Welcome to Jinlong Foundry Group, we are a reputable manufacturer of top quality cast iron products.

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square D400 ductile iron manhole cover


Quick details

· Shape: Square

· Material: Ductile Iron GJS500-7

· Duty Class: EN124 B125

· Frame Style: Bottom Flange

· Gasket Material: Neoprene

· Lock Material: SS304

· Coating: Black Bitumen

· Standard: EN124-2015

· Surface Pattern:Customized

· Surface text:Customized


1. Quality guarantee

• Chemical checking

• Mechanical testing after heat treatment

• Dimension inspected

2. Quality document

• Full Q.A document as per client request

3.Packing and Shipping

• Standard export package(carton/wooden case/pallet)

• Accept FOB,FAS,CNF,CIF door to door etc. or customer

designated shipping agent.


• Drawing: we can translate your original drawing, offer

best suggestion on design.

• Quality: we have full set quality control system to

guarantee the best quality.


•Inspect in house, all our products must be checked 3 times before packing

• Third party inspection available upon requirement

We supply square D400 ductile iron manhole cover

Established in 1993, located in Changsha China, we devoted ourselves to casting industry for many years,has been exporting to Europe and Australia since 2001.

We are expecting become your long team partner, OEM & OED is welcomed.

NameDuctile manhole cover
MaterialDuctile iron GGG50/7, gray iron
ShapeRound, square, rectangle
Size200mm-1200mm or as per customers’ drawing
SurfaceBituminous black
MoldingDISA Line, Hand Modelling
ProcessDrawing-mould making-raw casting-sand blasting-rough machining-surface treatment-product inspection
Advanced technology and equipmentsTensile strength: 500Mpa Yield stress: 320Mpa
Elongation rate: 7%
Hardness: HBS170-230
Load capacityB125 C250 D400 E600 F900
ToleranceMachining:+/-0.02mm, finish machining:0.002mm
ApplicationFootway, pedestrians, car parks, aircraft pavements
AdvantageLongevity corrosion resistance, excellent anti-pressure