AS 1697-1981.
Second edition 2005.

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 (Reconfirmed 2018)
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)

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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