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Offshore Operation Facilities by Menglan Duan, Huacan Fang

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6.5. Construction and Corrosion of Submarine Pipelines

The construction of the submarine pipeline is a key element, following its design; the main parts of which are measurements positioning and taking off the pipe axis, production and processing of steel pipe, manufacturing, transportation, stacking and organization of supply pipe, plumbing, trenching, laying and pressure testing, commissioning of piping systems, and so on.
Measurement positioning of the pipeline’s location is the first step in construction; it is based on the design of the pipeline which determined the coordinates of the location. Through various measuring instruments and methods, the field position of the pipeline is set at the scene of the sea floor—also called taking off. ...

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