concrete pipe. here to stay....concrete pipe is strong, durable and easy to install — but that’s...
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CONCRETE PIPE. HERE TO STAY.
For long-term structural integrity
and value, rigid concrete pipe
sets the standard
DISCOVER THE CONCRETE PIPE ADVANTAGE
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SPECIFY THE RIGHT PIPE FOR YOUR PROJECTAll pipe systems are not the same. Therearesignificant
differences, including pipe material, installation procedures and
durability,tonameonlyafew.Everypipematerial—precast
concrete, corrugated steel, high-density polyethylene, ductile
ironandPVC—performsdifferentlyonthejob—andeach
hasuniquepropertiesthatitpaystounderstand.Choosethe
wrongpipeandyoucouldjeopardizetheentireproject.
AMERICAN CONCRETE PRESSURE PIPE ASSOCIATION | AMERICAN CONCRETE PIPE ASSOCIATION
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www.acppa.org | www.concrete-pipe.org
Rigid Concrete Pipe Outperforms All OthersNewpipematerialsmaycomeandgo…butnotconcrete.Precastconcretepipeand concrete pressure pipe have a long history — nearly 100 years — of proven performance.Nootherpipematerialcomescloseintermsofreliabilityanddurability,sodon’tbemisledbyclaimsaboutsupposedlysuperioralternatives.
Understand the Difference between Flexible and Rigid PipeOnebasicdifferencebetweenflexibleandrigidpipeisthelengthandweightofavailablepipesegments.However,themoreimportantdifferenceishoweachmaterialgainsitsstrengthandstability.Flexiblepipeisheavilydependentuponbeddingmaterialandconstructionprocedures,whichrequirestrictadherencetoinstallationspecifications.What’smore,overtime,moderatechangesinthesoilenvelopewillcompromisethestructuralintegrityofthepipe.
Incontrast,thestrengthandstabilityofrigidconcretepipeareengineeredandmanufactureddirectlyintotheproduct.Itsshort-andlong-termperformancedependsfarlessonbeddingmaterialandconstructionprocedures,makingitmuchmorecontractor-friendly.Moderatechangesinthesoilenvelopehavelittle to no effect on the structural integrity of the pipe; and since concrete pipe isheavierthanflexiblepipe,itisalsolesssusceptibletoflotation.
Concretepipeisstrong,durableandeasytoinstall—butthat’sonlythebeginningofitsadvantages.Justasimportantly,overthetotallife-cycleofaproject,itisbyfarthemostaffordablealternative.Flexiblepipemayseemcheaperatfirst,butwhenyouconsiderthecostofinstallationandadditionalmaintenanceitwilllikelyrequire,concretealmostalwaysemergesasthe most cost-effective choice.
Choose Concrete: Reliable, Durable, Cost-Effective Themoreyouknowaboutprecastconcretepipeandconcretepressure pipe,themoreyourealizetheyaretheobviouschoiceformostsanitary sewers,stormdrains,culvertsandwaterdistributionsystems.Foryour nextproject,specifytheperformancechampion:reliable,durableand cost-effective concrete pipe.
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3900 University Drive
Suite 110
Fairfax, VA 22030-2513
T 703.273.7227
F 703.273.7230
www.acppa.org
FAILURE T YPE MOST COMMON CAUSES IMPACTS & RESULTS
DEFLECTION — Vertical/horizontal change in pipe diameter
• Impropercompactionofbeddingmaterial• Unexpectedloadonpipe• Trenchwidthtoonarrow
• Unexpectedstressesinpipewall• Lossofhydraulicefficiency• Unevensettlementatsoilsurface/pooling• Reductioninflowcapacity
JOINT SEPARATION — Detachment or misalignment of pipe sections
• Shiftingoflightweightpipeduringbackfilling• Shiftingsoils• Differentialsettlement• Thermalcontraction&expansionofHDPEpipe
• Unexpectedstressesinpipewall• Migrationofbeddingmaterial• Lossofpipesupport• Unevensettlementatsoilsurface/pooling
CORRUGATION GROWTH—Longitudinalelongationofinternalpipewall
• Soilpressureonpipecorrugations• Thinpipewall
• Lossofhydraulicefficiency• Reductioninflowcapacity
CRACKS, RIPS & TEARS—Fissuresinpipewall • Poormanufacturing• Poorresinquality• Improperinstallation
• Weakenedpipe• Lossofhydraulicefficiency• Reductioninflowcapacity
INFILTRATION & EXFILTRATION—Movementof fluid or solids into/out of pipe system
• Improperlysealedjoint,serviceconnectionorcrackedpipe
• Differentialdeflectionofpipeatjoint
• Migrationofbeddingmaterial• Lossofpipesupport
BUCKLING & CRACKING—Bends,warpsorbulgesinpipewall
• Inabilityofpipetocarrydesignload• Impropercompactionofbeddingmaterial• Poorresinquality• Excessiveloadonpipe
• UnexpectedstressesinHDPEpipewall• Lossofhydraulicefficiency• Migrationofbeddingmaterial• Reductioninflowcapacity• Lossofpipesupport
CORROSION—Lossofpipematerialdue to oxidation
• Prolongedexposureofsteelpipeto water&oxygen
• Reductioninpipewallthicknessinwaterwayareas
• Lossofpipestrength
DELAMINATION — Separation of interior liner fromexternalcorrugatedpipewall
• Poormanufacturing• Poorresinquality• Excessiveloadonpipe• Inabilityofpipetocarrydesignload
• Unexpectedstressesinpipewall• Lossofhydraulicefficiency• Reductioninflowcapacity• Increasedcorrosionformetallicpipe
Why Flexible Pipe Systems Fail … And What Happens When They Do
Flexiblepipesystemshaveatendencytofailinavarietyofways,eachwithitsowncharacteristiccausesandresults.Ineverycase,theseproblemscouldbeavoidedbyselectingrigidconcretepipesystemsinstead.
Tolearnmoreabouttheadvantagesofprecastconcretepipeandconcretepressurepipe,contactthestaffatACPPAorACPA.Youcanalsovisit www.acppa.org and www.concrete-pipe.orgtodownloaddesignsoftware,reference manuals and other technical information.
DISCOVER THE CONCRETE PIPE ADVANTAGE
AmericanConcretePipeAssociation
1303W.WalnutHillLane,Suite305
Irving,TX75038-2965
T 972.506.7216
F 972.506.7682
www.concrete-pipe.org