Marine Welded Steel Porthole
Introduction
Marine steel porthole has welded and bolted two types. Welded type is suitable for installed on steel vessels. Welded steel windows can ensure a better seal between the porthole and the hull.
Specifications of Marine Welded Steel Porthole
clear size D
D1
D2
D3
h
t
α
deadlight fasteners
frame fasteners
bulkhead opening size
200
245
204
250
155
10
45°
2
3
253
250
295
254
305
182
12
42°
2
3
308
300
350
304
360
207
15
31°
3
3
363
350
400
354
410
232
15
31°
3
3
413
400
450
404
460
257
19
31°
3
3
463