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Dome Flange Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

A dome flange is a precision-engineered circular component with bolt holes and a sealing surface, specifically contoured to match the curvature of dome-shaped structures in pressure vessels, storage tanks, and reactors. It serves as the interface between the dome and connecting pipes or equipment, ensuring pressure integrity and structural stability under operational loads.

Working Principle

The dome flange operates by creating a bolted, gasketed joint that distributes mechanical loads evenly across the dome's curved surface. When tightened, bolts compress a gasket between mating surfaces, forming a pressure-tight seal that prevents leakage of contents (liquids, gases, or vapors) while withstanding internal pressure, thermal expansion, and external forces.

Materials

Typically manufactured from carbon steel (ASTM A105), stainless steel (ASTM A182 F304/F316), or alloy steel (ASTM A182 F11/F22). Materials are selected based on corrosion resistance, temperature, and pressure requirements. Surface finish: Ra ≤ 3.2 μm for sealing surfaces.

Technical Parameters

Sealing Type Raised face (RF) or ring-type joint (RTJ)
Pressure Rating PN10 to PN100 (or Class 150 to Class 600)
Flange Thickness 10-50 mm depending on pressure class
Temperature Range -20°C to +400°C
Bolt Circle Diameter Customized to dome curvature

Standards

ISO 7005-1, ASME B16.5, DIN 2633

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Dome Flange.

Parent Products

This component is used in the following industrial products

Dome

The curved structural element of a rupture disc that deforms under pressure to initiate rupture.

View Product Details

Engineering Analysis

Risks & Mitigation

Improper bolt tightening can cause leakage
Material corrosion in aggressive environments
Thermal cycling may lead to fatigue cracking

FMEA Triads

Trigger: Incorrect gasket selection or installation
Failure: Leakage of hazardous fluids
Mitigation: Use compatible gasket materials and follow torque specifications; implement regular inspection schedules.

Trigger: Thermal stress from temperature fluctuations
Failure: Flange warping or bolt loosening
Mitigation: Design with thermal expansion allowances; use high-temperature bolts and periodic retorquing procedures.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Bolt hole diameter: ±0.5 mm; Flange thickness: ±1 mm; Flatness: ≤0.1 mm per 100 mm diameter

Test Method

Hydrostatic pressure testing per ASME BPVC Section VIII; Helium leak testing for critical applications; Dye penetrant inspection for surface defects.

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 is the main difference between a dome flange and a standard flat flange?

A dome flange is curved to match the geometry of dome-shaped structures, ensuring uniform load distribution and preventing stress concentrations, whereas flat flanges are designed for cylindrical or flat surfaces.

Can dome flanges be used in high-temperature applications?

Yes, when made from appropriate materials like stainless steel or alloy steels, dome flanges can operate in temperatures up to 400°C, depending on the gasket material and design pressure.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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.

Dome Flange