General Information

Abstract

This document specifies requirements for industrial piping either totally buried or partly buried and partly run in sleeves or similar protection. It is used in conjunction with the other six parts of EN 13480.
Where buried piping subject to this standard connects to piping installed under other jurisdiction such as pipelines, the transition should be made at a closing element e.g. an isolating or regulating valve separating the two sections. This should be close to the boundary of the industrial site, but may be inside or outside the boundary.
Operating temperature up to 75 °C.
NOTE   For higher temperatures reference should be made to EN 13941+A1:2010, but it should be kept in mind, that CEN/TC 107 only deals with pre-insulated piping with temperatures up to 140 °C and diameters up to 800 mm, which is state of the art for these products.

Status
Withdrawn
Publication Date
27-Jun-2017
Withdrawal Date
22-Sep-2026
ICS
23.040.01 - Pipeline components and pipelines in general
Technical Committee
CEN/TC 267 - Industrial piping and pipelines
Drafting Committee
CEN/TC 267/WG 8 - Maintenance of EN 13480 series
Current Stage
9960 - Withdrawal effective - Withdrawal
Start Date
24-Jul-2024
Completion Date
23-Sep-2026
Directive
Harmonized Standard2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
OJ Ref: C, C 389 OJ Date: 17-Nov-2017
Mandate
M/071 - Mandate to CEN for standardization in the field of Pressure equipment
Ref Project
SIST EN 13480-6:2018 - Metallic industrial piping - Part 6: Additional requirements for buried piping

Buy Documents

Relations

Replaces
EN 13480-6:2012 - Metallic industrial piping - Part 6: Additional requirements for buried piping
Effective Date
08-Jun-2022
Replaces
EN 13480-6:2012/A1:2016 - Metallic industrial piping - Part 6: Additional requirements for buried piping
Effective Date
15-Feb-2017
Replaced By
EN 13480-6:2024 - Metallic industrial piping - Part 6: Additional requirements for buried piping
Effective Date
11-May-2022
Refers
EN 13480-3:2017 - Metallic industrial piping - Part 3: Design and calculation
Effective Date
28-Jan-2026
Refers
EN 13480-2:2017 - Metallic industrial piping - Part 2: Materials
Effective Date
28-Jan-2026
Referred By
EN 13480-1:2017 - Metallic industrial piping - Part 1: General
Effective Date
28-Jan-2026
Referred By
EN 15001-1:2023 - Gas Infrastructure - Gas installation pipework with an operating pressure greater than 0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations - Part 1: Detailed functional requirements for design, materials, construction, inspection and testing
Effective Date
28-Jan-2026
Referred By
EN 13480-5:2017 - Metallic industrial piping - Part 5: Inspection and testing
Effective Date
28-Jan-2026
Amended By
EN 13480-6:2017/A1:2019 - Metallic industrial piping - Part 6: Additional requirements for buried piping
Effective Date
06-Dec-2017

Buy Documents

Get Certified

Connect with accredited certification bodies for this standard

Institut za varilstvo d.o.o. (Welding Institute)

Slovenia's leading welding institute since 1952. ISO 3834, EN 1090, pressure equipment certification, NDT personnel, welder qualification. Only IIW Au

SA Slovenia Verified
Visit Website

Sponsored listings

Frequently Asked Questions

EN 13480-6:2017 is a standard published by the European Committee for Standardization (CEN). Its full title is "Metallic industrial piping - Part 6: Additional requirements for buried piping". This standard covers: This document specifies requirements for industrial piping either totally buried or partly buried and partly run in sleeves or similar protection. It is used in conjunction with the other six parts of EN 13480. Where buried piping subject to this standard connects to piping installed under other jurisdiction such as pipelines, the transition should be made at a closing element e.g. an isolating or regulating valve separating the two sections. This should be close to the boundary of the industrial site, but may be inside or outside the boundary. Operating temperature up to 75 °C. NOTE For higher temperatures reference should be made to EN 13941+A1:2010, but it should be kept in mind, that CEN/TC 107 only deals with pre-insulated piping with temperatures up to 140 °C and diameters up to 800 mm, which is state of the art for these products.

This document specifies requirements for industrial piping either totally buried or partly buried and partly run in sleeves or similar protection. It is used in conjunction with the other six parts of EN 13480. Where buried piping subject to this standard connects to piping installed under other jurisdiction such as pipelines, the transition should be made at a closing element e.g. an isolating or regulating valve separating the two sections. This should be close to the boundary of the industrial site, but may be inside or outside the boundary. Operating temperature up to 75 °C. NOTE For higher temperatures reference should be made to EN 13941+A1:2010, but it should be kept in mind, that CEN/TC 107 only deals with pre-insulated piping with temperatures up to 140 °C and diameters up to 800 mm, which is state of the art for these products.

EN 13480-6:2017 is classified under the following ICS (International Classification for Standards) categories: 23.040.01 - Pipeline components and pipelines in general. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 13480-6:2017 has the following relationships with other standards: It is inter standard links to EN 13480-6:2012, EN 13480-6:2012/A1:2016, EN 13480-6:2024, EN 13480-3:2017, EN 13480-2:2017, EN 13480-1:2017, EN 15001-1:2023, EN 13480-5:2017, EN 13480-6:2017/A1:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 13480-6:2017 is associated with the following European legislation: EU Directives/Regulations: 2014/68/EU; Standardization Mandates: M/071. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

EN 13480-6:2017 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kovinski industrijski cevovodi - 6. del: Dodatne zahteve za vkopane cevovodeMetallische industrielle Rohrleitungen - Teil 6: Zusätzliche Anforderungen an erdgedeckte RohrleitungenTuyauteries industrielles métalliques - Partie 6: Exigences complémentaires relatives aux tuyauteries enterréesMetallic industrial piping - Part 6: Additional requirements for buried piping77.140.75Jeklene cevi in cevni profili za posebne nameneSteel pipes and tubes for specific use23.040.10Železne in jeklene ceviIron and steel pipesICS:Ta slovenski standard je istoveten z:EN 13480-6:2017SIST EN 13480-6:2018en,fr,de01-januar-2018SIST EN 13480-6:2018SLOVENSKI
STANDARDSIST EN 13480-6:2012/A1:2017SIST EN 13480-6:20121DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13480-6
June
t r s y ICS
t uä r v rä r s Supersedes EN
s u v z ræ xã t r s tEnglish Version
Metallic industrial piping æ Part
xã Additional requirements for buried piping Tuyauteries industrielles métalliques æ Partie
x ã Exigences complémentaires pour les tuyauteries enterrées
Metallische industrielle Rohrleitungen æ Teil
xã Zusätzliche Anforderungen an erdgedeckte Rohrleitungen This European Standard was approved by CEN on
t s June
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s u v z ræ xã t r s y ESIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)2ContentsFPageFEuropeanforeword.3 1Scope.5 2Normativereferences.5 3General.5 3.1Safety.5 3.2Routes.6 3.3Depthofinstallation.6 3.4Pipesmarkingandrecording.6 3.5Internalinspectionprovisions.6 3.6Contentsremoval.7 3.7Trenchdrainage.7 4Materials.7 5Designandcalculation.7 5.1Minimumwallthicknessforburiedpiping.7 5.2Design.8 6Installation.9 6.1Trenches.9 6.2Pipelaying.9 6.3Backfilling.10 7Sleevesorcasings.10 8Corrosionprotection.10 8.1General.10 8.2Coatings.11 8.3Cathodicprotection.11 9Examinationandtesting.11 AnnexA(normative)Calculationsforburiedpiping.12 A.1General.12 A.2Materials.12 A.3Designandcalculation.12 AnnexY(informative)HistoryofEN13480æ6.35 Y.1DifferencesbetweenEN13480æ6:2012andEN13480æ6:2017.35 AnnexZA(informative)RelationshipbetweenthisEuropeanStandardandtheEssentialRequirementsofEUDirective2014/68/EUaimedtobecovered.36 Bibliography.37 FFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)3EuropeanforewordpipingFandFpipelinesóáFtheFsecretariatFofFwhichFisFheldFbyFAFNORäFThisFEuropeanFStandardFshallFbeFgivenFtheFstatusFofFaFnationalFstandardáFeitherFbyFpublicationFofFanFidenticalFtextForFbyFendorsementáFatFtheFlatestFbyFDecemberFFtFrFsFyáFandFconflictingFnationalFstandardsFshallFbeFwithdrawnFatFtheFlatestFbyFDecemberFFtFrFsFyäFAttentionFisFdrawnFtoFtheFpossibilityFthatFsomeFofFtheFelementsFofFthisFdocumentFmayFbeFtheFsubjectFofFleFforFidentifyingFanyForFallFsuchFpatentFrightsäFThisFdocumentFhasFbeenFpreparedFunderFaFmandateFgivenFtoFCENFbyFtheFEuropeanFCommissionFandFtheFEuropeanFFreeFTradeFAssociationáFandFsupportsFessentialFrequireForFrelationshipFwithFEUFDirectiáFwhichFisFanFintegralFpartFofFthisFdocumentäFThisFEuropeanFStandardFENFFsFuFvFzFrFforFmetallicFindustrialFpipingFconsistsFofFeightFinterdependentFandFnotFdissociableFPartsFwhichFareãF Part1:General; Part2:Materials; Part3:Designandcalculation; Part4:Fabricationandinstallation; Part5:Inspectionandtesting; Part6:Additionalrequirementsforburiedpiping; CEN/TR13480æ7,Guidanceontheuseofconformityassessmentprocedures; Part8:Additionalrequirementsforaluminiumandaluminiumalloypiping.AlthoughFtheseFPartsFmayFbeFobtainedFseparatelyáFitFshouldFbeFrecognisedFthatFtheFPartsFareFinterædependantäFAsFsuchFtheFmanufactureFofFmetallicFindustrialFpipingFrequiresFtheFapplicationFofFallFtheFrelevantFPartsFinForderFforFtheFrequirementsFofFtheFStandardFtoFbeFsatisfactorilyFfulfilledäFThisFEuropeanFStandardFwillFbeFmaintainedFbyFaFMaintenanceFMHDFworkingFgroupFwhoseFscopeFofFworkingFisFlimitedFtoFcorrectionsFandFinterpretationsFrelatedFtoFENFFsFuFvFzFräFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)4submittingFquestionsFcanFbeFdownloadedFfromFtheFlinkFtoFtheFMHDFwebsiteäFAfterFsubjectFexpertsFhaveFagreedFanFansweráFtheFanswerFwillFbeFcommunicatedFtoFtheFquestioneräFCorrectedFpagesFwillFbeFgivenFspecificFissueFnumberFandFissuedFbyFCENFaccordingFtoFCENFRulesäFInterpretationFsheetsFwillFbeFpostedFonFtheFwebsiteFofFtheFMHDäFThisFdocumentFsupersedesFENFFsFuFvFzFræFxãFtFrFsFtäFThisFnewFeditionFincorporatesFtheFAmendmentsFwhichFhaveFbeenFapprovedFpreviouslyFbyFCENFmembersáFandFtheFcorrectedFpagesFupFtoFIssueFFvFwithoutFanyFfurtherFtechnicalFchangeäFAnnexFYFprovidesFdetailsFofFsignificantFtechnicalFchangesFbetweenFthisFEuropeanFStandardFandFtheFpreviousFeditionäFAmendmentsFtoFthisFnewFeditionFmayFbeFissuedFfromFtimeFtoFtimeFandFthenFusedFimmediatelyFasFalternativesFtoFrulesFcontainedFhereinäFAccordingFtoFtheFCENæCENELECFInternalFRegulationsáFtheFnationalFstandardsForganizationsFofFtheFfollowingFcountriesFareFboundFtoFimplementFthisFEuropeanFStandardãFAustriaáFBelgiumáFBulgariaáFCroatiaáFCyprusáFCzechFRepublicáFDenmarkáFEstoniaáFFinlandáFFormerFYugoslavFRepublicFofFMacedoniaáFFranceáFGermanyáFGreeceáFHungaryáFIcelandáFIrelandáFItalyáFLatviaáFLithuaniaáFLuxembourgáFMaltaáFNetherlandsáFNorwayáFPolandáFPortugaláFRomaniaáFSerbiaáFSlovakiaáFSloveniaáFSpaináFSwedenáFSwitzerlandáFTurkeyFandFtheFUnitedFKingdomäFFFFFFFFFFFFFFFFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)51 ScopeThisFdocumentFspecifiesFrequirementsFforFindustrialFpipingFeitherFtotallyFburiedForFpartlyFburiedFandFpartlyFrunFinFsleevesForFsimilarFprotectionäFItFisFusedFinFconjunctionFwithFtheFotherFsixFpartsFofFENFFsFuFvFzFräFWhereFburiedFpipingFsubjectFtoFthisFstandardFconnectsFtoFpipingFinstalledFunderFotherFjurisdictionFsuchFasFpipelinesáFtheFtransitionFshouldFbeFmadeFatFaFclosingFelementFeägäFanFisolatingForFregulatingFvalveFseparatingFtheFtwoFsectionsäFThisFshouldFbeFcloseFtoFtheFboundaryFofFtheFindustrialFsiteáFbutFmayFbeFinsideForFoutsideFtheFboundaryäFOperatingFtemperatureFupFtoFFyFwFF¹CäFNOTEFForFhigherFtemperaturesFreferenceFshouldFbeFmadeFtoFENFFsFuF{FvFsFªAFsãFtFrFsFráFbutFitFshouldFbeFkeptFinFFtemperaturesFupFtoFFsFvFrFF¹CFandFdiametersFupFtoFFzFrFrFmmáFwhichFisFstateFofFtheFartFforFtheseFproductsäF2 NormativereferencesTheFfollowingFdocumentsáFinFwholeForFinFpartáFareFnormativelyFreferencedFinFthisFdocumentFandFareFindispensableFforFitsFapplicationäFForFdatedFreferencesáFonlyFtheFeditionFcitedFappliesäFForFundatedFreferencesáFtheFlatestENFFsFuFvFzFræFsãFtFrFsFyáFMetallicindustrialpiping—Part1:GeneralFENFFsFuFvFzFræFtãFtFrFsFyáFMetallicindustrialpiping—Part2:MaterialsFENFFsFuFvFzFræFuãFtFrFsFyáFMetallicindustrialpiping—Part3:DesignandcalculationFENFFsFuFvFzFræFwãFtFrFsFyáFMetallicindustrialpiping—Part5:Inspectionandtesting3 General3.1 Safety BuriedFpipingFwithinFanFindustrialFsiteFpresentsFaFpotentialFhazardFtoFsiteFpersonaláFequipmentFandFenvironmentäFTheFsectionsFsetFoutFinFthisFdocumentFprovideFguidanceFasFtoFhowFtheFhazardFpresentedFbyFtheFpipingFmayFbeFassessedáFandFtheFintegrityFofFtheFpipingFsystemFmaintainedäFNOTEFFsFAttentionFisFdrawnFtoFappropriateFNationalForFLocalFregulationsäF TheFmainFfactorsFtoFbeFconsideredFareãF DesignFincludingFRoutingáFLayoutáFInteractionFwithFconnectingFsystemsâF MaterialsFandFConstructionFSpecificationFandFQualityFControlâF OperatingFProceduresFandFControlâFFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)6 CorrosionFprotectionâF ExternalFImpactFProtectionFandFMitigationäFAllFofFtheseFfactorsFinteractäFNOTEFFtFItFisFrecommendedFthatFallFburiedFpipingFbeFsubjectedFtoFaFformalFhazardFanalysisFprocedureäFNOTEFFuFAttentionFisFdrawnFtoFappropriateFNationalForFLocalFregulationsäF AdditionalFsafetyFrequirementsFmayFbeFspecifiedFforFgroupFFsFfluidsFaccordingFtoFENFFsFuFvFzFræFsãFtFrFsFyáFincludingFautomatedFmeansFofFisolatingFburiedFsectionsFofFpipingäF3.2 RoutesAllFroutesFforFburiedFpipingFshallFbeFagreedFwithFtheFownerFandFoperatorFofFtheFsiteäFTheFsiteFownerFshallFbeFrequiredFtoFfurnishFdetailsFofFallFotherFactualForFplannedFbroadwaysForFotherFsurfaceFloadsFwithinFtheFconstructionFworkingFwidthForFzoneFofFtheFproposedFpipeäFPipingFinFcategoryFIIIFaccordingFtoFENFFsFuFvFzFræFsãFtFrFsFyFshallFbeFseparatedFfromFanyFotherFpipeForFserviceFbyFaFminimumFdistanceFofFFráFtFwFmFunlessFitFcanFbeFdemonstratedFthatFaFsmallerFdistanceFisFacceptableäF3.3 DepthofinstallationedFpipingFshallFbeFprovidedFwithFaFminimumFcoverFofFFráFzFmäFTheFdesignerFshallFconsiderFincreasingFtheFextentFofFcoverFaboveFtheFminimumFwhereFpenetratingFcoldForFfrostFheaveFofFtheFgroundFisFlikelyáForFwhereFdamageFfromFexcavationFactivitiesFisFaFpossibilityäF3.4 PipesmarkingandrecordingBuriedFpipesFshallFbeFmarkedFbyFaFcontinuousFtapeForFotherFagreedFmeansFplacedFdirectlyFaboveFtheFpipeFandFnoFcloserFthanFFráFuFmäFAllFburiedFpipesFshallFbeFidentifiedFonFasæinstalledFdrawingsFwhichFaccuratelyFlocateFtheFrouteFrelativeFtoFstructuresForFotherFpermanentFfeaturesäFTheFsiteFownerFmayFrequireFtheFrouteFtoFbeFphysicallyFmarkedFbyFtheFuseFofFidentificationFpostsForFcoverFslabsFatFappropriateFintervalsäF3.5 InternalinspectionprovisionsWhereFperiodicFinternalFinspectionFofFburiedFpipingFisFanticipatedáFandFtheFspecificationFidentifiesFtheFmethodFproposedáFtheFdesignerFshallFincorporateFappropriateFmeansFofFintroducingFandFremovingFtheFinspectionFdevicesäFSuchFclosuresáFandFopeningsFforFinspectionFshallFbeFdesignedFinFaccordanceFwithFFENFFsFuFvFzFræFuãFtFrFsFyäFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)73.6 ContentsremovalTheFdesignFofFtheFpipingFsystemFshallFmakeFallowanceFforFtheFsafeFfillingFandFremovalFofFtheFcontentsäFThisFshallFincludeFventFandFdrainFpointsForFfallsFasFrequiredáFandFtheFselectionFofFappropriateFbendsFandFfittingsäF3.7 TrenchdrainageTheFdesignerFshallFrecognizeFthatFpipeFtrenchesFforFburiedFpipingFcanFactFasFchannelsFforFgroundFwateräFAppropriateFmeansFshallFbeFemployedFtoFensureFthatFtheFbottomFofFtheFtrenchFhasFsufficientFslopeFtoFsoakæawaysForFsumpsFtoFpreventFaccumulationFofFwaterFaroundFtheFpipingäFWhereFsuchFmeasuresFareFnotFpossibleáFtheFdesignerFshallFincludeFtheFpossibilityFofFflotationFinFtheFdesignFcalculationsäFInFadditionáFtheFdrainageFarrangementsFshallFdisposeFofFtheFhydrostaticFtestFwateräFCareFshallFbeFexercisedFduringFthisFoperationFtoFensureFthatFwashoutFofFbeddingFmaterialFdoesFnotFoccuräF4 MaterialsMaterialsFshallFconformFtoFtheFrequirementsFofFENFFsFuFvFzFræFtãFtFrFsFyFexceptFthatFtheFvalueFforFtheFspecifiedFminimumFelongationFafterFfractureFforFtheFlongitudinalFdirectioFtFrFF¨äFMaterialsFwithFelongationFvaluesFlessFthanFFtFrFF¨FshallFbeFavoidedáFandFshallFonlyFbeFusedFsubjectFtoFagreementFbetweenFtheFpurchaserFandFtheFdesigneräF5 Designandcalculation5.1 MinimumwallthicknessforburiedpipingUnlessFtheFpressureFdesignFcalculationsFleadFtoFaFgreaterFthicknessáFtheFwallFthicknessFofFtheFpipeFshallFnotFbeFlowerFthanFtheFvalueFgivenFinFTableFFsäFTable1—MinimumwallthicknessforburiedpipingNominalsize(DN)MinimumthicknessmmDNFFFzFrFFuáFtFFzFrFF´FDNFFFsFwFrFFváFyFFsFwFrFF´FDNFFFvFwFrFFxáFuFwFFvFwFrFF´FDNFFFxFrFrFFyáF{FFxFrFrFF´FDNFFF{FwFrFF{áFwFF{FwFrFF´FDNFFsFF¨FDNFFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)85.2 Design5.2.1AFsimpleFsingleFdimensionalFmodelFlinkingFburiedFpipesFandFtheFsurroundingFgroundFmayFbeFsufficientFforFpipingFdesignedFinFaccordanceFwithFENFFsFuFvFzFræFuãFtFrFsFyäFMoreFcomplexFanalysisFofFpipeFtoFsoilFinteractionFmayFbeFusedFwhereFsufficientFaccurateFgeoæmechanicalFdataFisFavailableáForFwhereFtheFconditionsFofFthisFannexFcannotFbeFmetäFNOTEFItFisFassumedFthatFtheFloadsFimposedFbyFtheFpipingFonFtheFsoilFdoFnotFexceedFitsFloadFbearingFcapacityäF5.2.2TheFdesignerFshallFincludeFinFtheFcalculationsFtheFweightFofFsoilForFbackfillFaboveFtheFpipeFandFtheFmaximumFpredictedFvalueFofFtrafficForFotherFstaticFandFdynamicFloadsFimposedFonFtheFgroundFaboveFtheFFmmFofFsandáForFsimilarFfreeæflowingFmaterialáFtheFforcesFmayFbeFconsideredFasFactingFoverFtheFentireFFsFzFrF¹FofFtheFupperFpipeFsurfaceäF5.2.3InFadditionFtoFcalculationsFatFtheFdesignFpressureáFtheFloadingsFonFtheFunpressurizedFsystemFshallFbeFcalculatedäF5.2.4PipeFmovementFwillFbeFsignificantlyFrestrainedFbyFtheFfrictionalFforceFatFtheFinterfaceFwithFtheFsurroundingFsoiláFandFmayFbeFeffectivelyFpreventedFatFburiedFbendsFandFlargeFbranchesäFUnlessFspecificFmeasuresFareFincorporatedFtoFpermitFrelativeFmovementáFburiedFpipesFshallFbeFconsideredFasFfullyFrestrainedFaxiallyFforFcalculationFpurposesäFTheFaxialFstressFdueFtoFcombinedFpressureFandFtemperatureFchangeFeffectsFshallFbeFcalculatedFasFfollowsãF)(TESSpLFwhereFSLFisFtheFlongitudinalFstressFFFráF{FrFxFyieldFstrengthFatFdesignFtemperatureâFSpFisFtheFcircumferentialFstressFdueFtoFpressureFaloneâFTisFtheFmaximumFtemperatureFrangeâFisFPoissonïsFratioäF5.2.5WhereFnoFdetailedFanalysisFisFundertakenáFtheFmaximumFtemperatungFfeaturesFsuchFasFburiedFbendsFandFteesFshallFhaveFaFseparationFofFnotFlessFthanFFwFDNäFWhereFdetailedFanalysisFisFundertakenáFitFshallFbeFinF5.2.6WhereFseismicFeventsFareFtoFbeFconsideredáFtheFpipeFshallFbeFtreatedFasFifFrigidlyFconnectedFtoFtheFgroundFandFfollowingFtheFimposedFdisplacementsäFDynamicFamplificationFmayFbeFignoredäFNOTEFTheFsurroundingFsoilFcanFbeFconsideredFtoFeffectivelyFdampenFallFharmonicFexcitationsFofFtheFpipeäFFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)95.2.7TheFdesignerFshallFconsiderFtheFinterfaceFbetweenFburiedFandFaboveFgroundFsectionsFofFtheFpipingFforFallFdesignFconditionsäFForFtheFstaticFanalysisáFtheFburiedFpartFshallFbeFconsideredFasFclampedFforFthermalFexpansionáFandFitFshallFbeFensuredFthatFtheFflexibilityFofFtheFaboveFgroundFpartFisFsufficientFinForderFtoFlimitFtheFloadsFatFtheFconnectionFofFtheFtwoFpartsFtoFacceptableFvaluesäFTheFdesignerFshallFanalyseFtheFeffectsFofFanyFanticipatedFsettlementFofFtheFburiedFpipingFrelativeFtoFtheFconnectedFpipingFovergroundForFinFductsáFandFshallFensureFcomplianceFwithFtheFrequirementsFofFthisFdocumentäFNOTEFWhenFgaseousFfluidsFareFcarriedFbyFtheFpipingáFtheFdesignerFshouldFnoteFtheFlikelyFriseFinFtemperatureFinFtheFdischargeFlinesFofFaFcompressorFandFcorrespondingFreductionFatFtheFoutflowFfromFpressureFreducingFequipmentäFWhereFsuchFinælineFitemsFareFcloseFtoFaFburiedFsectionáFtheFdesignerFshallFconsiderFtheFeffectsFofFtheFtemperatureFchangeäF6 Installation6.1 Trenches6.1.1TheFnormalFmethodFofFinstallationFshallFbeFbyFtheFexcavationFofFtrenchesäFAlternativelyáFsectionsFofFundergroundFpipeFinstalledFbyFthrustFboringForFsimilarFtrenchlessFmethodsFshallFbeFsetFinFcasingsäF6.1.2TheFbottomFofFtheFtrenchFshallFbeFconsolidatedFandFfreeFfromFsharpFobjectsáFrocksForFstonesäFTheFtrenchFshallFbeFmadeFwithFsufficientFslopeFtoFprovideFdrainageFforFtheFpipeFtoFminimiseFflotationFandFcorrosionäFWhereFnecessaryáFsoakæawaysForFsumpsFshallFbeFprovidedäFTheFpipingFshallFbeFlaidFonFanFevenFbedFofFsandForFsimilarFmaterialFandFconsequentlyFtheFlongitudinalFbendingFstressFdueFtoFweightFmayFbeFdiscountedäF6.1.3AFbeddingFbaseFofFfreeæflowingFmaterialFsuchFasFroundedFsandForFfineFgravelFshallFbeFprovidedFwithFsufficientFdepthFtoFsupportFtheFpipeFandFassistFdrainageäF6.2 Pipelaying6.2.1TheFtrenchFshallFbeFsubstantiallyFfreeFofFwaterFbeforeFtheFpipeFisFplacedFinFpositionäF6.2.2ProvisionFshallFbeFmadeFforFsufficientFaccessFtoFjointsFtoFpermitFproperFexaminationFduringFhydrostaticForFotherFtestingFoperationsáFandFtoFwrapForFotherwiseFprotectFpipeFjointsFinFtheFtrenchäFAdequateFmeansFshallFbeFprovidedFforFremovingFtheFhydrostaticFtestFwaterFfromFtheFpipeFandFtrenchäF6.2.3TheFboreFofFtheFpipingFshallFbeFcleanFtoFtheFrequiredFstandardFbeforeFlayingFinFtheFtrenchäF6.2.4AllFpracticalFmeansFshallFbeFtakenFtoFpreventFdamageFtoFtheFpipeFandFitsFcoatingsFinFstorageFandFduringFpipeFlayingäFWireFropesFandFchainsFshallFnotFbeFusedFforFliftingäFProtectiveFpipeFcoatingsFshallFbeFvisualFexaminedForFhighFvoltageFtestedFafterFtheFpipeFisFlaidFandFpriorFtoFbackFfillingFtheFexcavationäFFFSIST EN 13480-6:2018

EN13480æ6:2017(E)Issue1(2017æ06)106.3 Backfilling6.3.1AllFtieFandFexaminationFoperationsFshallFbeFcompletedFbeforeFbackfillingäF6.3.2TheFfirstFcoverFofFtheFpipingFshallFbeFmadeFusingFfreeæflowingFmaterialsFtoFaFminimumFdepthFofFFsFwFrFmmáFensuringFthatFtheFwholeFcircumferenceFofFtheFpipeFisFinFcontactFwithFtheFfillingäF6.3.3TheFremainingFbackfillingFshallFbeFtheFsameFmaterialFthatFwasFexcavatedFtoFformFtheFtrenchForFofFsimilarFcharacteristicsäFNoFvegetableForFwasteFmatterFshallFbeFinco
...