---
title: "Inter-stage Transfer Pump/Piping"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:INTER_STAGE_TRANSFER_PUMPPIPING"
  data_integrity_hash: "90b79555e54b1fc96fd9854afb50d5b1"
  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:INTER_STAGE_TRANSFER_PUMPPIPING"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/inter-stage-transfer-pumppiping.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/inter-stage-transfer-pumppiping"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-2.5 bar absolute pressure, 60-95°C temperature, 5-25 m³/h flow rate"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.05
    unit: "bar"
    consequence: "Cavitation due to localized pressure falling below vapor pressure of concentrated liquid (approximately 0.03 bar at 60°C for 40% solids solution), creating vapor bubbles that implode at pump impeller causing pitting and vibration"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Inadequate preheating of concentrated liquid from previous stage, causing temperature drop below 65°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install temperature-controlled heat tracing on transfer piping with PID control maintaining 70-85°C"
  - node_2:
      trigger: "Solids concentration exceeding 45% w/w due to evaporator control failure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement inline refractometer with automatic dilution valve opening at 42% concentration threshold"
bom_nodes:
  transfer-pump:
    type: "part"
    urn: "URN:CNFX:ME:TRANSFER_PUMP"
    interface_type: "physical-logic-coupled"
  interconnecting-piping:
    type: "component"
    urn: "URN:CNFX:ME:INTERCONNECTING_PIPING"
    interface_type: "physical-logic-coupled"
  isolation-valve:
    type: "part"
    urn: "URN:CNFX:ME:ISOLATION_VALVE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 2858:2012 - END-SUCTION CENTRIFUGAL PUMPS (DESIGNATION, NOMINAL DUTY POINT AND DIMENSIONS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/inter-stage-transfer-pumppiping.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "436018ab04043be9a162be6b56c401ed53558a99c7ad8eaa3865f4d44c5fda2e"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Inter-stage Transfer Pump/Piping

## 1. Technical Definition
A system that transfers concentrated liquid between successive evaporation stages in a multi-stage vacuum evaporator train.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-2.5 bar absolute pressure, 60-95°C temperature, 5-25 m³/h flow rate**. Failure boundary: **Vapor pressure drop below 0.05 bar absolute at pump suction, causing net positive suction head available (NPSHa) &lt; net positive suction head required (NPSHr) by 0.3 m**, Mechanism: **Cavitation due to localized pressure falling below vapor pressure of concentrated liquid (approximately 0.03 bar at 60°C for 40% solids solution), creating vapor bubbles that implode at pump impeller causing pitting and vibration**.

### 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 |
| :--- | :--- | :--- | :--- |
| Inadequate preheating of concentrated liquid from previous stage, causing temperature drop below 65°C | 8 | Viscosity increase from 15 cP to &gt;45 cP, exceeding pump design limit and causing motor overload | Install temperature-controlled heat tracing on transfer piping with PID control maintaining 70-85°C |
| Solids concentration exceeding 45% w/w due to evaporator control failure | 8 | Crystallization at pipe elbows and pump volute, creating flow restriction and impeller imbalance | Implement inline refractometer with automatic dilution valve opening at 42% concentration threshold |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Transfer Pump](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/transfer-pump.md) `(Standalone System)`
- [Isolation Valve](https://cnfx.com/llms/industry/chemical-manufacturing/product/isolation-valve.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Vacuum Pump System**, **Heat Exchanger**, **Concentration Monitoring System**  
**Downstream Applications**: Concentrated Chemical Solutions, Evaporated Chemical Products, Purified Chemical Compounds  

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

### Q: What materials are recommended for inter-stage transfer pumps in chemical manufacturing?
**A**: Recommended materials include Stainless Steel (316L), Duplex Stainless Steel, and Hastelloy for corrosion resistance in handling concentrated chemical liquids.

### Q: Why is inter-stage transfer important in multi-stage vacuum evaporators?
**A**: Inter-stage transfer efficiently moves concentrated liquid between successive evaporation stages, maintaining vacuum conditions and optimizing energy use in the evaporation train.

### Q: What components are included in a typical inter-stage transfer system BOM?
**A**: A typical bill of materials includes interconnecting piping, isolation valves, and transfer pumps designed for handling concentrated liquids under vacuum conditions.

## 6. Manufacturing Compliance
- ISO 2858:2012 - END-SUCTION CENTRIFUGAL PUMPS (DESIGNATION, NOMINAL DUTY POINT AND DIMENSIONS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Inter-stage Transfer Pump/Piping](https://cnfx.com/industry/chemical-manufacturing/product/inter-stage-transfer-pumppiping)**

### 🌐 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**: INTER_STAGE_TRANSFER_PUMPPIPING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: bbb66442
