---
title: "Sealing Flange"
industry: "Rubber and Plastic Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SEALING_FLANGE"
  data_integrity_hash: "ff0b9344ffb8f9742e99d586d6dfa29f"
  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:SEALING_FLANGE"
  data_source_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/sealing-flange.md"
  official_resource_url: "https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/sealing-flange"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-3.5 bar differential pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.2
    unit: "bar"
    consequence: "Elastomer compression set exceeding 15% permanent deformation at 70°C, causing seal interface gap formation &gt;0.05mm"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Autoclave sterilization cycle exceeding 134°C for &gt;18 minutes"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate PTFE thermal barrier layer with 0.25mm thickness between flange and stopper interface"
  - node_2:
      trigger: "Vial filling line vibration at 120Hz resonance frequency with amplitude &gt;0.1mm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement hexagonal anti-rotation flange geometry with 0.02mm interference fit tolerance"
bom_nodes:
  sealing-lip:
    type: "component"
    urn: "URN:CNFX:ME:SEALING_LIP"
    interface_type: "physical-logic-coupled"
  compression-zone:
    type: "component"
    urn: "URN:CNFX:ME:COMPRESSION_ZONE"
    interface_type: "physical-logic-coupled"
  transition-section:
    type: "component"
    urn: "URN:CNFX:ME:TRANSITION_SECTION"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5211:2017 - INDUSTRIAL VALVES - PART-TURN ACTUATOR ATTACHMENTS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B16.5:2020 - PIPE FLANGES AND FLANGED FITTINGS"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 1092-1:2018 - FLANGES AND THEIR JOINTS - CIRCULAR FLANGES FOR PIPES, VALVES, FITTINGS AND ACCESSORIES, PN DESIGNATED"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/sealing-flange.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "475f10559107ee6a640fed46f7b522a0426ac257db0d7c1966f3f0ab95a6a432"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Sealing Flange

## 1. Technical Definition
A specialized flange component designed to create a hermetic seal in pharmaceutical vial rubber stoppers.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-3.5 bar differential pressure**. Failure boundary: **4.2 bar differential pressure sustained for &gt;30 seconds**, Mechanism: **Elastomer compression set exceeding 15% permanent deformation at 70°C, causing seal interface gap formation &gt;0.05mm**.

### 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 |
| :--- | :--- | :--- | :--- |
| Autoclave sterilization cycle exceeding 134°C for &gt;18 minutes | 8 | Elastomer cross-link degradation reducing Shore A hardness from 50±5 to &lt;35 | Integrate PTFE thermal barrier layer with 0.25mm thickness between flange and stopper interface |
| Vial filling line vibration at 120Hz resonance frequency with amplitude &gt;0.1mm | 8 | Micro-slip displacement accumulating to 0.3mm radial misalignment over 10,000 cycles | Implement hexagonal anti-rotation flange geometry with 0.02mm interference fit tolerance |

## 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**: **Injection Molding Machine**, **Industrial Chiller**, **Hopper Dryer**  
**Downstream Applications**: Pharmaceutical Vial Rubber Stoppers, Medical Syringe Plungers, Diagnostic Test Kit Seals  

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

### Q: What materials are used in pharmaceutical sealing flanges?
**A**: Our sealing flanges are manufactured using pharmaceutical-grade elastomers such as bromobutyl rubber and silicone rubber, ensuring compatibility with medical applications and maintaining hermetic seals.

### Q: How does the three-part BOM design improve sealing performance?
**A**: The compression zone applies consistent pressure, the sealing lip creates the primary barrier, and the transition section distributes stress evenly - together ensuring reliable hermetic sealing in vial stoppers.

### Q: Are these sealing flanges suitable for sterile pharmaceutical applications?
**A**: Yes, these flanges are specifically designed for pharmaceutical vial stoppers, meeting stringent requirements for sterility, chemical resistance, and maintaining hermetic seals in medical packaging.

## 6. Manufacturing Compliance
- ISO 5211:2017 - INDUSTRIAL VALVES - PART-TURN ACTUATOR ATTACHMENTS
- ANSI/ASME B16.5:2020 - PIPE FLANGES AND FLANGED FITTINGS
- DIN EN 1092-1:2018 - FLANGES AND THEIR JOINTS - CIRCULAR FLANGES FOR PIPES, VALVES, FITTINGS AND ACCESSORIES, PN DESIGNATED

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Sealing Flange](https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/sealing-flange)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SEALING_FLANGE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 3c578612
