NM-D-12
Normanship NM-D-12 — Davit-Launched Inflatable Liferaft for international navigation vessels.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Visual inspection of fabric, seams, and valves for damage, corrosion, or wear
Pressure retention test (60-minute pressure hold with minimum 95% retention after temperature/pressure correction)
Soapy water test of all valves for leak detection
Integrity check of seams connecting floor to buoyancy tube (slippage, rupture, edge lifting)
Annual Hydrostatic Release Unit (HRU) validity verification and replacement if expired
Working-pressure leakage test of inflation hoses and systems
NAP (Non-Atmospheric Pressure) test at 11 years and annually thereafter for micro-defect detection
Gas inflation stress test (GI) every 5 years using the liferaft's own CO2 cylinder
Type-general inspection and maintenance points for this equipment category — not model-specific.
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