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DF-464-5+144
DF-464-5/144 BUILT-UP HATCH
Double layered combined marine hatch cover with upper and lower layers
This product is designed with a double-layer combination of upper and lower hatch covers, with a double-layer stacked sealing structure. Compared with traditional single-layer hatch covers, it has upgraded waterproof, windproof, pressure bearing, and compartment protection performance, and can flexibly adapt to various complex operating conditions of ships.
Domestic/international real ship usage scenarios
◎ Multi purpose general cargo ships and bulk carriers: double-layer layered sealing on top and bottom, mixed dry and wet cargo, layered compartment protection, suitable for complex freight conditions
◎ Container feeder ships and special engineering ships: upper layer rainproof and windproof, lower layer load-bearing compartments, taking into account deck cargo stacking and cabin protection
◎ Inland river barges, offshore work vessels, and ocean platforms: flexible adaptation to high and low working conditions, and space saving stacking and storage on narrow decks
◎ Second hand ship renovation, old hatch upgrade: The double-layer composite structure does not require significant changes to the hull, allowing for quick replacement of old single-layer hatch covers
Global Southeast Asia, Middle East, and Europe inland shipping and ocean bulk shipping routes are extensively used in conjunction with each other
The DF-464-5/144 BUILT-UP HATCH follows imperial units (inches/pounds) for global compatibility, with the following critical specifications:
Model Number | Dimension A | Dimension B | Dimension C | Diameter (ΦD) | Weight (WT.) |
DF-464-5/144 | 24 1/4'' | 18 1/4'' | 5'' | 7 1/2'' | 134 lbs |
Every DF-464-5/144 hatch is composed of 9 essential parts, each chosen for durability and functional performance:
Part Name & Specification | Quantity | Material |
Cover | 1 | Steel |
Coaming | 1 | Steel |
Gasket | 1 | Neoprene (weather-resistant) |
Dog Handle | 6 | Cast Iron |
Tumble Bolt | 6 | Bronze (corrosion-resistant) |
Small Cover | 1 | Steel |
Small Coaming | 1 | Steel |
Small Gasket | 1 | Neoprene |
Arm | 1 | Cast Steel |
Structural advantage
The combination of upper and lower double hatch covers, with double-layer wind and rain tight sealing, layered load-bearing, and double-layer protection, is suitable for more special loading and unloading, wet and dry mixing, high and low water levels, and harsh sea conditions scenarios, greatly improving the versatility and safety compared to single-layer hatch covers
✅ Core advantages of the product
Double layered composite structure: independent sealing with upper and lower covers, layered load-bearing, higher wind and rain tightness level, stable and durable in harsh ocean conditions
Wide adaptability to various scenarios: bulk carriers, multi-purpose ships, general cargo ships, inland river barges, and ocean engineering ships can all be used interchangeably
Self owned source factory: no intermediary price difference, supports non-standard customization of hatch size, plate thickness, sealing configuration, and opening method
Classification society certified steel manufacturing, corrosion-resistant and wave resistant, with a long service life and lower maintenance costs
Stacking storage saves deck space, with convenient loading and unloading operations, and is compatible with various operation modes such as port lifting and hydraulic opening and closing
✅ Applicable ships and routes
Widely used in major shipping regions around the world, including ocean bulk carriers, offshore multi-purpose work vessels, inland waterway cargo barges, ship retrofitting and upgrading, and offshore platform support
✅ Factory customization service
One on one drawing design, specification adjustment as needed, material customization, sealing system upgrade, bulk stock+urgent customization orders, long-term undertaking of global shipowner and shipyard foreign trade bulk orders
