INDUSTRY COMPONENT

Flange Ring

A flange ring is a circular component that provides a secure, sealed connection between the manway and the pressure vessel body in industrial applications.

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Component Specifications

Definition
A flange ring is a critical component in pressure vessel manway assemblies, designed to create a robust, leak-proof interface between the removable manway cover and the vessel shell. It typically features bolt holes for fastening and a sealing surface to accommodate gaskets, ensuring pressure integrity and safety in high-pressure environments.
Working Principle
The flange ring works by distributing clamping force evenly via bolts to compress a gasket against its sealing surface, forming a tight seal that prevents fluid or gas leakage under pressure. It aligns and secures the manway cover to the vessel, allowing for safe access while maintaining structural integrity.
Materials
Common materials include carbon steel (e.g., ASTM A105), stainless steel (e.g., ASTM A182 F304/F316), or alloy steel, selected based on pressure, temperature, and corrosion resistance requirements.
Technical Parameters
  • Diameter Typically 300-600 mm
  • Thickness 10-25 mm
  • Surface Finish Ra 3.2 μm or smoother for sealing
  • Pressure Rating 150-300 psi
  • Bolt Circle Diameter As per ASME standards
Standards
ASME BPVC Section VIII, ISO 7005-1, DIN 2501

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flange Ring.

flange ring pressure vessel flange manway assembly industrial flange sealing component ASME standards high-pressure equipment Flange Ring in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Pressure Vessel Manway Assembly

Sealed access component for metal tanks and pressure vessels.

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Engineering Analysis

Risks & Mitigation
  • Leakage due to improper gasket compression
  • Bolt failure from over-torquing
  • Corrosion in aggressive environments
  • Misalignment causing seal failure
FMEA Triads
Trigger: Insufficient bolt torque
Failure: Gasket leakage under pressure
Mitigation: Follow torque specifications and use calibrated tools
Trigger: Material corrosion
Failure: Structural weakening and leaks
Mitigation: Select corrosion-resistant materials and implement regular inspections

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ASME B16.5, typically ±0.8 mm for bolt holes
Test Method
Hydrostatic pressure testing per ASME BPVC Section VIII, visual inspection, and dimensional checks

Buyer Feedback

★★★★☆ 4.7 / 5.0 (8 reviews)

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

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

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Frequently Asked Questions

What is the primary function of a flange ring in a pressure vessel?

It provides a sealed, bolted connection between the manway cover and vessel, ensuring no leakage under operational pressure.

How do you select the right material for a flange ring?

Based on factors like pressure, temperature, fluid compatibility, and corrosion resistance, with common choices being carbon or stainless steel per ASTM standards.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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