A-Frame Apex Platework Corrosion Analysis

ALATAS’ SERVICEENGINEERING
LOCATION  EUROPE / NETHERLANDS / SOUTHERN NORTH SEA
EQUIPMENT  OFFSHORE CRANES / ROPE LUFFING PEDESTAL CRANE
BRANDLIEBHERR BOS 40/1200

INTRO

The client commissioned Alatas to conduct a detailed analysis of their asset crane A-frame apex plate work following non-destructive testing (NDT) inspections, which revealed areas with excessive material loss.

BACKGROUND

On-site NDT inspections were carried out on the side plates where the sheave is mounted to assess the current condition of the steel. Due to prolonged exposure to harsh environmental conditions, the steel has degraded over time, resulting in a reduction in material thickness beyond permissible limits. This necessitated an engineering assessment to understand how corrosion is affecting the crane’s lifting capacity.

ALATAS’ SOLUTION

To evaluate the structural capacity of the steelwork, Alatas engineers modeled the platework in both its original and corroded states using available manuals and data. Both models underwent analysis using Finite Element Analysis (FEA) software, simulating design loadings equivalent to those exerted by the luffing system. Stress outputs for both scenarios were analyzed, leading to the conclusion that stresses remained within design code allowances, indicating that corrosion would not impair the crane’s capacity in the future.

JOB SCOPE

  • Review inspection reports, crane data, and manuals.
  • Create CAD models of the platework in its original condition.
  • Model the plate work in its corroded state based on inspection findings.
  • Conduct FEA analysis for both original and corroded conditions.
  • Evaluate stress outputs using FEA analysis software.
  • Generate a comprehensive report outlining methodology, findings, and recommendations.
Search

Share Article

Recent Posts

Scroll to Top