---
title: "Ductwork"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DUCTWORK"
  data_integrity_hash: "5117e13c26e31efddce102929baeb916"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:DUCTWORK"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ductwork.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ductwork"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.0 m/s air velocity, -20°C to 120°C temperature, 0-500 Pa pressure differential"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "Fatigue failure from cyclic pressure fluctuations (0.1-10 Hz), galvanic corrosion at dissimilar metal joints (ΔE &gt; 0.25 V), particulate erosion at velocities exceeding Stokes settling velocity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Condensate accumulation due to dew point crossing (50% RH at 30°C)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Insulation maintaining surface temperature 5°C above dew point with 25 mm mineral wool"
  - node_2:
      trigger: "Pulsation resonance at 8-12 Hz matching duct natural frequency"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Stiffener rings at 1.5 m intervals altering natural frequency to 18-22 Hz"
bom_nodes:
  straight-duct-sections:
    type: "component"
    urn: "URN:CNFX:ME:STRAIGHT_DUCT_SECTIONS"
    interface_type: "physical-logic-coupled"
  elbowsbends:
    type: "component"
    urn: "URN:CNFX:ME:ELBOWSBENDS"
    interface_type: "physical-logic-coupled"
  branchestees:
    type: "component"
    urn: "URN:CNFX:ME:BRANCHESTEES"
    interface_type: "physical-logic-coupled"
  dampers:
    type: "part"
    urn: "URN:CNFX:ME:DAMPERS"
    interface_type: "physical-logic-coupled"
  blast-gates:
    type: "part"
    urn: "URN:CNFX:ME:BLAST_GATES"
    interface_type: "physical-logic-coupled"
  flexible-duct:
    type: "part"
    urn: "URN:CNFX:ME:FLEXIBLE_DUCT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ANSI/SMACNA 006-2006: HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ductwork.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "b58636df1f31178d185042dc0a3f4248dc067f20b65e090d2363960d32a20e04"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Ductwork

## 1. Technical Definition
Network of pipes or channels that transport dust, fumes, or air within a dust collection system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.0 m/s air velocity, -20°C to 120°C temperature, 0-500 Pa pressure differential**. Failure boundary: **Material yield strength exceeded at 250 MPa stress concentration, 0.8 mm corrosion penetration, 15 m/s erosive velocity threshold**, Mechanism: **Fatigue failure from cyclic pressure fluctuations (0.1-10 Hz), galvanic corrosion at dissimilar metal joints (ΔE &gt; 0.25 V), particulate erosion at velocities exceeding Stokes settling velocity**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Condensate accumulation due to dew point crossing (50% RH at 30°C) | 8 | Corrosion-induced wall thinning exceeding 0.5 mm/year | Insulation maintaining surface temperature 5°C above dew point with 25 mm mineral wool |
| Pulsation resonance at 8-12 Hz matching duct natural frequency | 8 | Fatigue cracking at welded joints after 10^6 cycles | Stiffener rings at 1.5 m intervals altering natural frequency to 18-22 Hz |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Dampers](https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/dampers.md) `(Standalone System)`
- [Blast Gates](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/blast-gates.md) `(Standalone System)`
- [Flexible Duct](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/flexible-duct.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Dust Collector**, **Industrial Fan**, **Filter Media**  
**Downstream Applications**: Clean Air Systems, Industrial Ventilation Systems, Pollution Control Equipment  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are best for ductwork in corrosive environments?
**A**: Stainless steel or PVC ductwork is recommended for corrosive environments as they resist chemical degradation and maintain structural integrity longer than galvanized steel.

### Q: How do I determine the right duct size for my dust collection system?
**A**: Duct size depends on airflow requirements, material being transported, and system layout. Consult engineering specifications or a professional to calculate based on CFM needs and pressure drop.

### Q: What maintenance does industrial ductwork require?
**A**: Regular inspection for leaks, corrosion, or blockages; cleaning to prevent buildup; and checking components like blast gates and dampers for proper operation. Frequency depends on usage and material handled.

## 6. Manufacturing Compliance
- ANSI/SMACNA 006-2006: HVAC DUCT CONSTRUCTION STANDARDS - METAL AND FLEXIBLE

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Ductwork](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ductwork)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **6** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DUCTWORK | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f0b82ed0
