Structured Manufacturing Data (2026)

Manhole/Cleaning Port

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Manhole/Cleaning Port used in the Fabricated Metal Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Manhole/Cleaning Port is characterized by the integration of Cover/Flange and Gasket/Seal. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

An access opening on a liquid storage tank for inspection, maintenance, and cleaning purposes.

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Product Specifications

Technical details and manufacturing context for Manhole/Cleaning Port

Definition

A manhole/cleaning port is a critical safety and maintenance component of liquid storage tanks that provides personnel access to the tank interior for inspection, cleaning, repair, and emergency response. It typically consists of a reinforced opening with a removable cover or door that can be securely sealed to maintain tank integrity and prevent leaks or contamination.

Working Principle

The manhole/cleaning port functions as a sealed access point that can be opened when needed for tank entry or cleaning equipment insertion, then securely closed and sealed to maintain the tank's containment integrity, pressure rating (if applicable), and prevent environmental contamination.

Common Materials

Stainless Steel, Carbon Steel, Fiberglass Reinforced Plastic

Technical Parameters

Diameter or dimensions of the access opening (mm) Per Request

Components / BOM

Cover/Flange Part
Seals the opening and provides mounting surface

Material: steel
Gasket/Seal Part
Creates leak-proof seal between cover and tank

Material: rubber or synthetic polymer
Bolts/Clamps Part
Secures the cover in place

Material: steel
Hinge (if applicable) Part
Allows cover to swing open while remaining attached

Material: steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Manhole/Cleaning Port.

Applied To / Applications

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

Liquid Storage Tank

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Admixture Storage Tank

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Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits

pressure:	Atmospheric to 1.5 bar (standard), up to 10 bar with reinforced design
other spec:	Slurry concentration: Up to 40% solids by weight, Flow rate: N/A (static access port)
temperature:	-20°C to 120°C (standard), up to 200°C with special seals

Media Compatibility

✓ Water/wastewater treatment ✓ Food-grade liquids (dairy, beverages) ✓ Chemical storage (acids, alkalis with compatible materials)

Unsuitable: High-pressure steam systems (>10 bar, >200°C)

Sizing Data Required

Tank diameter/access requirements (minimum 450mm for personnel entry)
Required pressure rating (operating vs. design pressure)
Material compatibility (tank material, fluid chemistry, temperature)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Corrosion-induced leakage

Cause: Chemical attack from process fluids or atmospheric exposure, leading to material degradation and loss of seal integrity, often accelerated by improper material selection or lack of protective coatings.

Gasket/seal failure

Cause: Compression set, thermal degradation, or chemical incompatibility of sealing materials, resulting in leaks; commonly due to incorrect gasket material specification, over-torquing, or aging without timely replacement.

Maintenance Indicators

Visible fluid seepage or staining around the manhole flange or cleaning port edges
Audible hissing or dripping sounds indicating pressure/vacuum loss or liquid escape

Engineering Tips

Implement regular torque checks and re-torquing schedules for fasteners using a calibrated torque wrench to maintain proper gasket compression and prevent flange distortion
Apply corrosion-resistant coatings or linings compatible with process media, and conduct periodic non-destructive testing (e.g., ultrasonic thickness gauging) to monitor material wear

Compliance & Manufacturing Standards

Reference Standards

ISO 14692-2:2002 (Petroleum and natural gas industries - Glass-reinforced plastics (GRP) piping) ANSI/AWWA C207-16 (Steel Pipe Flanges for Waterworks Service, Sizes 4 In. Through 144 In.) DIN EN 124:2015 (Gully tops and manhole tops for vehicular and pedestrian areas)

Manufacturing Precision

Bore diameter: +/- 0.5 mm
Flatness of sealing surface: 0.2 mm

Quality Inspection

Dye Penetrant Test for surface defects
Hydrostatic Pressure Test for leak tightness

Factories Producing Manhole/Cleaning Port

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are available for manhole/cleaning ports?

Our manhole/cleaning ports are fabricated in stainless steel, carbon steel, and fiberglass reinforced plastic (FRP) to suit various industrial applications and corrosion resistance needs.

What components are included in the BOM for a manhole/cleaning port?

The bill of materials typically includes bolts/clamps, cover/flange, gasket/seal, and hinge (if applicable), ensuring a complete and secure access solution.

What are the primary uses of a manhole/cleaning port on a liquid storage tank?

It provides safe access for inspection, maintenance, and cleaning of liquid storage tanks, facilitating routine checks and ensuring operational efficiency and safety.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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