5G70ME-LGIP9.6
The MAN 5G70ME-LGIP9.6 is a 5‑cylinder, low‑speed 2‑stroke marine main engine delivering up to 34 350 kW at 91 rpm, featuring high‑pressure LPG injection for dual‑fuel operation and Tier III emissions compliance.
Engine Specifications
Inspector Detail
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Designation decoded
5-cylinder Green Ultra-Long-Stroke 700mm bore ME-LGIP Mark 9.6 — two-stroke main engine, electronically controlled, dual-fuel LPG liquid injection (propane/butane), for VLGC newbuildings
Background
ME-LGIP LPG variant of the ME platform. LPG liquid injection at 500-600 bar. Dual-fuel with pilot diesel. G-variant (Green Ultra-Long-Stroke) with S/B 4.65 — maximum efficiency at low speeds. The 700mm bore engine is one of the largest in the LGIP series. For VLGC — cargo as fuel. LPG heavier than air — detectors LOW-LEVEL. Flashpoint ~-104°C, LEL 2.1%. CO2 ~15-20% less than HFO. BN25-40. 5-cylinder: torsional vibrations critical, especially with Ultra-Long-Stroke.
Calculated metrics
Inspector checklist
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
Common Failure Modes
Expert tips
- 💡 LPG heavier than air — detectors at floor level, bilge ventilation vital for survival. Check lowest points first.
- 💡 VLGC cargo as fuel — observe IGC Code system boundaries. 700mm bore = high output, correspondingly large LPG volumes.
- 💡 5-cylinder G-Type (S/B 4.65): torsional vibration especially critical. Log operating restrictions and vibration measurements.
Related components
Classification & regulatory
IMO Tier II/III. IGC Code. IGF Code. SOLAS II-2. MARPOL Annex VI. Classification society requirements for dual-fuel LPG.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Other Cylinder Configurations 27
Components & Design
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Technical Data
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