Heavy Marine Porthole

 Marine Porthole

  • Heavy Marine Porthole
Heavy Marine Porthole

Heavy Marine Porthole

  • Product description: Heavy Marine Porthole has inboard hinged cover anti wave. Deadlights side with rubber seals, tightly pressed by the bolt to keep watertight.
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Heavy Marine Porthole

Porthole is installed in the shipboard plates, superstructure and deck outdoor wall, on the hull of ship, can ensure the hull tightness, round window with anti-storm performance. Ship portholes reason are designed into round, according to the principle of mechanics, circular than other shapes more under pressure, shear stress.

Heavy porthole has inboard hinged cover anti wave. Deadlights side with rubber seals, tightly pressed by the bolt to keep watertight. Watertight bearing capacity of heavy porthole 200Pa below.

The installation position of porthole according to the anti-sinking ability of ships. Heavy pothole install on the bulkhead deck or below freeboard deck, above the full load waterline where allow open side hole, and required of watertight and airtight places.



type D D1 D2 D3 D4 D5 h t α bolts Opening
A SB 200 245 204 250 350 310 155 10 45° M16 8 253
250 295 254 305 400 364 182 12 48° M16 8 308
300 350 304 355 450 414 207 15 31° M16 12 363
350 400 354 410 500 464 232 15 31° M16 12 413
400 450 404 460 550 541 257 19 31° M16 12 463

TYPE D D2 D3 D4 D5 h t α bolts opening
A NB 200 204 250 350 310 155 10 45° M16 8 253
250 254 305 400 364 182 12 42° M16 8 308
300 304 355 450 414 207 15 31° M16 12 363
350 354 410 500 464 232 15 31° M16 12 413
400 404 460 550 514 257 19 31° M16 12 463

type D D1 D2 D3 h t α gmax deadlight frame opening
A LW RW 200 245 204 250 155 10 45° 50 2 3 253
250 295 254 305 182 12 42° 47.5 2 3 308
300 350 304 360 207 15 31° 45 3 3 363
350 400 354 410 232 15 31° 45 3 3 413
400 450 404 460 257 19 31° 45 3 3 463

type D D1 D2 D3 h t α gmax deadlight frame opening
A SW 200 245 204 250 155 10 45° 50 2 3 253
250 295 254 305 182 12 42° 47.5 2 3 308
300 350 304 360 207 15 31° 45 3 3 363
350 400 354 410 232 15 31° 45 3 3 413
400 450 404 460 257 19 31° 45 3 3 463

type D D2 D3 h t α gmax deadlight opening
A NW 200 204 250 155 10 50 2 253
250 254 305 182 12 47.5 2 308
300 304 360 207 15 31° 45 3 363
350 354 410 232 15 31° 45 3 413
400 404 460 257 19 31° 45 3 463