INDUSTRY COMPONENT

Flange Connections

Flange connections are mechanical joints used to connect pipes, valves, pumps, and other equipment in barrel assemblies, providing a secure, leak-proof seal.

Component Specifications

Definition
A flange connection is a type of mechanical joint that uses flanges—flat, circular discs with bolt holes—to connect sections of pipes, valves, or other components in industrial systems, such as barrel assemblies. It typically involves two flanges aligned and bolted together with a gasket inserted between them to create a pressure-tight seal. These connections are designed to withstand operational stresses, including pressure, temperature, and vibration, and are commonly used in applications requiring easy assembly, disassembly, and maintenance.
Working Principle
Flange connections work by clamping two flanges together with bolts, compressing a gasket between them to form a seal. The bolts apply a clamping force that ensures the gasket deforms to fill any surface imperfections, preventing leaks. The connection relies on proper bolt torque and gasket selection to maintain integrity under varying pressures and temperatures.
Materials
Common materials include carbon steel (ASTM A105), stainless steel (ASTM A182), alloy steel, and non-metallic options like PVC or fiberglass for corrosive environments. Gaskets are made from materials such as rubber, graphite, PTFE, or metal, depending on temperature and pressure requirements.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Diameter50-500 mm
Bolt SizeM10 to M24
Flange FaceRaised face (RF), flat face (FF), ring-type joint (RTJ)
Pressure RatingPN10 to PN100
Temperature Range-50°C to 500°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 7005, DIN 2501, ASME B16.5, EN 1092-1

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Leakage due to improper gasket installation
  • Bolt fatigue from vibration or thermal cycling
  • Corrosion in harsh environments
  • Misalignment causing stress concentrations
FMEA Triads
Trigger: Incorrect bolt torque
Failure: Gasket blowout or leakage
Mitigation: Use calibrated torque wrenches and follow tightening sequences.
Trigger: Gasket material degradation
Failure: Seal failure under high temperature
Mitigation: Select gaskets rated for operational temperature and chemical exposure.
Trigger: Flange face damage
Failure: Poor seal formation
Mitigation: Inspect and machine flange faces as needed before assembly.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Flange flatness within 0.1 mm per ISO 7005, bolt hole alignment within ±1 mm
Test Method
Pressure testing, visual inspection, and torque verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Flange Connections

Manufacturer profiles associated with Flange Connections.

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Frequently Asked Questions

What are the common types of flange connections?

Common types include weld neck, slip-on, threaded, socket weld, and blind flanges, each suited for different pressure and assembly needs.

How do you prevent leaks in flange connections?

Prevent leaks by using the correct gasket material, applying proper bolt torque in a star pattern, and ensuring flange faces are clean and aligned.

What standards apply to flange connections?

Key standards include ISO 7005 for dimensions, ASME B16.5 for pressure ratings, and DIN 2501 for design specifications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

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