port manhole cover.
• Shape: Round
• Material: Ductile Iron GJS500-7
• Duty Class: EN124 D400
• Frame Style: Bottom Flange
• Gasket Material: Neoprene
• Lock Material: SS304
• Coating: Black Bitumen
• Standard: EN124-2015
• Surface Pattern:Customized
• Surface text:Customized
We provide durable and heavy-duty manhole covers specifically designed for ports, docks, and marine environments. Made from high-strength ductile iron, our port manhole covers offer excellent corrosion resistance, high load-bearing capacity, and long-lasting performance under harsh conditions. Ideal for cargo terminals, shipyards, and waterfront infrastructure, our covers comply with international safety and quality standards. Available in various sizes and custom designs to meet port-specific requirements. Contact us for more details and bulk orders.
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.
Details
|
Name |
Ductile manhole cover |
|
Material |
Ductile iron GGG50/7, gray iron |
|
Standard |
EN124/1433/1563 |
|
Class |
A15,B125,C250,D400,E600,F900 |
|
Shape |
Round, square, rectangle |
|
Size |
200mm-1000mm or as per customers’ drawing |
|
Surface |
Bituminous black |
|
Molding |
DISA Line |
|
Process |
Drawing-mould making-raw casting-sand blasting-rough machining-surface treatment-product inspection |
|
Advanced technology and equipments |
Tensile strength: 500Mpa Yield stress: 320Mpa |
|
Load capacity |
B1125 C250 D400 E600 F900 |
|
Tolerance |
Machining:+/-0.02mm, finish machining:0.002mm |
|
Application |
Footway, pedestrians, car parks, aircraft pavements |
|
Advantage |
Longevity corrosion resistance, excellent anti-pressure |
FAQ
- Why are most manhole covers round?
Manhole covers are round because a round cover cannot fall through its circular opening. The manhole cover rests on the frame seat; therefore, the diameter of the frame opening is smaller than the manhole cover. Whereas a square or rectangular manhole cover may fall through an opening if turned diagonally in the hole. It is also easier to dig a circular hole. Round covers are easier to machine on a lathe. A round manhole cover can be rolled, which makes it easier to move if needed.
- Why ductile iron?
Spheroid Graphite' or 'Ductile Iron' is a unique form of Iron. which prior to the metal casting process receives crucial mineral additives to produce an exceptionally strong resistance and durable metal, the molecular structure of 'Ductile Iron' gives rise to excellent additional strength and shock load resistance, within structure carbon steel, without steel inheriting corrosion. In today's roads, Covers & Gratings are required to carry increasingly heavy and fast moving traffic, yet the need to keep the roads in service, places free from accidents and theft, additional demands on those Covers and Gratings in terms of speed and ease of access for maintenance of services is essential. 'Ductile Iron' Manhole Covers, Gratings and Frames are fast replacing the conventional 'Grey Iron Manhole Covers, Gratings and Frames on account of uniqueness in its Strength to Weight ratio, Design, Weight and the Cost benefit.
Quality Control Process
Raw Material Inspection
- Raw Material inspection including chemical
- components analysis, tensile strength test and etc.
Quality Control Groups
- Dimensions Test
- Manufacture process Inspection
- Process Inspection including sand cleaning, assembling, packing and coating
- Final Inspection including delivery marks and etc.
- Particular Tests for different products, such as Load Test, Hydro Test and etc.
Laboratory
- Chemical Components
- Microstructure Test
- Tensile Strength
Our Certificates
