Manhole Cover for Cleaning Solution Tanks

Q: What materials are available for manhole covers?

According to the directory, manhole covers can be made from stainless steel, carbon steel, or fiberglass reinforced plastic. Material grades such as 304 or 316L are listed for corrosive media. Always confirm the exact material and grade with the supplier for your specific application.

Q: What are the typical operating pressure and temperature ranges?

The directory lists operating pressure from 1.0 to 1.6 MPa and operating temperature from -20 to 120°C. These are reference ranges; verify the actual limits for the specific model and application with the manufacturer.

Q: What standards are referenced for manhole covers?

Standards referenced include testing and leakage, EN 13445 for pressure vessels, ASTM A240 for material grades, DIN 24960 for seal materials, ISO 4287 for surface finish, and EN 1591-1 for bolt torque. These are procurement references and do not imply certification.

Q: How is the manhole cover sealed to prevent leaks?

The cover uses gaskets or O-rings made from materials like EPDM or NBR to create a pressure-tight seal when bolted or clamped. The leakage rate is specified as 0.01 to 0.1 cm³/min. Proper bolt torque (80-120 N·m) is essential for effective sealing.

Product Specifications

Technical details and manufacturing context for Manhole/Cover

Definition

A manhole cover is a critical safety and access component installed on cleaning solution tanks. It serves as a sealed entry point that allows personnel to safely enter the tank for inspection, cleaning, maintenance, and repair tasks. The cover is designed to be securely fastened to prevent leaks and ensure containment of cleaning solutions, while also being removable when access is required. It typically incorporates safety features such as locking mechanisms, pressure relief valves, or viewing ports depending on the tank design and application requirements. The cover is manufactured from materials such as stainless steel, carbon steel, or fiberglass reinforced plastic, with material grades like 304 or 316L for corrosive media. Standard nominal diameters range from 400 to 600 mm, operating pressures from 1.0 to 1.6 MPa, and operating temperatures from -20 to 120°C. Seal materials include EPDM or NBR, and surface finishes range from 0.8 to 1.6 μm Ra for hygienic applications. The weight typically ranges from 15 to 30 kg, and leakage rates are controlled to 0.01 to 0.1 cm³/min. Bolt torque specifications are 80 to 120 N·m, and opening angles range from 90 to 180 degrees. These parameters are reference ranges and must be verified for the specific model and application. Standards such as EN 13445, ASTM A240, DIN 24960, ISO 4287, and EN 1591-1 are referenced for procurement and verification, but do not imply certification. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The manhole cover functions as a removable barrier that seals the tank opening. When closed and secured with bolts or clamps, it creates a pressure-tight seal using gaskets or O-rings to prevent leakage of cleaning solutions and maintain tank integrity. The cover can be opened by releasing the fastening mechanisms, allowing safe access to the tank interior. Some designs may include safety interlocks that prevent opening under pressure or while equipment is operating.

Common Materials

Stainless Steel, Carbon Steel, Fiberglass Reinforced Plastic

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	400–600 mm	Standard sizes for tank access
Operating Pressure	1.0–1.6 MPa
Operating Temperature	-20–120 °C	Sealing degrades above 120°CEN 13445
Material Grade	304/316L	316L for corrosive mediaASTM A240
Seal Material	EPDM/NBR	NBR for oil resistanceDIN 24960
Surface Finish	0.8–1.6 μm Ra	Hygienic applications require <0.8ISO 4287
Weight	15–30 kg	Depends on size and pressure rating
Leakage Rate	0.01–0.1 cm³/min	Rate C for liquid service
Bolt Torque	80–120 N·m	Follow gasket manufacturer's specEN 1591-1
Opening Angle	90–180 °	180° for full access

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Cover Plate Part
Main structural component that seals the tank opening

Material: Stainless Steel
Gasket/Seal Part
Creates a leak-proof seal between the cover and tank flange

Material: EPDM Rubber
Fastening Bolts/Clamps Part
Secures the cover to the tank flange

Material: Stainless Steel
Hinge (if applicable) Optional Part
Allows the cover to swing open while remaining attached

Material: Stainless Steel
Safety Lock Part
Prevents accidental opening during operation

Material: Stainless Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Cleaning Solution Tanks

View system integration details

Manufacturers of Manhole/Cover

Manufacturer profiles associated with Manhole/Cover.

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Frequently Asked Questions

What materials are available for manhole covers?

According to the directory, manhole covers can be made from stainless steel, carbon steel, or fiberglass reinforced plastic. Material grades such as 304 or 316L are listed for corrosive media. Always confirm the exact material and grade with the supplier for your specific application.

What are the typical operating pressure and temperature ranges?

The directory lists operating pressure from 1.0 to 1.6 MPa and operating temperature from -20 to 120°C. These are reference ranges; verify the actual limits for the specific model and application with the manufacturer.

What standards are referenced for manhole covers?

Standards referenced include testing and leakage, EN 13445 for pressure vessels, ASTM A240 for material grades, DIN 24960 for seal materials, ISO 4287 for surface finish, and EN 1591-1 for bolt torque. These are procurement references and do not imply certification.

How is the manhole cover sealed to prevent leaks?

The cover uses gaskets or O-rings made from materials like EPDM or NBR to create a pressure-tight seal when bolted or clamped. The leakage rate is specified as 0.01 to 0.1 cm³/min. Proper bolt torque (80-120 N·m) is essential for effective sealing.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 1.5 bar (gauge)
other spec:	Slurry concentration up to 40% solids by weight, no flow rate dependency
temperature:	-20°C to 120°C

Manhole/Cover

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards