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However, choosing these options may require clamping to pull the pipeline that can cause a heavy mooring system and high risk associated with a very long stinger subject to hydrodynamic forces. On these types of vessels, the pipe is laid one section at a time, in an assembly-line method.
Pipe being lowered into the water via a stinger for S-lay installation Source: McDermott said on Tuesday that the modifications of the Amazon include a new J-Lay system that would allow the vessel to install hex-joints up to 24 inches in diameter. Only performed in shallow-water installations, the sea floor must be soft and flat for this type of installation.
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