The 40–80% price gap over onshore units buys five things: hazardous-area layout, C5-M coating, seawater cooling, tilt validation and the document chain.
- Place machines in safe areas with pressurised rooms rather than fully Ex machines where possible.
- C5-M coating: zinc-rich epoxy + epoxy MIO + PU topcoat, 250–400 μm DFT.
- Seawater side: titanium or 90/10 CuNi tubes, 1.0–1.5 m/s velocity.
- Validate oil level and return at 15° static / 22.5° dynamic heel.
- Submit the full document chain: design, compliance, materials, FAT.
Full engineering article in Chinese; we confirm area classification and coating scope at quotation.