
Marine Ship Use Various Sizes Steel Manhole Cover. Marine Grade Certification: Meets ISO5894 standard with UL, CE, SGS, and ISO9001-2008 certifications. High Strength & Durability: Steel construction with corrosion resistance, UV resistant neoprene gasket, and watertight/oiltight design. Multiple Design Options: Available in raised coaming, flush screw-down, and sunk models to prevent snagging. Full Customization Support: OEM/ODM services available with customization from samples, designs, or full custom requirements. Versatile Ship Application: Suitable for oil tanks, water tanks, cofferdams, and cabinets on ships and marine engineering. Strict Quality Control: 100% visual inspection of finished products by dedicated QA/QC inspectors. Fast Sample Delivery: Free samples available with shipment within 3-5 days (freight paid by buyer). Global Export Experience: Exported to nearly 70 countries with 6 years of export experience.