As 2885 1 Pipeline

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COMMITTEE ME-038 DR 04561 (Project ID: 2425) Draft for Public Comment Australian Standard LIABLE TO ALTERATIONDO NOT USE AS A STANDARD BEGINNING DATE FOR COMMENT: 17 December 2004 CLOSING DATE FOR COMMENT: 18 February 2005 PipelinesGas and liquid petroleum Part 1: Design and construction COPYRIGHT Draft for Public Comment Australian Standard The committee responsible for the issue of this draft comprised representatives of organizations interested in the subject matter of the proposed Standard.These organizations are listed on the inside back cover. Comments are invited on the technical content, wording and general arrangement of the draft.The preferred method for submission of comment is to download the MS Word comment form found at http://www.standards.com.au/Catalogue/misc/Public%20Comment%20Form.doc. This form also includes instructions and examples of comment submission. When completing the comment form ensure that the number of this draft, your name and organization (if applicable) is recorded. Please place relevant clause numbers beside each comment. Editorial matters (i.e. spelling, punctuation, grammar etc.) will be corrected before final publication. The coordination of the requirements of this draft with those of any related Standards is of particular importance and you are invited to point out any areas where this may be necessary. Please provide supporting reasons and suggested wording for each comment. Where you consider that specific content is too simplistic, too complex or too detailed please provide an alternative. If the draft is acceptable without change, an acknowledgment to this effect would be appreciated. When completed, this form should be returned to the Projects Manager, Kris Longmore via email to Kris.longmore@standards.org.au. Normally no acknowledgment of comment is sent. All comments received electronically by the due date will be put before the relevant drafting committee. Because Standards committees operate electronically we cannot guarantee that comments submitted in hard copy will be considered along with those submitted electronically. Where appropriate, changes will be incorporated before the Standard is formally approved. If you know of other persons or organizations that may wish to comment on this draft Standard, could you please advise them of its availability. Further copies of the draft are available from the Customer Service Centre listed below and from our website at http://www.standards.com.au/. STANDARDS AUSTRALIA Customer Service Centre Telephone: 1300 65 46 46 Facsimile: 1300 65 49 49 e-mail: mailto:sales@standards.com.au Internet: http://www.standards.com.au/ Draft for Public Comment STANDARDS AUSTRALIA Committee ME-038Petroleum Pipelines Subcommittee ME-038-01 Design and Construction DRAFT Australian Standard PipelinesGas and liquid petroleum Part 1:Design and construction (To be AS 2885.1) ThisStandardspecifiesrequirementsforthedesignandconstructionofcarbonandcarbon manganesesteelpipelinesandassociatedpipingandcomponentsthatareusedtotransmit singleandmultiphasehydrocarbonfluids.Majorchangesproposedinthisdraftrelatetoa structuralbasisforincreasingthemaximumallowableoperatingpressureofaqualifying existing pipeline. These benefits are supported by robust requirements for safety, structural design, construction, testing and record keeping. Comment on the draft is invited from people and organizations concerned with this subject. Itwouldbeappreciatedifthosesubmittingcommentwouldfollowtheguidelinesgivenon the inside front cover. ThisdocumentisadraftAustralianStandardonlyandisliabletoalterationinthelightof comment received.It is not to be regarded asanAustralianStandarduntil finally issued as such by Standards Australia. DRAFT ONLY2DRAFT ONLY DR04561.docPREFACE ThisStandardwaspreparedbytheJointStandardsAustralia/StandardsNewZealand Committee ME-038onPetroleumPipelines,tosupersedeAS 28851997,PipelineGas andliquidpetroleum.AS 1697,Gastransmissionanddistributionsystemsiscurrently undergoingrevision and will bepublishedas adistributionpipeline standard, and has been deleted as a reference standard. ThisStandardistheresultofaconsensusamongAustralianandNewZealand representatives on the Joint Committee to produce it as an Australian Standard. The objective of this Standard is to provide requirements for the design and construction of steel pipelines and associatedpiping and components that are used to transmitsingle phase and multiphase hydrocarbon fluids. Thisstandardprovidesguidelinesforuseofpipemanufacturedfromcertainnonsteelor corrosion resistant materials. ThisStandardisoneofthefollowingseries,whichreferstohighpressurepetroleum pipelines: AS 2885PipelinesGas and liquid petroleum 2885.0Part 0:General Requirements 2885.1Part 1:Design and construction (this Standard) 2885.2Part 2:Welding 2885.3Part 3:Operation and Maintenance 2885.4Part 4:Submarine pipelines 2885.5Part 5Field Pressure Testing Theterms'normative'and'informative'havebeenusedinthisStandardtodefinethe applicationoftheappendixtowhichtheyapply.A'normative'appendixisanintegralpart of a Standard, whereas an 'informative' appendix is only for information and guidance. Statementsexpressedinmandatorytermsinnotestotablesandfiguresaredeemedtobe requirements of the Standard. ThiscomprehensiverevisionistheresultofextensiveworkbysubcommitteeME-038-1in responsetoarequestfromtheindustrythatitconsiderincreasingthedesignfactorfrom 0.72to0.80.Thisrequestpromptedadetailedreviewofeachsectionandeachclauseof theStandard,resultinginthepreparationofsome70IssuePapersthatconsideredthe underlyingtechnicalissues(inrelationtoanincreaseddesignfactor)andrecommended changestotheStandard.Theseissuepapersweredebatedwithinthesubcommitteeand publishedontheIndustrywebsitetoallowconsiderationbytheIndustry.Theresultsof these deliberations form the basis of this revision.The revision also reflects the results of a significantandongoingindustryfundedresearchprogramundertakenbytheAustralian PipelineIndustryAssociationanditsresearchcontractors,andthroughitsassociationwith the Pipeline Research Council International and the European Pipeline Research Group. This revision provides a basis for Industry to benefit through the application of an increased factorforpressuredesign(fornewpipelines)andastructuredbasisforincreasingthe MAOPofaqualifyingexistingpipeline.Thesebenefitsaresupportedbyrobust requirements for safety, structural design, construction, testing and record keeping. Significant changes in this Revision include: 1)ArestructureofthesectionsofthedocumenttoseparatePipelineGeneral, Pipeline, Stations, and Instrumentation and Control. DRAFT ONLY3DRAFT ONLY DR04561.doc2)TheseparationofinformationcommontoParts1,23and5oftheStandardtoa newpart(Part0),includingtherequirementsforaholisticapproachtopipeline and environmental safety, and including definitions that apply to the Standard. 3)Theincorporationofasectiondefiningtheminimumrequirementsforapipeline whose maximum allowable operating pressure is proposed to be raised. 4)Section2(Safety)isre-written,reflectingexperiencegainedinthesevenyears since it was revised to provide a mandatory requirement for risk assessment.This revision (2005) provides more explicit guidance on obligation to undertake safety assessments with the integrity required for compliance with this Standard. 5)Section3(Materials)isrevisedtobetteraddressthetreatmentofmaterialsused inpipelines.Itincludesarequirementtode-ratethespecifiedminimumyield stress of pipe designed for operation at temperatures of 65C and higher.The use of fibreglass and corrosion resistant alloy pipe materials for pipelines constructed to this Standard is permitted and limited, in this Section. 6)Section 4 (Pipeline General) contains most of the material in the Pipeline General section of the 1997 revision.The Section has been expanded to include: i.A mandatory requirement for the design of a pipeline for the existing and intended land use. ii.Arevisionoftherequirementsforeffectivepipelinemarking includinga changetorequirethemarkersigntocomplywithaDangersignin accordance with AS 1319. iii.A Plan for Isolation of a Pipeline. iv.Specialrequirementsforpipelinesconstructedinlocationswherethe consequenceoffailurebyruptureisnotacceptable.Provisionsfor compliance with these requirements for pipelines constructed to this, or to anearlierrevisionoftheStandardinlandwherethelocation classification has changed to residential (or equal) is included. v.Thelocationclassificationdefinitionsarerevisedandadditionalsub-classes are defined. vi.Thehydrostaticstrengthtestpressureisre-definedtoaddressthe situationwherethepipewallthicknessexceedsthepressuredesign thickness, including corrosion allowance). vii.Provisions for low temperature excursions. viii. Calculationmethodsforcriticaldefectlength,energyreleaserateand radiation contour 7)The requirements for Fracture Control have been extensively revised to clarify the requirementsand to reflect experiencegained since 1997. Emphasis is placedon the use of the Battelle Two Curve model given the fact that most gas pipelines in Australia transport rich gas. 8)Section5(Pipeline)hasbeenrevisedtoincorporatethoseprovisionsspecificto pipeline in the 1997 revision.Significant changes in this section include: i.Thepipewallthicknessisnowrequiredtobethegreaterofthepressure design thickness, and the thickness required for each other identified load condition. ii.An equation for calculating the thickness required for external pressure is provided. DRAFT ONLY4DRAFT ONLY DR04561.dociii.Recognisingtheresultofacomprehensiveinvestigationofitspurpose and the impact of a change, the design factor has been changed from 0.72 to0.80,andthedesignfactorforpipelineassembliesandpipelineson bridges has been changed from 0.60 to 0.67. iv.A mandatory calculation method for determining resistance to penetration by excavator is provided. v.RequirementsforStressandStrainarecompletelyre-writtentoclarify therequirements.Thelim