Industry-Verified Manufacturing Data (2026)

Flange Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Flange Assembly used in the Electrical Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Flange Assembly is characterized by the integration of Flange Plate and Sealing Gasket. In industrial production environments, manufacturers listed on CNFX commonly emphasize Aluminum alloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural component that provides mechanical connection and sealing interface in high-voltage insulating bushings.

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Product Specifications

Technical details and manufacturing context for Flange Assembly

Definition
The flange assembly is a critical part of a high-voltage insulating bushing that serves as the mounting and sealing interface between the bushing and the transformer or switchgear tank. It ensures proper mechanical support, electrical insulation continuity, and environmental sealing to prevent oil or gas leakage while maintaining dielectric integrity under high-voltage conditions.
Working Principle
The flange assembly creates a secure mechanical connection between the bushing and equipment housing through bolted joints, while incorporating gaskets or sealing systems to prevent fluid leakage. It maintains electrical insulation by properly spacing conductive elements and may include grading rings or shielding to manage electric field distribution.
Common Materials
Aluminum alloy, Stainless steel, Galvanized steel
Technical Parameters
  • Flange diameter, bolt circle diameter, number of bolt holes, and thickness specifications (mm) Per Request
Components / BOM
  • Flange Plate
    Primary structural element providing mounting surface and mechanical strength
    Material: Aluminum alloy or steel
  • Sealing Gasket
    Creates fluid-tight seal between flange and mating surface
    Material: Nitrile rubber or silicone
  • Mounting Bolts
    Secure the flange assembly to the equipment housing
    Material: Stainless steel
  • Insulating Sleeve
    Provides electrical insulation around mounting bolts
    Material: Porcelain or composite polymer
Engineering Reasoning
0-550 kV AC, 0-800 kV DC, -40°C to +105°C ambient, 0-2.5 MPa sealing pressure
Dielectric breakdown at >30 kV/mm electric field strength, mechanical failure at >450 MPa tensile stress, seal failure at >3.0 MPa differential pressure
Design Rationale: Partial discharge initiation at 0.5 pC apparent charge leading to tracking erosion, stress corrosion cracking at >0.6 yield strength under 50 ppm moisture, thermal cycling fatigue at ΔT>80°C causing creep deformation
Risk Mitigation (FMEA)
Trigger Moisture ingress exceeding 1000 ppm at 90% relative humidity
Mode: Surface tracking and insulation degradation leading to flashover
Strategy: Triple O-ring sealing with desiccant-filled cavity and moisture monitoring sensors
Trigger Mechanical vibration at >0.5 g RMS acceleration above 100 Hz
Mode: Bolt loosening and gasket compression loss causing pressure leakage
Strategy: Torque-controlled flange bolts with Nord-Lock washers and vibration-damping mounts

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flange Assembly.

high voltage flange assembly electrical insulating bushing flange plate aluminum alloy flange assembly sealing gasket flange electrical mounting bolts for flange assembly

Applied To / Applications

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

Viewport Assembly
View system integration details
Thermowell Assemblies
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High-Voltage Bushings
View system integration details
Sterile Product Tank Interface
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Gas Offtake
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (145 psi)
other spec: Voltage rating: 72.5 kV to 800 kV, Sealing force: 20-100 kN
temperature: -40°C to +150°C
Media Compatibility
✓ SF6 gas insulation systems ✓ Mineral oil transformer fluids ✓ Dry air/nitrogen environments
Unsuitable: Corrosive chemical environments with acids or strong bases
Sizing Data Required
  • Bushing nominal voltage (kV)
  • Flange mounting interface dimensions (mm/in)
  • Required sealing pressure and gasket type

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Flange face corrosion
Cause: Chemical attack from process fluids or atmospheric exposure leading to material degradation and sealing surface loss
Gasket failure
Cause: Improper gasket selection, over-torquing during assembly, or thermal cycling causing compression set or blowout
Maintenance Indicators
  • Visible fluid leakage at flange joint interface
  • Audible hissing or whistling sound indicating pressure escape
Engineering Tips
  • Implement proper bolt torque sequence and tension monitoring during assembly to ensure uniform gasket compression
  • Use corrosion-resistant flange materials or protective coatings matched to service environment, and conduct regular NDT thickness testing

Compliance & Manufacturing Standards

Reference Standards
ISO 7005-1:2011 (Pipe flanges) ANSI/ASME B16.5:2020 (Pipe Flanges and Flanged Fittings) DIN EN 1092-1:2018 (Flanges and their joints)
Manufacturing Precision
  • Bore diameter: +/- 0.05 mm
  • Flatness: 0.1 mm per 300 mm diameter
Quality Inspection
  • Dye Penetrant Test (DPT) for surface defects
  • Dimensional verification with coordinate measuring machine (CMM)

Factories Producing Flange Assembly

Verified manufacturers with capability to produce this product in China

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✓ 92% Supplier Capability Match Found

P Procurement Specialist from United States Jan 07, 2026
★★★★★
"Testing the Flange Assembly now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
T Technical Director from United Arab Emirates Jan 04, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
P Project Engineer from Australia Jan 01, 2026
★★★★★
"As a professional in the Electrical Equipment Manufacturing sector, I confirm this Flange Assembly meets all ISO standards."
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 Flange Assembly from UAE (1h ago).

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Frequently Asked Questions

What materials are used in this flange assembly for electrical equipment?

This flange assembly is constructed from durable materials including aluminum alloy for lightweight strength, stainless steel for corrosion resistance, and galvanized steel for cost-effective protection, ensuring reliability in electrical applications.

How does the flange assembly ensure proper sealing in high-voltage insulating bushings?

The assembly includes a precision sealing gasket and insulating sleeve that create a tight interface, preventing environmental contamination and maintaining dielectric integrity in high-voltage environments.

What components are included in the flange assembly BOM?

The bill of materials includes a flange plate for structural connection, insulating sleeve for electrical isolation, mounting bolts for secure fastening, and a sealing gasket to maintain environmental protection.

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 Electrical Equipment Manufacturing sector.

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