---
title: "Lance Body/Tube"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LANCE_BODYTUBE"
  data_integrity_hash: "3bcd8b4d2e00a02d0171b2f8680d6ea2"
  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:LANCE_BODYTUBE"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/lance-bodytube.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/lance-bodytube"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 MPa (5-30 bar) at 20-1200°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.5
    unit: "MPa"
    consequence: "Creep rupture due to Larson-Miller parameter exceeding 35,000 (P = T(20 + log t) × 10⁻³) where T is temperature in Kelvin and t is time in hours"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Oxygen flow velocity exceeding 300 m/s at lance tip"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Tungsten carbide coating (HVOF) with 0.5 mm thickness on inner surface"
  - node_2:
      trigger: "Thermal cycling between 200°C and 1200°C exceeding 1000 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral forged construction with controlled cooling rate of 50°C/min during manufacturing"
bom_nodes:
  outer-shell:
    type: "component"
    urn: "URN:CNFX:ME:OUTER_SHELL"
    interface_type: "physical-logic-coupled"
  oxygen-channel:
    type: "component"
    urn: "URN:CNFX:ME:OXYGEN_CHANNEL"
    interface_type: "physical-logic-coupled"
  cooling-water-jacket:
    type: "component"
    urn: "URN:CNFX:ME:COOLING_WATER_JACKET"
    interface_type: "physical-logic-coupled"
  connection-flange:
    type: "component"
    urn: "URN:CNFX:ME:CONNECTION_FLANGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "EN 10204:2004 - METALLIC PRODUCTS - TYPES OF INSPECTION DOCUMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/lance-bodytube.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "0259b7ad2b294b312872b68ecf226a87b90739bc11eb2a915f1f80d9e5b6649d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Lance Body/Tube

## 1. Technical Definition
The main structural component of an oxygen lance that houses and protects the oxygen delivery mechanism.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 MPa (5-30 bar) at 20-1200°C**. Failure boundary: **3.5 MPa (35 bar) internal pressure at 1200°C or 0.3 MPa (3 bar) at 1300°C**, Mechanism: **Creep rupture due to Larson-Miller parameter exceeding 35,000 (P = T(20 + log t) × 10⁻³) where T is temperature in Kelvin and t is time in hours**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Oxygen flow velocity exceeding 300 m/s at lance tip | 8 | Erosion-induced wall thinning below 2 mm thickness | Tungsten carbide coating (HVOF) with 0.5 mm thickness on inner surface |
| Thermal cycling between 200°C and 1200°C exceeding 1000 cycles | 8 | Thermal fatigue cracking initiating at weld joints | Integral forged construction with controlled cooling rate of 50°C/min during manufacturing |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Oxygen Supply System**, **Lance Manipulator**, **Cooling Water System**  
**Downstream Applications**: Steel Ingots, Molten Iron, Refined Copper  

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

### Q: What materials are commonly used for lance body/tube construction?
**A**: Lance bodies/tubes are typically manufactured from low carbon steel for cost-effectiveness, stainless steel for corrosion resistance, or copper alloys for enhanced thermal conductivity in demanding metal manufacturing applications.

### Q: What are the main components of a lance body/tube assembly?
**A**: Key components include the connection flange for attachment, cooling water jacket for temperature control, outer shell for structural integrity, and oxygen channel for precise gas delivery in basic metal manufacturing processes.

### Q: How does the lance body/tube protect the oxygen delivery mechanism?
**A**: The lance body/tube serves as the primary structural housing that shields the internal oxygen delivery system from extreme temperatures, mechanical stress, and environmental factors during metal production operations like steelmaking.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- EN 10204:2004 - METALLIC PRODUCTS - TYPES OF INSPECTION DOCUMENTS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Lance Body/Tube](https://cnfx.com/industry/basic-metal-manufacturing/product/lance-bodytube)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: LANCE_BODYTUBE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9dc40b79
