Industry-Verified Manufacturing Data (2026)

Manhole/Access Hatch

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Manhole/Access Hatch 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/Access Hatch is characterized by the integration of Hatch Cover 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.

A removable cover or door that provides access to the interior of a recovery tank for inspection, maintenance, and cleaning purposes.

Product Specifications

Technical details and manufacturing context for Manhole/Access Hatch

Definition
The manhole/access hatch is a critical safety and maintenance component of a recovery tank, designed as a sealed opening that allows personnel to enter or inspect the tank's interior. It ensures secure containment while providing necessary access for operations such as cleaning, repair, equipment installation, and visual inspection of internal conditions.
Working Principle
The hatch operates as a removable or hinged closure that seals against a gasket or flange on the tank opening. When closed, it maintains pressure integrity and prevents leaks. When opened, it provides a safe entry point following proper safety procedures (lockout/tagout, ventilation checks, etc.).
Common Materials
Stainless Steel, Carbon Steel, Aluminum
Technical Parameters
  • Diameter or dimensions of the hatch opening (mm) Customizable
Components / BOM
  • Hatch Cover
    Primary sealing surface that closes the opening
    Material: steel
  • Gasket/Seal
    Provides leak-proof seal between cover and flange
    Material: rubber or silicone
  • Hinges/Bolts
    Mechanism for securing and opening the hatch
    Material: steel
  • Safety Lock
    Prevents accidental opening during operation
    Material: steel
Engineering Reasoning
0-0.5 bar differential pressure
1.2 bar differential pressure causing permanent deformation exceeding 3mm
Design Rationale: Plastic deformation due to exceeding yield strength of 275 MPa in ASTM A36 steel at 0.2% offset
Risk Mitigation (FMEA)
Trigger Corrosion-induced material thinning below 4mm thickness
Mode: Structural collapse under 0.8 bar differential pressure
Strategy: 316L stainless steel construction with 6mm minimum thickness and cathodic protection
Trigger Fatigue cracking from 10^5+ cyclic pressure fluctuations between 0-0.3 bar
Mode: Through-thickness fracture propagation at 15mm crack length
Strategy: Elliptical design with 3:1 major:minor axis ratio and shot peening to induce 400 MPa compressive residual stress

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Manhole/Access Hatch.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 1.5 bar (standard), up to 6 bar with reinforced design
other spec: Slurry concentration: up to 60% solids by weight, Flow rate: N/A (static application)
temperature: -20°C to 80°C (standard elastomer seals), up to 150°C with high-temp seals
Media Compatibility
✓ Water/wastewater ✓ Chemical process fluids (pH 2-12) ✓ Food-grade liquids
Unsuitable: Hydrofluoric acid or strong oxidizing agents
Sizing Data Required
  • Tank opening diameter/geometry
  • Required pressure rating
  • Access frequency/load class

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and structural degradation
Cause: Exposure to harsh chemicals, moisture, or environmental contaminants leading to material breakdown, pitting, or loss of structural integrity.
Seal failure and leakage
Cause: Deterioration or improper seating of gaskets/O-rings due to age, temperature extremes, or mechanical damage, compromising containment.
Maintenance Indicators
  • Visible corrosion, cracks, or deformation around the hatch frame or sealing surfaces
  • Audible hissing or whistling indicating pressure/vacuum leaks, or visible fluid seepage around the seal
Engineering Tips
  • Implement a routine inspection and cleaning schedule to remove debris and contaminants, and apply appropriate corrosion inhibitors or protective coatings to vulnerable surfaces.
  • Use torque-controlled tightening procedures during installation/reassembly to ensure even gasket compression without overstressing components, and replace seals proactively based on service life data.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM F2413 - Standard Specification for Performance Requirements for Protective Footwear EN 124 - Gully tops and manhole tops for vehicular and pedestrian areas
Manufacturing Precision
  • Bore Diameter: +/- 0.5mm
  • Surface Flatness: 0.2mm per 100mm
Quality Inspection
  • Dimensional Verification Test
  • Load Bearing Capacity Test

Factories Producing Manhole/Access Hatch

Verified manufacturers with capability to produce this product in China

✓ 96% Supplier Capability Match Found

P Procurement Specialist from Australia Jan 27, 2026
★★★★★
"The Manhole/Access Hatch we sourced perfectly fits our Fabricated Metal Product Manufacturing production line requirements."
Technical Specifications Verified
T Technical Director from Singapore Jan 24, 2026
★★★★★
"Found 43+ suppliers for Manhole/Access Hatch on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Project Engineer from Germany Jan 21, 2026
★★★★★
"The technical documentation for this Manhole/Access Hatch is very thorough, especially regarding technical reliability."
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.”

11 sourcing managers are analyzing this specification now. Last inquiry for Manhole/Access Hatch from UAE (56m ago).

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Frequently Asked Questions

What materials are available for the manhole/access hatch?

Our hatches are fabricated in stainless steel, carbon steel, and aluminum to suit different industrial environments and corrosion resistance needs.

What components are included in the hatch assembly?

Each hatch includes a cover, gasket/seal, hinges or bolts for mounting, and a safety lock to secure access points.

What are the primary applications for this access hatch?

It provides secure access to recovery tanks for inspection, routine maintenance, and thorough cleaning operations in industrial settings.

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.

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