Three kilometres beneath the Arctic ice sheet, 12 m cantilever loading arms fold and unfold to connect 400-ton LNG hoses. The hydraulic actuators that drive these arms ride on rail linear systems that must withstand −45 °C cold starts, 350 bar surge loads, and 30-year salt-spray exposure without a single defrost cycle.
Structural beam conceptA 12 m cantilever uses an 80 mm × 80 mm super-duplex stainless-steel box beam internally ribbed and over-wrapped with 2 mm carbon-fiber...
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