Carbon Steel Manhole Cover refers to a manhole cover whose main pressure-bearing components are manufactured from carbon steel materials. It is a key part of a standard manhole and a regular access cover for personnel to enter and exit equipment for installation and maintenance.
Product Parameters
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Parameter Category |
Specific Description |
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Classification by Pressure Condition |
Atmospheric pressure manhole, pressure-bearing manhole |
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Classification by Shape |
Circular manhole, elliptical manhole (applicable to atmospheric pressure/pressure-bearing equipment) |
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Rectangular manhole (only applicable to atmospheric pressure equipment) |
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Classification by Installation Position |
Horizontally installed manhole, vertically installed manhole |
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Manhole Cover Fixing Method |
Revolving cover type, lifting cover type |
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Material Selection |
Carbon steel |
Q235B(16mn) 20# A105 |
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Stainless steel |
304, 316, 316L, etc |
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Alloy steel |
12Cr1MoV, ALLOY59 |
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Other special materials |
C4 steel, HB3, HC276, MONEL 400, N08800, chromium-molybdenum steel, nickel-based alloy, etc |
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Product Features
- Excellent Strength and Durability: Designed in accordance with industry standards, the pressure rating covers from atmospheric pressure up to PN25, approximately 2.5 MPa. The core cover plate and flange are manufactured from Q345R pressure vessel steel, ensuring structural stability and fatigue resistance under long-term pressure.
- High Economy: The material cost of carbon steel manhole covers is 30%–50% lower than that of stainless steel. With mature manufacturing processes and low maintenance costs, they offer significant cost advantages throughout their entire service life.
- Wide Applicability: Core protection is provided by a professional sealing structure. Customized anti-corrosion treatments such as epoxy coating, hot-dip galvanizing, or rubber lining can be applied according to specific environmental requirements.
Main Applications
- Petrochemical and Refining Industry: Used for large atmospheric and low-pressure storage tanks, towers and heat exchangers.
- Municipal and Electrical Engineering: Installed on inspection wells of boilers, deaerators, thermal pipelines and urban underground pipe galleries.
- Shipbuilding and Offshore Engineering: Served as inspection hole covers for ship cabins, ballast tanks and auxiliary facilities of offshore platforms.
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