INDUSTRY COMPONENT

Support Grid/Frame

Structural framework supporting catalyst gauze in chemical reactors for ammonia oxidation and nitric acid production.

Component Specifications

Definition
A rigid metallic grid or frame assembly designed to hold multiple layers of platinum-rhodium catalyst gauze in fixed position within high-temperature reactors. It maintains proper spacing, alignment, and tension of gauze layers while withstanding thermal expansion, mechanical stresses, and corrosive gas environments during ammonia oxidation processes at 800-950°C.
Working Principle
Provides mechanical support and uniform gas distribution by maintaining precise geometric arrangement of catalyst gauze layers. The grid structure allows thermal expansion while preventing gauze sagging or contact, ensuring optimal catalytic surface exposure and reaction efficiency.
Materials
High-temperature nickel-chromium alloys (e.g., Inconel 600/601, RA330) or stainless steel (310S) with oxidation resistance. Wire diameter: 3-6mm. Surface finish: pickled and passivated.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Mesh Size20-40 mm
Grid PatternSquare or hexagonal mesh
Load Capacity50-200 kg/m²
Wire Diameter4mm typical
Pressure Rating5-10 bar
Frame DimensionsCustom to reactor diameter (1-5m)
Operating Temperature800-950°C
Thermal Expansion Allowance±15mm

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 5755, DIN 17175, ASTM B166

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Thermal fatigue cracking
  • High-temperature oxidation
  • Mechanical deformation from gauze tension
  • Corrosion from nitric acid condensation
FMEA Triads
Trigger: Thermal cycling during startup/shutdown
Failure: Grid warping or cracking
Mitigation: Use alloys with matched thermal expansion coefficients; implement controlled heating/cooling cycles
Trigger: Insufficient tensioning
Failure: Gauze sagging and contact points
Mitigation: Precise tensioning during installation; regular inspection protocols
Trigger: High-temperature oxidation
Failure: Reduced structural integrity
Mitigation: Select oxidation-resistant alloys; apply protective coatings if compatible

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±2mm dimensional tolerance, ±5° flatness
Test Method
Dimensional inspection, high-temperature creep testing, oxidation resistance per ASTM G54

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
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Manufacturers of Support Grid/Frame

Manufacturer profiles associated with Support Grid/Frame.

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Frequently Asked Questions

Why are high-temperature alloys used for support grids?

Nickel-chromium alloys maintain strength and resist oxidation at 800-950°C operating temperatures, preventing deformation and corrosion in ammonia-air mixtures.

How does grid design affect catalyst performance?

Proper mesh size and tension prevent gauze contact (which causes hot spots) and ensure uniform gas flow, optimizing ammonia conversion efficiency and gauze lifespan.

What maintenance is required for support grids?

Regular inspection for warping, oxidation damage, and proper tensioning during catalyst changeouts (typically every 3-12 months depending on operation).

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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