Manhole
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This page explains how Manhole Cover is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A removable cover that provides access to underground utility systems while protecting them from debris and unauthorized entry.
Technical details and manufacturing context for Manhole Cover
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Nominal Diameter | 600–800 mm | Common sizes for pedestrian and light traffic areas.EN 124 |
| Load Class | A15–D400 kN | Select based on traffic: A15 for pedestrians, D400 for heavy vehicles.EN 124 |
| Material Grade | GG20–GG40 | Ductile iron (GGG50) for higher strength and impact resistance.DIN 1691 |
| Surface Coating | 60–80 μm | Hot-dip galvanized or bituminous coating for corrosion resistance.ISO 1461 |
| Tensile Strength | 200–400 MPa | Minimum for gray iron; ductile iron exceeds 400 MPa.ISO 185 |
| Hardness | 150–220 HB | Brinell hardness for gray iron; ductile iron 150–180 HB.ISO 6506 |
| Operating Temperature | -40–80 °C | Suitable for most climates; extreme cold may require special alloys. |
| Sealing Performance | 0.1–0.5 L/min | Water leakage rate under 15 kPa pressure.EN 124 |
| Skid Resistance | ≥45 SRT | Minimum slip resistance to prevent accidents in wet conditions.EN 124 |
| Weight | 30–120 kg | Depends on size and load class; heavier for higher classes. |
| Lifting Capacity | 250–400 kN | Maximum load for lifting and removal during maintenance.EN 124 |
| Corrosion Resistance | ≥500 h | Salt spray test duration for coating durability.ISO 9227 |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Up to 25 psi (typical vehicular load) |
| other spec: | Max load capacity: 40 tons (H-20 loading), Slurry concentration: Not applicable (non-flow component) |
| temperature: | -40°C to 80°C |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
11 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
Common materials include cast iron, ductile iron, steel, and composite materials. The choice depends on the required load class and environmental conditions.
Load classes range from A15 for pedestrian areas to D400 for heavy vehicle traffic, as per EN 124. The appropriate class depends on the installation location.
Check the manufacturer's documentation for compliance with standards such as EN 124, DIN 1691, ISO 1461, and others. Always confirm model-specific values with the supplier.
Regular inspection for damage, corrosion, and proper seating is recommended. Ensure the cover is securely in place and that any locking mechanisms function correctly.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
Compare manufacturer profiles with relevant product and process capability.