The setting
Gas production platform in Southeast Asian waters. The helideck and connecting walkways sit exposed to salt spray, tropical sun, and helicopter exhaust around the clock. Corrosion here isn't just an engineering inconvenience — it's a safety-critical inspection item with regulatory requirements attached. Every maintenance dollar spent carries a logistics cost multiplier because getting people and gear offshore isn't cheap.
What was going wrong
The steel grating on the helideck and adjacent walkways was triggering mandatory close-visual inspections every six months. Each inspection required a rope access team on-site for several days — weather-dependent, expensive, and operationally disruptive. Adding up the rope access contractor fees, the platform supply vessel days, and the engineering hours consumed, the corrosion inspection regime was burning approximately $180,000 per year. And the grating still needed full replacement every few years on top of that.
What we installed
The helideck got fire-rated phenolic panels that meet offshore HSE requirements without any surface coating. The connecting walkways were done with UV-stabilised pultruded sections formulated for continuous salt spray exposure. Both materials are inherently corrosion-proof — the salt air that drove the steel inspection regime doesn't affect them. The weight came in substantially under the steel they replaced, which mattered for the helideck's structural load budget.
What changed
Bottom line: The six-monthly rope access corrosion inspection is no longer required for the FRP sections. That's $180,000 per year that stays in the operations budget. The phenolic helideck grating passed its first fire integrity survey with zero observations.
$180k/year saved in suspended access inspection costs. Fire-rated phenolic grating passed regulatory fire survey with no findings.
How it compares
Steel grating offshore demands a continuous inspection and coating cycle to stay compliant — rope access teams, supply vessel logistics, and eventual full replacement. The phenolic FRP alternative carries a higher initial procurement cost, but the inspection cost alone pays it back. After two years, the steel option has already cost more, and the FRP hasn't required a single inspection-related intervention.
If you're looking at replacing metal in an environment that actively destroys it, see our metal replacement strategy overview. More offshore applications are covered in walkway systems for marine and offshore environments.