INDUSTRY COMPONENT

Cover/Flange

A cover or flange assembly for manholes and cleaning ports on industrial equipment, providing secure sealing and access.

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Component Specifications

Definition
A mechanical component designed to seal manholes and cleaning ports on tanks, vessels, and processing equipment. It consists of a cover plate, gasket, and fastening mechanism (bolts, clamps, or hinges) that creates a pressure-tight or contamination-proof seal while allowing periodic access for inspection, maintenance, or cleaning.
Working Principle
The cover/flange creates a sealed interface through compressive force applied by fasteners, which compresses a gasket between mating surfaces. This prevents leakage of contents (liquids, gases, or powders) and ingress of contaminants. Hinged or quick-opening designs facilitate safe, efficient access without complete disassembly.
Materials
Common materials include carbon steel (ASTM A36), stainless steel (304/316L), aluminum alloys, or engineered plastics (PTFE, polypropylene). Gaskets: elastomeric (EPDM, nitrile), graphite, or PTFE-based. Coatings: epoxy, galvanized, or powder-coated for corrosion resistance.
Technical Parameters
  • Diameter 150mm to 600mm (standard)
  • Fastening Bolted, clamped, or hinged
  • Seal Type Flat face, raised face, or ring-type joint
  • Surface Finish Ra ≤ 3.2 μm for gasket seating
  • Pressure Rating Up to 10 bar (150 psi)
  • Temperature Range -40°C to 200°C
Standards
ISO 14122, ASME B16.5, DIN 2501

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cover/Flange.

manhole cover cleaning port flange tank access cover pressure vessel flange industrial sealing component quick-opening hatch gasketed flange Cover/Flange Cover/Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Manhole/Cleaning Port

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

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Engineering Analysis

Risks & Mitigation
  • Gasket failure leading to leaks
  • Improper installation causing pressure release
  • Corrosion compromising structural integrity
  • Entrapment hazards during maintenance
FMEA Triads
Trigger: Gasket degradation due to chemical exposure or temperature
Failure: Leakage of contents or contamination ingress
Mitigation: Use compatible gasket materials; implement regular inspection and replacement schedules
Trigger: Over-torquing or under-torquing of bolts
Failure: Uneven sealing leading to leaks or bolt failure
Mitigation: Use calibrated torque wrenches; follow manufacturer's torque specifications and patterns

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flange flatness within 0.1 mm per 100 mm diameter; bolt hole alignment within ±0.5 mm
Test Method
Pressure testing per ASME BPVC Section VIII; leak testing with soap solution or helium mass spectrometry

Buyer Feedback

★★★★☆ 4.7 / 5.0 (13 reviews)

"The technical documentation for this Cover/Flange is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Cover/Flange so far."

"Testing the Cover/Flange now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the difference between a cover and a flange in this context?

A cover typically refers to the removable plate, while a flange is the fixed mounting ring on the equipment. Together, they form a sealed assembly.

How often should manhole covers be inspected?

Inspect during each opening, and perform formal checks annually for wear, corrosion, gasket integrity, and fastener torque.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Cover/Attachment Points Crankshaft