10" Ullage Hatch with 5" Coaming Height (Model #DB569-10-05A) - Painted Steel

The Model DB569-10-05A pairs rapid-access capabilities with an elevated structural barrier. By utilizing a 5" coaming height, the sealing face is lifted safely above deck level, preventing standing washdown runoff, mud, and sloshing seawater from pooling around the gasket track. This profile minimizes the risk of fluid contamination inside the space while allowing crew members to perform depth sounding, sampling, or tank inspections efficiently.

Intended Use Cases:

• Exposed Weather Decks: Ideal for open decks, foredecks, or work zones prone to heavy seawater spray and standing washdown runoff where a raised boundary is required.
• Sounding & Ullage Readings: Ideal for quick-access monitoring of liquid cargo levels, fuel oil storage, or ballast levels using standard sounding tapes.
• Tank Sampling & Expanded Inspection: The larger 10" clear opening allows swift personnel entry for fluid sampling or drop-light inspections of inner tank conditions with expanded visibility compared to standard 8" models.
• Emergency Venting Ports: Serves as a manual venting access point during tank loading, discharging, or cleaning operations.

Primary Industries & Vessel Types:

• Inland & Coastal Barges: Heavily utilized on the deck flats or primary hatches of liquid cargo barges, tank vessels, and bunkering lines.
• Commercial Fishing & Processing Ships: Built to withstand constant washdowns, heavy impacts, and organic tracking found on active processing decks.
• Commercial Workboats & Tugboats: Standard equipment for fuel oil tank tops and dry void monitoring points on active fleet transport hulls.
• Offshore Support Vessels (OSVs): Perfect for auxiliary tank access where rapid, repeated checks are required by the deck crew.

• Raised Coaming Protection: Features a 5" elevated vertical frame wall that acts as a natural structural barrier against pooling water, mud, and deck debris.
• 10" Expanded Clear Opening Layout: Sized at a generous 10" diameter to comfortably accommodate larger inspection tools, sounding lines, and sampling canisters.
• Heavy-Duty Structural Steel: Fabricated from thick, high-tensile structural steel to prevent cover deformation and survive severe impact on commercial work decks.
• Buna-N Chemical-Resistant Gasket: Features a premium Buna-N (Nitrile) rubber gasket track providing excellent sealing performance and broad resistance to fuels, oils, and marine chemicals.
• Universal Shipyard Finish: Arrives shot-blasted and coated with a universal shipyard primer (painted), making the assembly completely ready for immediate welding and final coating at the shipyard.

• Qualified Personnel Requirement: Installation of the 10" raised ullage hatch must be performed by qualified marine welders or fitters in accordance with applicable classification society standards (ABS, DNV, Lloyd's).
• Surface Preparation & Alignment: The 5" raised coaming must be perfectly aligned over a clean deck cutout and securely welded to prevent thermal warping or twisting of the perimeter sealing seat during fabrication.
• Latching Alignment & Check: Following structural welding, verify that the locking mechanism articulates smoothly and that the cover seats evenly across the entire frame.
• Debris Inspection: Prior to closing, ensure that the gasket track, coaming rim, and latch catches are completely free of weld spatter, slag, rust, or heavy topcoat accumulation.