Flange Plates: Thickness Range 10-50 mm, Width 150-600 mm

Component Specifications

Definition

Flange plates are flat steel plates welded or bolted to the flanges of gantry bridge beams to create rigid connections between beam sections or to attach cross-members. They distribute loads across joints, prevent beam twisting under asymmetric loads, and maintain geometric alignment in portal crane and gantry systems. These plates are critical for structural integrity in material handling equipment, ensuring uniform stress distribution and preventing fatigue failure at connection points.

Working Principle

Flange plates work by creating a continuous load path across beam connections through shear transfer and moment resistance. When beams are subjected to bending loads, the plates transmit forces between adjacent sections via welded or bolted connections, preventing relative movement. They increase the effective flange area at joints, reducing stress concentrations and distributing loads to prevent local buckling or deformation.

Materials

Typically ASTM A36 or A572 Grade 50 carbon steel plates; thickness ranges from 10mm to 50mm depending on load requirements. High-strength alternatives include ASTM A514 for heavy-duty applications. Surface preparation includes shot blasting and priming with corrosion-resistant coatings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Width	150-600 mm
Length	300-1200 mm
Hole Pattern	Standard bolt circles per DIN 931
Surface Finish	SA 2.5 blasted
Thickness Range	10-50 mm
Flatness Tolerance	±1.5 mm/m

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 10721-1, DIN 18800-1, AWS D1.1

Parent Products

This component is used in the following industrial products

Gantry Bridge/Beam

The primary horizontal structural member of a gantry system that spans between vertical supports and provides the main load-bearing path.

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Engineering Analysis

Risks & Mitigation

Weld cracking due to improper preheating
Bolt hole misalignment causing assembly issues
Corrosion in humid environments without proper coating
Fatigue failure from cyclic loading

FMEA Triads

Trigger: Inadequate weld penetration
Failure: Crack propagation at connection points
Mitigation: Implement weld procedure specifications (WPS) and post-weld NDT

Trigger: Improper bolt torque
Failure: Joint slippage under load
Mitigation: Use calibrated torque wrenches and follow bolt tightening sequences

Trigger: Material defects in steel plates
Failure: Premature fracture
Mitigation: Material certification and ultrasonic testing of raw plates

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Hole positions ±0.5 mm, plate flatness ±1.5 mm/m, thickness ±0.8 mm

Test Method

Ultrasonic testing per EN 1712, dimensional checks with CMM, load testing per FEM 1.001

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

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Supplier transparency

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Manufacturers of Flange Plates

Manufacturer profiles associated with Flange Plates.

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Frequently Asked Questions

What is the primary function of flange plates in gantry systems?

Flange plates provide structural continuity between beam sections, transferring bending moments and shear forces while maintaining alignment under dynamic loads.

How are flange plates typically attached to beams?

They are welded using full-penetration groove welds per AWS D1.1 or bolted with high-strength bolts (Grade 8.8 or 10.9) in pre-drilled patterns.

What inspection is required for flange plate installations?

Visual inspection for weld defects, ultrasonic testing for internal flaws, and dimensional verification of bolt hole alignment per tolerance 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.

Flange Plates