---
title: "Tank Shell"
industry: "Fabricated Metal Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TANK_SHELL"
  data_integrity_hash: "276e3b2fd185a4dacd7df0a2922d5285"
  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:TANK_SHELL"
  data_source_uri: "https://cnfx.com/llms/industry/fabricated-metal-product-manufacturing/product/tank-shell.md"
  official_resource_url: "https://cnfx.com/industry/fabricated-metal-product-manufacturing/product/tank-shell"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-2.5 bar (gauge pressure)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 355
    unit: "MPa"
    consequence: "Plastic deformation due to hoop stress exceeding material yield strength, calculated by σ_h = (P × D) / (2 × t) where P=internal pressure, D=tank diameter, t=shell thickness"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosion rate exceeding 0.5 mm/year due to chloride-induced pitting"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Cathodic protection system with -850 mV vs. Cu/CuSO4 reference electrode potential"
  - node_2:
      trigger: "Thermal cycling between -20°C and 80°C at 3 cycles/day"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Post-weld heat treatment at 600°C for 2 hours per ASME Section VIII requirements"
bom_nodes:
  shell-plate:
    type: "component"
    urn: "URN:CNFX:ME:SHELL_PLATE"
    interface_type: "physical-logic-coupled"
  longitudinal-seam:
    type: "component"
    urn: "URN:CNFX:ME:LONGITUDINAL_SEAM"
    interface_type: "physical-logic-coupled"
  circumferential-seam:
    type: "component"
    urn: "URN:CNFX:ME:CIRCUMFERENTIAL_SEAM"
    interface_type: "physical-logic-coupled"
  shell-reinforcement:
    type: "component"
    urn: "URN:CNFX:ME:SHELL_REINFORCEMENT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "EN 14015:2004 - SPECIFICATION FOR THE DESIGN AND MANUFACTURE OF SITE BUILT, VERTICAL, CYLINDRICAL, FLAT-BOTTOMED, ABOVE GROUND, WELDED, STEEL TANKS FOR THE STORAGE OF LIQUIDS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/fabricated-metal-product-manufacturing/product/tank-shell.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "36d080ec897d9e7df0a614868f37e7d95b1cc65a027c743177d9941391944ae4"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Tank Shell

## 1. Technical Definition
The primary structural enclosure of an insulated storage tank that contains the stored material and provides pressure containment.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-2.5 bar (gauge pressure)**. Failure boundary: **Yield strength of 355 MPa for structural steel at 20°C**, Mechanism: **Plastic deformation due to hoop stress exceeding material yield strength, calculated by σ_h = (P × D) / (2 × t) where P=internal pressure, D=tank diameter, t=shell thickness**.

### 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 |
| :--- | :--- | :--- | :--- |
| Corrosion rate exceeding 0.5 mm/year due to chloride-induced pitting | 8 | Wall thickness reduction below minimum design thickness of 6 mm | Cathodic protection system with -850 mV vs. Cu/CuSO4 reference electrode potential |
| Thermal cycling between -20°C and 80°C at 3 cycles/day | 8 | Fatigue crack initiation at weld seams after 10^5 cycles | Post-weld heat treatment at 600°C for 2 hours per ASME Section VIII requirements |

## 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**: **Rolling Mill**, **Welding Positioner**, **Shot Blasting Machine**  
**Downstream Applications**: Insulated Storage Tank, Pressure Vessel, Chemical Storage Container  

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

### Q: What materials are commonly used for tank shell fabrication?
**A**: Tank shells are typically fabricated from carbon steel, stainless steel, or aluminum, depending on the stored material's corrosiveness, temperature requirements, and industry specifications.

### Q: How are tank shells reinforced for pressure containment?
**A**: Tank shells are reinforced through circumferential and longitudinal seams, along with specialized shell plates and reinforcement components, to ensure structural integrity and safe pressure containment in insulated storage systems.

### Q: What industries use fabricated metal tank shells?
**A**: Tank shells are essential in fabricated metal product manufacturing for industries including chemical processing, oil and gas, food and beverage, pharmaceuticals, and water treatment, where insulated storage and pressure containment are critical.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- EN 14015:2004 - SPECIFICATION FOR THE DESIGN AND MANUFACTURE OF SITE BUILT, VERTICAL, CYLINDRICAL, FLAT-BOTTOMED, ABOVE GROUND, WELDED, STEEL TANKS FOR THE STORAGE OF LIQUIDS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Tank Shell](https://cnfx.com/industry/fabricated-metal-product-manufacturing/product/tank-shell)**

### 🌐 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**: TANK_SHELL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: deff5d6c
