What do you check during a ballast water tank inspection?

flowchart TD
    A[Select representative tanks] --> B[Check structural condition]
    B --> C[Inspect coating system]
    C --> D[Measure thickness if needed]
    D --> E[Verify drainage & access]
    E --> F[Review records]

• Purpose: verify structural integrity and corrosion protection effectiveness
• Scope: representative tanks selected by surveyor; overall survey required
• Structural: visible defects, corrosion, pitting, wastage, cracks, deformation
• Coating: condition of corrosion prevention system, adhesion, blistering, holidays
• Thickness: measurements when extensive corrosion found or required by Administration
• Drainage: pipes, valves, strainers clear and functional
• Access: ladders, platforms, lighting adequate
• Records: previous inspection reports, coating application data, thickness gauging history
• ESP Code: examination triggered by renewal/intermediate survey results
• IACS UR: Z101/Z102/Z72/Z10-3 govern examination of ballast tanks