Horizontal Manhole Cover, also known as an access cover or trench cover plate, is a removable, sealable closure device installed on ground surfaces or over trenches in industrial, municipal, and construction applications. Its primary functions are to cover underground pipeline, cable, valve, or equipment access points, facilitating personnel entry and equipment maintenance. It also ensures ground levelness, safe passage for pedestrians and vehicles, and prevents debris and sewage from entering the underground space.

Product Parameters

Category	Specific Description
Material	Ductile Iron, Stainless Steel (304/316), Carbon Steel, Composite Materials (FRP)
Load-Bearing Class	Light Duty (A15) Medium Duty (B125) Heavy Duty (C250) Extra Heavy Duty (D400/E600/F900)
Size	Common Shapes: Round, Square, Rectangular; Standard Sizes: 500mm-800mm, or Custom Sizes
Surface Treatment	Hot-Dip Galvanizing, Anti-Slip Patterns (Checkered Plate, Serrated), Powder Coating, Epoxy Coating
Opening Method	Swing Open, Flip Open, Lift-Out, Slide-Open; Optional Anti-Theft Locks or Hinges
Sealing Performance	Rubber Gasket, Silicone Seal Ring; Provides Waterproof, Dustproof, and Odor-Containment
Operating Temp. Range	-30℃ to +150℃ (Varies based on material and sealing components)

Product Advantages

Excellent Sealing Performance: Utilizes EPDM rubber sealing strips with a compression set ≤ 20%, achieving IP67 rating for water and dust ingress protection.
Easy Maintenance and Access: Optimized weight design whth 600mm circular cover ≤ 45kg. Standard equipped with dedicated lifting handles or hinges for single-person operation.
Parameter Support: Features hot-dip galvanized coating with thickness ≥ 80μm, Passes 1000-hour neutral salt spray test, suitable for acidic/alkaline environments (pH 4-10)

Main Applications

Transportation Facilities: Ground-level access covers at airports, ports, and stations, ensuring smooth and safe vehicle passage.
Industrial Plants: Covering underground pipelines, valves, and equipment access channels in chemical plants, power stations, and wastewater treatment plants.
Construction and Real Estate: Covering utility trenches in residential complexes, parking lot drainage channels, and fire lane access points.

Frequently Asked Questions (FAQ)

Q1: What are the differences between horizontal Manhole Cover made of different materials?

A1: Carbon steel is economical but requires surface anti-corrosion treatment; Composite materials are insulating, lightweight, and suitable for electrical or corrosive environments.

Q2: How does a manhole cover ensure waterproof and dustproof effectiveness?

A2: The key lies in the sealing design. Choose products with rubber gaskets. During installation, ensure the frame is level and the gasket is properly compressed. Regularly inspect the sealing components for aging.

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