---
title: "Soaking Drum"
industry: "Leather and Related Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SOAKING_DRUM"
  data_integrity_hash: "c81393f6ae3894da841a3c221d02522f"
  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:SOAKING_DRUM"
  data_source_uri: "https://cnfx.com/llms/industry/leather-and-related-product-manufacturing/product/soaking-drum.md"
  official_resource_url: "https://cnfx.com/industry/leather-and-related-product-manufacturing/product/soaking-drum"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.2-0.8 bar (20-80 kPa) internal pressure, 0.5-3.0 rpm rotational speed"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1.2
    unit: "bar"
    consequence: "Plastic deformation of AISI 304 stainless steel shell due to hoop stress exceeding 150 MPa yield strength, or bearing fatigue failure from Hertzian contact stress exceeding 1.2 GPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosion-induced wall thinning from pH&lt;3.0 tannin solutions"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "316L stainless steel cladding with 3 mm minimum thickness and quarterly ultrasonic thickness testing"
  - node_2:
      trigger: "Misalignment exceeding 0.1 mm/m between drum shaft and drive coupling"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Laser alignment during installation with 0.05 mm/m tolerance and quarterly vibration monitoring below 4.5 mm/s RMS"
bom_nodes:
  drum-shell:
    type: "component"
    urn: "URN:CNFX:ME:DRUM_SHELL"
    interface_type: "physical-logic-coupled"
  drive-motor-and-gearbox:
    type: "part"
    urn: "URN:CNFX:ME:DRIVE_MOTOR_AND_GEARBOX"
    interface_type: "physical-logic-coupled"
  manholedoor:
    type: "part"
    urn: "URN:CNFX:ME:MANHOLEDOOR"
    interface_type: "physical-logic-coupled"
  liquor-inletoutlet-ports:
    type: "component"
    urn: "URN:CNFX:ME:LIQUOR_INLETOUTLET_PORTS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/leather-and-related-product-manufacturing/product/soaking-drum.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "2de634c1ae55770ead730b0e4ec20b1d507459a60c8e3fc8788e581d3e6b0be4"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Soaking Drum

## 1. Technical Definition
A rotating drum used in leather processing to soak and rehydrate hides.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.2-0.8 bar (20-80 kPa) internal pressure, 0.5-3.0 rpm rotational speed**. Failure boundary: **1.2 bar internal pressure causing drum shell deformation exceeding 5 mm, or 5.0 rpm causing centrifugal force exceeding 500 N at drum periphery**, Mechanism: **Plastic deformation of AISI 304 stainless steel shell due to hoop stress exceeding 150 MPa yield strength, or bearing fatigue failure from Hertzian contact stress exceeding 1.2 GPa**.

### 2.1 Analytical Physics Model
Governed by the **Heat Sterilization F0 Lethality Model**:

> **Primary Equation**: $F_0 = \int_{0}^{t} 10^{(T-121.1)/z} dt$  
> **Engineering Impact**: Validates microbial reduction integrity for aseptic packaging.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| T | Process Temp (°C) | **$T \in [121-135]$ °C** (Per `temperature_range`) |
| t | Exposure Time (min) | Engineering Constant |
| z | Z-value | **10 °C** (Standard for *C. botulinum*) |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Corrosion-induced wall thinning from pH&lt;3.0 tannin solutions | 8 | Drum shell rupture at 0.9 bar internal pressure | 316L stainless steel cladding with 3 mm minimum thickness and quarterly ultrasonic thickness testing |
| Misalignment exceeding 0.1 mm/m between drum shaft and drive coupling | 8 | Gearbox bearing seizure at 2.5 rpm operation | Laser alignment during installation with 0.05 mm/m tolerance and quarterly vibration monitoring below 4.5 mm/s RMS |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Drive Motor and Gearbox](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-motor-and-gearbox.md) `(Standalone System)`
- [Manhole/Door](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/manholedoor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hide Fleshing Machine**, **Hide Dehairing Machine**, **Hide Splitting Machine**  
**Downstream Applications**: Finished Leather Hides, Leather Garments, Leather Accessories  

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

### Q: What is the primary function of a soaking drum in leather manufacturing?
**A**: A soaking drum rehydrates and cleans raw hides by rotating them in water or solutions, removing dirt, salt, and restoring moisture for further processing like tanning.

### Q: Why is stainless steel used for soaking drums?
**A**: Stainless steel resists corrosion from water and chemicals, ensures hygiene, and provides durability for long-term use in wet leather processing environments.

### Q: How does the drive motor and gearbox contribute to soaking drum operation?
**A**: The drive motor and gearbox control drum rotation speed, ensuring consistent tumbling of hides for uniform soaking and efficient rehydration without damage.

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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Soaking Drum](https://cnfx.com/industry/leather-and-related-product-manufacturing/product/soaking-drum)**

### 🌐 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**: SOAKING_DRUM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 1568979b
