---
title: "Overflow Weir/Drain"
industry: "Food Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:OVERFLOW_WEIRDRAIN"
  data_integrity_hash: "acbd34cbcd6c1b77eb9d86122c8d11b0"
  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:OVERFLOW_WEIRDRAIN"
  data_source_uri: "https://cnfx.com/llms/industry/food-manufacturing/product/overflow-weirdrain.md"
  official_resource_url: "https://cnfx.com/industry/food-manufacturing/product/overflow-weirdrain"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-1.5 m liquid head, 0-60°C fluid temperature, 0-2 m/s flow velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 304
    unit: "stainless"
    consequence: "Stress corrosion cracking from chloride ion concentration &gt;25 ppm at &gt;60°C; fatigue failure from cyclic loading exceeding 10^6 cycles at 100 MPa stress amplitude"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Chloride ion concentration exceeding 25 ppm in wash solution at temperatures above 60°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Replace 304 stainless steel with 316L grade (2.5% molybdenum content) for chloride resistance; implement post-weld annealing at 1050°C followed by rapid quenching"
  - node_2:
      trigger: "Cyclic pressure fluctuations exceeding ±0.3 bar at frequencies above 5 Hz from pump pulsations"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement radius transitions ≥5 mm with surface finish Ra ≤1.6 μm; add pulsation dampener with 2:1 pressure reduction ratio upstream"
bom_nodes:
  weir-plate:
    type: "component"
    urn: "URN:CNFX:ME:WEIR_PLATE"
    interface_type: "physical-logic-coupled"
  drain-valve:
    type: "part"
    urn: "URN:CNFX:ME:DRAIN_VALVE"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/food-manufacturing/product/overflow-weirdrain.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d1fedd6a8f2d85478a30a7b713421033dd3ef7591b2c9c185472b197b03a4b5c"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Overflow Weir/Drain

## 1. Technical Definition
A combined overflow and drainage component for stainless steel washing tanks that regulates liquid level and facilitates drainage.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-1.5 m liquid head, 0-60°C fluid temperature, 0-2 m/s flow velocity**. Failure boundary: **304 stainless steel yield strength of 205 MPa at 20°C, 170 MPa at 100°C; cavitation threshold at vapor pressure of 0.023 bar at 20°C**, Mechanism: **Stress corrosion cracking from chloride ion concentration &gt;25 ppm at &gt;60°C; fatigue failure from cyclic loading exceeding 10^6 cycles at 100 MPa stress amplitude**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Chloride ion concentration exceeding 25 ppm in wash solution at temperatures above 60°C | 8 | Intergranular stress corrosion cracking initiating at weld heat-affected zones | Replace 304 stainless steel with 316L grade (2.5% molybdenum content) for chloride resistance; implement post-weld annealing at 1050°C followed by rapid quenching |
| Cyclic pressure fluctuations exceeding ±0.3 bar at frequencies above 5 Hz from pump pulsations | 8 | High-cycle fatigue failure initiating at sharp radius transitions (&lt;3 mm) in weir geometry | Implement radius transitions ≥5 mm with surface finish Ra ≤1.6 μm; add pulsation dampener with 2:1 pressure reduction ratio upstream |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Drain Valve](https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/drain-valve.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Stainless Steel Washing Tank**, **Industrial Water Pump**, **Liquid Level Sensor**  
**Downstream Applications**: Washed Vegetables, Cleaned Meat Products, Sanitized Food Containers  

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

### Q: What is the difference between 304 and 316 stainless steel for this overflow weir/drain?
**A**: 304 stainless steel offers excellent corrosion resistance for most food manufacturing applications, while 316 stainless steel provides superior resistance to chlorides and acids, making it ideal for environments with harsh cleaning chemicals or salty products.

### Q: How does this overflow weir/drain regulate liquid levels in washing tanks?
**A**: The weir plate creates a controlled overflow point that maintains consistent liquid levels, while the integrated drain valve allows for complete drainage when needed, ensuring optimal washing efficiency and preventing overflow accidents.

### Q: What maintenance is required for this overflow weir/drain system?
**A**: Regular inspection for debris buildup, periodic cleaning of the weir plate and drain valve, and checking mounting flange seals are recommended. The stainless steel construction minimizes corrosion, but visual inspections should be part of routine equipment maintenance schedules.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Overflow Weir/Drain](https://cnfx.com/industry/food-manufacturing/product/overflow-weirdrain)**

### 🌐 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**: OVERFLOW_WEIRDRAIN | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a288650e
