---
title: "Hydraulic Piston"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HYDRAULIC_PISTON"
  data_integrity_hash: "e17eedb4007d8ce8c49c4f6bfa79fef5"
  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:HYDRAULIC_PISTON"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-piston.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hydraulic-piston"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-70 MPa (150-700 bar)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 85
    unit: "MPa"
    consequence: "Plastic deformation of piston material (316L stainless steel, yield strength 170 MPa) due to pressure exceeding design limits, or seal extrusion failure when pressure exceeds HNBR material's 75 MPa extrusion resistance"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant particle &gt;5 μm in hydraulic fluid"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 3 μm absolute filtration with differential pressure monitoring"
  - node_2:
      trigger: "Water content &gt;1000 ppm in hydraulic fluid"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement vacuum dehydration system maintaining &lt;500 ppm water content"
bom_nodes:
  piston-head:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_HEAD"
    interface_type: "physical-logic-coupled"
  piston-rod:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_ROD"
    interface_type: "physical-logic-coupled"
  piston-seals:
    type: "component"
    urn: "URN:CNFX:ME:PISTON_SEALS"
    interface_type: "physical-logic-coupled"
  wear-rings:
    type: "component"
    urn: "URN:CNFX:ME:WEAR_RINGS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ANSI/NFPA T3.6.7 R1-2015: FLUID POWER - CYLINDERS - BORE AND ROD AREA RATIOS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-piston.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "676aab13e476f69cc8b85ca785f090cc2863ae310769197e71a9a359f1f99492"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Hydraulic Piston

## 1. Technical Definition
A hydraulic actuator component that converts hydraulic pressure into linear mechanical force within an annular preventer.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-70 MPa (150-700 bar)**. Failure boundary: **Material yield strength exceeded at 85 MPa (850 bar) for 316L stainless steel, or seal extrusion at 75 MPa (750 bar) for HNBR seals**, Mechanism: **Plastic deformation of piston material (316L stainless steel, yield strength 170 MPa) due to pressure exceeding design limits, or seal extrusion failure when pressure exceeds HNBR material's 75 MPa extrusion resistance**.

### 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 |
| :--- | :--- | :--- | :--- |
| Contaminant particle &gt;5 μm in hydraulic fluid | 8 | Seal scoring and hydraulic fluid leakage | Install 3 μm absolute filtration with differential pressure monitoring |
| Water content &gt;1000 ppm in hydraulic fluid | 8 | Corrosion pitting on piston surface leading to seal failure | Implement vacuum dehydration system maintaining &lt;500 ppm water content |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Hydraulic Fluid Filtration System**, **Hydraulic Pressure Testing Bench**  
**Downstream Applications**: Annular Blowout Preventer, Hydraulic Ram BOP, Subsea Well Control System  

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

### Q: What materials are used in this hydraulic piston for maximum durability?
**A**: This hydraulic piston is constructed from high-strength alloy steel with chrome-plated steel surfaces and stainless steel components where corrosion resistance is critical, ensuring longevity in demanding machinery applications.

### Q: How does this hydraulic piston convert pressure to mechanical force in annular preventers?
**A**: The piston acts as a hydraulic actuator within the annular preventer system, where hydraulic pressure applied to the piston head creates linear mechanical force through the piston rod, enabling precise control of sealing elements in blowout prevention equipment.

### Q: What maintenance considerations are important for hydraulic piston seals and wear rings?
**A**: Regular inspection of piston seals and wear rings is essential to prevent hydraulic fluid leakage and maintain optimal performance. These components should be checked during routine maintenance and replaced when showing signs of wear or damage to ensure system integrity.

## 6. Manufacturing Compliance
- ANSI/NFPA T3.6.7 R1-2015: FLUID POWER - CYLINDERS - BORE AND ROD AREA RATIOS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Hydraulic Piston](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hydraulic-piston)**

### 🌐 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**: HYDRAULIC_PISTON | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 07b4feb2
