Steel Grating for Oil & Gas Offshore Platforms
Serrated hot-dip galvanized bar grating for offshore production platforms, FPSOs, drilling rigs, and topside structures. High corrosion resistance, anti-slip, and compliance with major offshore standards.
Standard Offshore Specification
Applicable Standards
Norwegian offshore standard for materials selection. Specifies hot-dip galvanized serrated grating for topside walkways and platforms.
Hot-dip galvanizing specification. Minimum average coating 55 μm for 3–6mm steel sections.
Bar grating specification. Serrated (I-series) designation for anti-slip surface.
Safe walking-working surfaces. Maximum 1-inch (25mm) opening in the least dimension for working surfaces.
Offshore Applications
- Production platform main decks
- Drill floor gratings
- FPSO accommodation decks
- Helideck perimeter walkways
- Subsea topside access bridges
- Escape route floors
- Module and equipment access platforms
- Jetty and loading arm walkways
Documentation Package
Offshore procurement typically requires the following documentation from the Anping factory:
- Material test certificate (MTC) — chemical composition and mechanical properties
- Galvanizing certificate — coating weight per m², test method, compliance to ISO 1461
- Dimensional inspection certificate
- Weld inspection report (visual, and MT/PT on request)
- Third-party verification (SGS / BV / DNV / LR) on request
FAQs
What grating specification is standard for offshore oil & gas platforms?
The most common offshore spec is 25×5mm serrated bearing bars at 30mm c/c pitch, 6mm round cross bar at 50mm pitch, hot-dip galvanized to ISO 1461. This meets NORSOK M-001 and most major operator standards. IP ratings and coating inspection certificates are typically required.
Why must offshore grating be serrated?
Sea spray, condensation, and hydrocarbon liquids create consistently wet surfaces on offshore structures. Serrated grating reduces slip risk on wet decks. Most operator HSE requirements mandate serrated grating on all offshore walkways and working platforms.
Can epoxy-coated grating replace hot-dip galvanized offshore?
Not typically. Hot-dip galvanizing provides a metallurgically bonded coating that resists impact damage and undercutting corrosion better than paint systems. For highly corrosive tropical offshore environments, some operators specify both galvanizing plus a topcoat of epoxy or polyurethane.
What documentation is required for offshore grating?
Typically: mill certificates (material grade), galvanizing certificate (coating weight), dimensional inspection certificate, and sometimes third-party verification (BV, DNV, LR, or SGS). Specify documentation requirements in your inquiry.