Industry-Verified Manufacturing Data (2026)

Manhole/Cleaning Port

Based on aggregated insights from multiple verified 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
    Seals the opening and provides mounting surface
    Material: steel
  • Gasket/Seal
    Creates leak-proof seal between cover and tank
    Material: rubber or synthetic polymer
  • Bolts/Clamps
    Secures the cover in place
    Material: steel
  • Hinge (if applicable)
    Allows cover to swing open while remaining attached
    Material: steel
Engineering Reasoning
0-2.5 bar differential pressure
3.0 bar differential pressure or 150°C gasket temperature
Design Rationale: Gasket material yield strength exceeded at 3.0 bar differential pressure causing permanent deformation, or elastomer degradation above 150°C leading to seal failure
Risk Mitigation (FMEA)
Trigger Corrosion-induced wall thinning below 6.0 mm thickness in carbon steel
Mode: Structural collapse under hydrostatic load
Strategy: 316L stainless steel construction with 8.0 mm minimum wall thickness and cathodic protection
Trigger Bolted flange connection torque loss below 40 N·m
Mode: Process fluid leakage exceeding 0.1 mL/min
Strategy: Torque-to-yield bolts with 60 N·m preload and quarterly torque verification protocol

Industry Taxonomies & Aliases

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

stainless steel manhole for storage tank FRP cleaning port with hinge carbon steel tank access cover liquid storage tank inspection port industrial cleaning port with gasket

Applied To / Applications

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

Liquid Storage Tank
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Admixture Storage Tank
View system integration details

Industrial Ecosystem & Supply Chain DNA

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

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

P Project Engineer from United Arab Emirates Feb 06, 2026
★★★★★
"Found 33+ suppliers for Manhole/Cleaning Port on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
S Sourcing Manager from Australia Feb 03, 2026
★★★★★
"The technical documentation for this Manhole/Cleaning Port is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 31, 2026
★★★★★
"Reliable performance in harsh Fabricated Metal Product Manufacturing environments. No issues with the Manhole/Cleaning Port so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

16 sourcing managers are analyzing this specification now. Last inquiry for Manhole/Cleaning Port from UAE (1h ago).

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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 Specifications verified by CNFX Industrial Index (v2.6.03) for Fabricated Metal Product Manufacturing sector.

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