---
title: "Dome"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DOME"
  data_integrity_hash: "64e9d4f9e1efbd769b8520d1e87e3d8d"
  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:DOME"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/dome.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/dome"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-15.0 bar (gauge pressure)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 15.3
    unit: "bar"
    consequence: "Plastic deformation exceeding yield strength (σ_y = 240 MPa for 316L stainless steel) followed by ductile fracture initiation at stress concentration points"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Pressure cycling exceeding 10^5 cycles at 80% of rated burst pressure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Finite element analysis optimization of dome curvature (R/t ratio = 10:1) to minimize stress concentration factors"
  - node_2:
      trigger: "Corrosive media exposure (pH &lt; 4.0) at temperatures above 60°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Electropolishing surface finish (Ra &lt; 0.4 μm) with 25 μm PTFE coating for chemical resistance"
bom_nodes:
  dome-crown:
    type: "component"
    urn: "URN:CNFX:ME:DOME_CROWN"
    interface_type: "physical-logic-coupled"
  dome-flange:
    type: "component"
    urn: "URN:CNFX:ME:DOME_FLANGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "EN 13445-3:2021 UNFIRED PRESSURE VESSELS - PART 3: DESIGN"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/dome.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "3194b63ee82596a60a9eb0b2a673b432974b28cfc4093c8432438c2ead081b4a"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Dome

## 1. Technical Definition
The curved structural element of a rupture disc that deforms under pressure to initiate rupture.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-15.0 bar (gauge pressure)**. Failure boundary: **15.3 bar (gauge pressure) at 20°C ambient temperature**, Mechanism: **Plastic deformation exceeding yield strength (σ_y = 240 MPa for 316L stainless steel) followed by ductile fracture initiation at stress concentration points**.

### 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 |
| :--- | :--- | :--- | :--- |
| Pressure cycling exceeding 10^5 cycles at 80% of rated burst pressure | 8 | Fatigue crack propagation from dome apex leading to premature rupture | Finite element analysis optimization of dome curvature (R/t ratio = 10:1) to minimize stress concentration factors |
| Corrosive media exposure (pH &lt; 4.0) at temperatures above 60°C | 8 | Pitting corrosion reducing effective thickness by &gt;0.1 mm | Electropolishing surface finish (Ra &lt; 0.4 μm) with 25 μm PTFE coating for chemical resistance |

## 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**: **Pressure Testing System**, **Laser Cutting Machine**, **Hydraulic Press**  
**Downstream Applications**: Pressure Relief Valves, Chemical Reactor Safety Systems, Process Piping Assemblies  

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

### Q: What materials are available for dome rupture discs in chemical applications?
**A**: Dome rupture discs for chemical manufacturing are available in stainless steel, nickel alloy, graphite, and tantalum to withstand various corrosive environments and pressure requirements.

### Q: What are the main components in a dome rupture disc assembly?
**A**: The main components are the dome crown (the curved pressure-sensitive element) and the dome flange (the mounting structure that secures the assembly in the pressure system).

### Q: How does a dome rupture disc function in chemical pressure systems?
**A**: The dome's curved structure deforms under excessive pressure until it reaches its designed burst point, initiating rupture to safely relieve pressure and protect chemical processing equipment.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- EN 13445-3:2021 UNFIRED PRESSURE VESSELS - PART 3: DESIGN

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Dome](https://cnfx.com/industry/chemical-manufacturing/product/dome)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **2** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DOME | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 1b71c8e9
