---
title: "Main Hopper"
industry: "Other Transport Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:MAIN_HOPPER"
  data_integrity_hash: "8e4b2c59652858192593436724b18cf4"
  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:MAIN_HOPPER"
  data_source_uri: "https://cnfx.com/llms/industry/other-transport-equipment-manufacturing/product/main-hopper.md"
  official_resource_url: "https://cnfx.com/industry/other-transport-equipment-manufacturing/product/main-hopper"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-15 MPa (1-150 bar) at 15-35°C"
    unit: "L"
engineering_limits:
  max_safe_operating_point:
    value: 275
    unit: "MPa"
    consequence: "Stress corrosion cracking due to chloride ion concentration exceeding 25 ppm in propellant at temperatures above 60°C, following Arrhenius corrosion kinetics with activation energy of 75 kJ/mol"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic pressure loading at 0.5-15 MPa with frequency &gt;0.1 Hz exceeding 10^6 cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Post-weld heat treatment at 1050°C for 1 hour followed by rapid quenching to reduce residual stresses below 50 MPa"
  - node_2:
      trigger: "Electrochemical potential difference &gt;0.5 V between dissimilar metals (316L SS and Inconel 625) in propellant electrolyte"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dielectric isolation using PTFE gaskets with thickness &gt;3 mm and electrical resistance &gt;10^9 Ω·cm"
bom_nodes:
  hopper-body:
    type: "part"
    urn: "URN:CNFX:ME:HOPPER_BODY"
    interface_type: "physical-logic-coupled"
  discharge-cone:
    type: "component"
    urn: "URN:CNFX:ME:DISCHARGE_CONE"
    interface_type: "physical-logic-coupled"
  agitator-assembly:
    type: "device"
    urn: "URN:CNFX:ME:AGITATOR_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  level-sensor:
    type: "part"
    urn: "URN:CNFX:ME:LEVEL_SENSOR"
    interface_type: "physical-logic-coupled"
  access-hatch:
    type: "component"
    urn: "URN:CNFX:ME:ACCESS_HATCH"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/other-transport-equipment-manufacturing/product/main-hopper.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "254a55ccf35f629dd55dac11d1a5856193ea522234235b63455305cbca7a7175"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Main Hopper

## 1. Technical Definition
The primary storage and feeding vessel for propellant within a precision metering and charging system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-15 MPa (1-150 bar) at 15-35°C**. Failure boundary: **Material yield strength of 275 MPa (AISI 316L stainless steel) or 0.2% plastic deformation threshold**, Mechanism: **Stress corrosion cracking due to chloride ion concentration exceeding 25 ppm in propellant at temperatures above 60°C, following Arrhenius corrosion kinetics with activation energy of 75 kJ/mol**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cyclic pressure loading at 0.5-15 MPa with frequency &gt;0.1 Hz exceeding 10^6 cycles | 8 | Fatigue crack initiation and propagation at weld seams following Paris' Law with C=1.5e-12 and m=3.2 | Post-weld heat treatment at 1050°C for 1 hour followed by rapid quenching to reduce residual stresses below 50 MPa |
| Electrochemical potential difference &gt;0.5 V between dissimilar metals (316L SS and Inconel 625) in propellant electrolyte | 8 | Galvanic corrosion at flange connections with corrosion rate &gt;0.5 mm/year following mixed-potential theory | Dielectric isolation using PTFE gaskets with thickness &gt;3 mm and electrical resistance &gt;10^9 Ω·cm |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Hopper Body](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hopper-body.md) `(Standalone System)`
- [Agitator Assembly](https://cnfx.com/llms/industry/chemical-manufacturing/product/agitator-assembly.md) `(Standalone System)`
- [Level Sensor](https://cnfx.com/llms/industry/chemical-manufacturing/product/level-sensor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Precision Metering System**, **Automated Charging System**, **Propellant Filtration Unit**  
**Downstream Applications**: Solid Rocket Motors, Artillery Propellant Charges, Aerospace Ignition Systems  

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

### Q: What materials are available for the Main Hopper?
**A**: The Main Hopper is constructed from either Stainless Steel 316L for superior corrosion resistance or Aluminum Alloy for lightweight applications, both suitable for propellant handling in transport equipment manufacturing.

### Q: What are the key components in the Main Hopper BOM?
**A**: The Bill of Materials includes the Hopper Body, Access Hatch, Agitator Assembly to prevent bridging, Discharge Cone for controlled flow, and a Level Sensor for accurate propellant monitoring.

### Q: How does the Main Hopper integrate into a precision metering system?
**A**: As the primary storage and feeding vessel, it ensures consistent propellant delivery to downstream charging components via its discharge cone and agitator, maintaining system accuracy in transport equipment applications.

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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Main Hopper](https://cnfx.com/industry/other-transport-equipment-manufacturing/product/main-hopper)**

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

> **Reference ID**: MAIN_HOPPER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b496da0a
