---
type: "product_component"
title: "Forged Steel Flange"
industry: "Metal Forging, Pressing, Stamping"
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attributes:
  pressure_rating:
    status: "config-dependent"
    typical_range: "1.5-3.0 bar"
    unit: "bar"
  temperature_rating:
    status: "config-dependent"
    typical_range: "121-135 °C"
    unit: "°C"
engineering_limits:
  max_safe_operating_point:
    value: 620.5
    unit: "MPa"
    consequence: "Stress concentration at bolt holes exceeding ASTM A105 material yield strength due to Von Mises stress criteria"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Bolt torque exceeding 475 N·m (350 ft-lb) on 1-inch bolts"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Torque sequence control with 90-100-110% progressive tightening"
  - node_2:
      trigger: "Thermal cycling between -29°C and 260°C exceeding 1000 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Post-weld heat treatment at 593°C for 1 hour per ASME B16.5"
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manufacturing_compliance:
url: "https://cnfx.com/llms/industry/metal-forging-pressing-stamping/product/forged-steel-flange.md"
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  contract_standard: "ERC-721-Industrial"
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    - "carbon steel forged steel flange"
    - "high pressure forged steel flange"
    - "stainless steel industrial flange"
    - "forged steel flange specifications"
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    - "Forged Steel Flange in "
    - "China Forged Steel Flange manufacturer"
    - "Forged Steel Flange supplier China"
    - "Forged Steel Flange pressure_rating"
    - "Forged Steel Flange temperature_rating"

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version: "3.3.5-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Forged Steel Flange

## 1. Technical Definition
Metal ring connecting pipes, valves, or equipment

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-413.7 bar (6000 psi) at 38°C**. Failure boundary: **Yield strength exceeded at 620.5 MPa (90 ksi) or 0.2% permanent deformation**, Mechanism: **Stress concentration at bolt holes exceeding ASTM A105 material yield strength due to Von Mises stress criteria**.

### 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 |
| :--- | :--- | :--- | :--- |
| Bolt torque exceeding 475 N·m (350 ft-lb) on 1-inch bolts | 8 | Flange face warping creating 0.05 mm gap | Torque sequence control with 90-100-110% progressive tightening |
| Thermal cycling between -29°C and 260°C exceeding 1000 cycles | 8 | Microcrack propagation at weld neck junction reaching 2 mm depth | Post-weld heat treatment at 593°C for 1 hour per ASME B16.5 |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| pressure_rating | Config-dependent | bar | Verified |
| temperature_rating | Config-dependent | °C | Verified |

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Press**, **Induction Heating System**, **CNC Machining Center**  
**Downstream Applications**: Pipeline Systems, Pressure Vessels, Industrial Valves  

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

### Q: What are the main materials used in forged steel flanges?
**A**: Forged steel flanges are typically manufactured from carbon steel, stainless steel, or alloy steel, each offering different properties for corrosion resistance, strength, and temperature tolerance.

### Q: What pressure classes are available for forged steel flanges?
**A**: Forged steel flanges come in various pressure classes (e.g., 150, 300, 600, 900, 1500, 2500) to meet different industrial requirements for high-pressure piping systems.

### Q: How do I determine the correct forged steel flange specifications for my application?
**A**: Key specifications include nominal diameter, bolt circle diameter, number of bolt holes, flange thickness, and pressure class. Consult industry standards like ASME B16.5 and consider your system's pressure, temperature, and material compatibility requirements.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Forged Steel Flange](https://cnfx.com/industry/metal-forging-pressing-stamping/product/forged-steel-flange)**

### 🌐 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**: FORGED_STEEL_FLANGE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 4eee8ec7