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Ductile Cast Iron Standard Square Manhole Covers

Product Features:

Ductile Iron Standard Square Manhole Covers,Manhole Covers,Manhole Covers

Ductileironstandardsquaremanholecoversaresquare-shapedcoverscastfromductileiron(QT500-7),specificallydesignedforsquareopeningsinapplicationssuchascabletrenches,watermeterchambers,andsuburbandrainagesystems.Theirsquaregeometryandreinforcedribbingoptimizeload-bearingcapacityandinstallationcompatibility,makingthemidealforlow-to-mediumloadscenarios.

Withadvantagesincludingultra-highstrength,adaptability,andanti-theftsecurity,ductileironsquarecoversarethepreferredsolutionforlineardrainagesystemsandnon-circularopenings.Theirsquaredesignseamlesslyintegrateswithmodernurbanutilitytunnels,industrialtrenches,andothernon-circularinfrastructure,balancingfunctionalityandcost-effectiveness.Keyselectioncriteriaincludenodularityrate(≥85%),anticorrosiontreatments(zinc-basedalloycoatingpreferred),andlockingmechanisms.ManufacturerscertifiedunderGB/T19426-2018(e.g.,XinxingCastPipeCo.,Ltd.,HebeiJianzhiGroup)arerecommended.Comparedtocircularcovers,theyoffersuperioradaptabilityandinstallationefficiency,servingasfoundationalcomponentsforsmartcitiesandIndustry4.0infrastructure.

Tags:

Ductile Iron Standard Manhole Covers Square Manhole Covers
Product Description

Ductile Iron Standard Square Manhole Covers - Strength, Durability, and Eco-Friendly Design

ManufacturingProcess&StructuralDesign

Material&Process

  • MaterialProperties:Ductileironundergoesmagnesium/rare-earthnodularization,creatingsphericalgraphitedistributionforexceptionalstrength(tensilestrength≥420MPa)andtoughness(elongation≥10%),farexceedinggraycastiron.
  • CastingProcess:Producedviaresinsandcastingorlost-foammethods,withsurfaceanticorrosiontreatments(zincspraying,epoxy,orasphalt)todelayrusting(servicelife≥30years).
  • StandardCompliance:MeetsEN124,GB/T23858,andotherinternational/nationalstandards,withloadclassesspanningC250(25tons)toE600(60tons).

StructuralDesign

  • SquareGeometry:Matchessquareopeningsortrenches,integrateswithlineardrainagesystems,minimizesinstallationgaps,andreducesdebrisentrapmentrisks.
  • Anti-DisplacementDesign:Multi-pointlocks(e.g.,cornerbolts)orhingeconnectionspreventshiftingortheft.
  • Anti-SlipSurface:Diamond-patternedorgroovedtextureensuresfrictioncoefficient≥0.6,excellinginwet/snowyconditions.
  • ModularSplicing:Supportsmulti-panelconfigurationsforlarge-spantrenches(e.g.,2m×1mcombinations).

3.FunctionalCustomization

  • Markings:Customizableengravings(e.g.,"Gas,""Telecom"),areacodes,andloadratingsformaintenancemanagement.
  • NoiseReduction:Rubbergasketsornylonbuffersreducevehiclenoiseby10-15dB.

CoreAdvantages

1.Ultra-HighLoad&ImpactResistance

  • Compressivestrengthof400-600MPasupportsheavytrucksandmachinery(e.g.,E600-grade60-toncapacity),idealforportsandlogisticshubs.
  • PassesEN124drop-weighttestswithzerofracturing;impactresistanceexceedscompositesby3x.

2.Durability&CostEfficiency

  • Wearresistance3xhigherthanmildsteel;30+yearlifespanwithlowerlifecyclecostsvs.composites(nofrequentreplacements).
  • Minimalmaintenance(periodicanticorrosionrecoatingonly).

3.Anti-Theft&Safety

  • -Specializedtoolsrequiredforcornerlocks/hinges,reducingtheftby85%vs.grayiron.
  • -High-densitymaterial(7.3g/cm³)lacksscrapvalue,eliminatingtheftincentives.

4.EnvironmentalAdaptability

  • Temperaturerange:-40°Cto350°C;resistanttofreeze-thawcyclesandextremeclimates.
  • Anticorrosioncoatings(e.g.,zincalloy+polyurethane)withstandsoilpH5-10.

5.InstallationFlexibility

  • Squaredesignfitslineartrenches/cableducts,eliminatingretrofittingneeds.
  • Standardsizes(e.g.,500×500mm,600×600mm)compatiblewithexistingsquareframes.

Applications

1.Municipal&Transportation

  • Squaredrainagecovers(C250-grade)forsidewalks/non-motorizedlanes.
  • Highwayserviceareas/tunnelaccesspointswithfatigue-resistantdynamicloadcapacity.

2.Industrial&Energy

  • Heavy-dutyzones(E600-grade)inchemical/steelplantsforundergroundpipelineprotection.
  • Squareinspectioncoversforpower/telecomcabletrenches.

3.Commercial&PublicSpaces

  • Recesseddrainagecoverswithstone-liketexturesforplazas/subwaystations.
  • Retrofitsolutionsforagingcommunitysquareopenings,replacingfragileconcretecovers.

4.HarshEnvironments

  • Heat-resistantcoversforsteampipelineinspectionpitsinindustrialplants.
  • Coastalareaswithzinccoatingstoresistchloridecorrosion.

IV.Certifications&Standards

  • International:EN124(EUloadclasses),ASTMA536(USmaterialstandard).
  • ChinaStandards:
  • GB/T23858-2009"ManholeCovers"
  • CJ/T511-2017"DuctileIronManholeCovers"
  • GB/T19426-2018"DuctileIronManholeCoversforRoadsandBridges"(load,anticorrosion,anti-slipspecifications).
  • Certifications:CEMarking(EU),ISO9001,SGSSaltSprayTest(ASTMB117).

Load-Bearing Grades & Applicable Zones:

Choose the appropriate load-bearing grade for your application:

  • Group 1 (Minimum Grade: A15): Green belts, sidewalks, pedestrian areas, and motor vehicle-free zones.
  • Group 2 (Minimum Grade: B125): Sidewalks, non-motorized lanes, car parks, underground parking areas.
  • Group 3 (Minimum Grade: C250): Residential areas, alleyways, light vehicle zones, and areas near curbs.
  • Group 4 (Minimum Grade: D400): Urban main roads, highways, and expressways.
  • Group 5 (Minimum Grade: E600): Freight terminals, ports, and airports.
  • Group 6 (Minimum Grade: F900): Airport runways and other high-load zones.

ProductSpecifications:

  • SizeRange:300×300mm–1000×1000mm
  • LoadClasses:B125–E600

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