Structured Manufacturing Data (2026)

Catalyst Canning / Housing

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Catalyst Canning / Housing used in the Motor Vehicle Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Catalyst Canning / Housing is characterized by the integration of Outer Shell and Insulation Layer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (Grade 409 or 304) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The protective metal enclosure that contains and supports the SCR catalyst substrate within the exhaust system.

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Product Specifications

Technical details and manufacturing context for Catalyst Canning / Housing

Definition
The catalyst canning or housing is a critical structural component in Selective Catalytic Reduction (SCR) systems that provides mechanical protection, thermal insulation, and secure mounting for the catalyst substrate. It ensures proper exhaust gas flow through the catalyst while protecting it from physical damage, vibration, and environmental factors.
Working Principle
The housing creates a sealed environment around the catalyst substrate, directing exhaust gases through the catalyst material while maintaining structural integrity under high temperatures and pressure differentials. It typically includes insulation layers to maintain optimal operating temperatures and mounting features for secure installation in the exhaust system.
Common Materials
Stainless Steel (Grade 409 or 304), Aluminized Steel, Insulation Mat (Ceramic Fiber)
Technical Parameters
  • Inner diameter must match catalyst substrate dimensions with precise clearance for proper fit and thermal expansion (mm) Standard Spec
Components / BOM
  • Outer Shell Part
    Primary structural protection and mounting interface
    Material: Stainless Steel
  • Insulation Layer Part
    Thermal insulation to maintain catalyst temperature and protect surrounding components
    Material: Ceramic Fiber Mat
  • Mounting Flanges Part
    Connection points to exhaust piping system
    Material: Stainless Steel
  • Retention System Part
    Secures catalyst substrate in position and accommodates thermal expansion
    Material: Spring Steel / Wire Mesh

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Catalyst Canning / Housing.

SCR Housing Catalyst Container Catalyst Shell stainless steel catalyst housing for SCR systems ceramic insulated catalyst canning for exhaust motor vehicle SCR catalyst retention system aluminized steel catalyst housing specifications catalyst canning mounting flanges and insulation

Applied To / Applications

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

Selective Catalytic Reduction (SCR) Catalyst
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 2 bar differential, 5 bar burst pressure
flow rate: 0.5-15 m/s exhaust gas velocity
temperature: -40°C to 650°C continuous, 900°C peak transient
slurry concentration: Not applicable (dry exhaust gas environment)
Media Compatibility
✓ Diesel exhaust gas ✓ Natural gas engine exhaust ✓ Marine engine exhaust
Unsuitable: Chlorinated or halogenated gas streams (risk of stress corrosion cracking)
Sizing Data Required
  • Catalyst substrate dimensions (diameter/length)
  • Exhaust system pressure drop requirements
  • Thermal expansion characteristics of catalyst substrate

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Catalyst bed channeling
Cause: Uneven flow distribution due to improper loading, support grid failure, or thermal cycling causing catalyst settling, leading to bypass of reactants and reduced conversion efficiency.
Pressure vessel fatigue cracking
Cause: Cyclic thermal stresses from startup/shutdown operations combined with corrosion under insulation (CUI) at weld seams or nozzle connections, exacerbated by inadequate stress relief during fabrication.
Maintenance Indicators
  • Sudden, sustained increase in pressure drop across the housing indicating potential bed compaction, fouling, or internal component failure
  • Visible external hot spots or thermal imaging showing abnormal temperature gradients on the vessel shell, suggesting refractory lining degradation or flow maldistribution
Engineering Tips
  • Implement laser scanning during catalyst loading to ensure uniform bed density and distribution, followed by periodic gamma scanning during operation to detect channeling or settling before performance degradation occurs
  • Install corrosion monitoring coupons under insulation at critical stress areas and use acoustic emission testing during thermal cycles to detect incipient crack formation in pressure boundary components

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM E155 - Standard Test Methods for Leaks Using the Mass Spectrometer Leak Detector CE Marking - Pressure Equipment Directive (PED) 2014/68/EU
Manufacturing Precision
  • Bore diameter: +/-0.025mm
  • Surface flatness: 0.08mm across mating surfaces
Quality Inspection
  • Helium leak test for hermetic sealing
  • Dimensional verification using coordinate measuring machine (CMM)

Factories Producing Catalyst Canning / Housing

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 materials are used in catalyst canning for motor vehicle SCR systems?

Catalyst canning typically uses stainless steel (Grade 409 or 304), aluminized steel for the outer shell, and ceramic fiber insulation mats to protect the SCR catalyst substrate from thermal and mechanical stress.

How does the insulation layer in catalyst housing improve SCR system performance?

The ceramic fiber insulation mat maintains optimal operating temperatures for the SCR catalyst, improves conversion efficiency of NOx emissions, and protects surrounding components from excessive heat.

What are the key components in a catalyst canning BOM for automotive applications?

The bill of materials includes the outer shell (stainless or aluminized steel), insulation layer (ceramic fiber), mounting flanges for system integration, and a retention system to secure the catalyst substrate.

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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Motor Vehicle Manufacturing.

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.

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