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Collapse of thick pipes (D/t<20), phase II

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Ana Paula França de Souza Ana Paula França de Souza
Principal Pipeline Engineer, PM

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JIP - Collapse of thick pipes (D/t<20), phase II

Challenge

Thick-walled pipes  are difficult to manufacture and only a limited number of pipe mills and pipe-lay vessels can produce and lay them respectively. Besides that, heavy pipes are more difficult to handle and weld and require costly buckle arrestors.

Solution

In the JIP Collapse Phase 1, the pure collapse limit state equation was optimized through a combination of numerical and experimental tests. In Phase 2, using the same methodology, DNV GL will  address the DNV-OS-F101 combined load limit state equation for installation design.

Benefits

Establish a guideline for wall-thickness design with more robust and optimized DNV-OS-F101 limit state combined load criteria.

Value

Optimization of the wall-thickness design leading to it being feasible to install pipelines in ultra-deep waters, which is the main challenge for operators and contractors.