DNV Nitrogen Purged Containers

DNV Nitrogen-Purged Containers
Design and verification of offshore transport units in accordance with DNV 2.7-3, supporting the safe transport of high-value power generation equipment to offshore installations.

Project Overview

Design of two portable offshore units (POUs) for a UK supplier of nitrogen-purged transport systems, intended for use in critical offshore environments.

Scope of Work

Concept & Definition

• Concept development and configuration studies
• Risk assessment
• Load case definition in accordance with DNV 2.7-3, including:
  • 4-point and 2-point lifting
  • Forklift handling
  • Transport and set-down
  • Drop events

Structural Analysis & Verification

• Four static FEA studies, each with six sub-models
• Analytical calculations for:
  • Bolted joints
  • Pressure containment
  • Lifting sets and lifting points
• Three dynamic FEA studies for drop assessment:
  • Modal analysis
  • Time-history response
  • Non-linear impact simulation

Detailed Engineering

• Complete 3D CAD models
• Manufacturing and general arrangement drawings
• Handling documentation and O&M manual
• Technical file for certification

Outcome

• Shared primary structure across both POU variants
• Interchangeable upper and lower sections for safe equipment change-out and storage
• Full demonstration of compliance with DNV 2.7-3