BRINGING THE STRUCTURAL INTEGRITY OF ALLOY 36 (36 NICKEL) PIPES A STEP AHEAD FOR LNG TRANSPORTATION WITH CRYOGENIC PIPE IN PIPE READY FOR EPCI PROJECT PURPOSES

摘要

TECHNIP has successfully developed and qualified a technology of LNG transfer lines over moderate distances [1], based on Pipe in Pipe concept. The use of Alloy 36% Nickel material as the core of the technology allows designing straight lines, thereby suppressing expansion loops required by conventional stainless steel material. As a result of 36%Ni steels low coefficient of thermal expansion, the Technip LNG transfer systems can be buried or laid subsea like conventional pipelines and facilities separated by longer distances can be reliably connected, under more secure conditions. To convince operators of the operational reliability of the concept, Technip pushed further, a qualification program on structural integrity of the alloy 36 pipes, more than recommended by usual design and construction codes.