The Challenges of LNG Materials Selection

02 January 2015
This paper provides an overview for the selection of the materials of construction for Liquefied Natural Gas liquefaction plants.
Some of the challenges are Inlet Gas processing to include acid gas removal, dehydration and mercury removal; refrigeration and liquefaction, and for utility units such as storage tanks, flare and vent stack, boil of gas compressors and other equipment. Necessarily being located on the coastline also dictates consideration for marine/offshore structures and equipment. Consideration is also given to the overall corrosion control of the plant, along with special considerations to avoid brittle fracture in low temperature applications.
The selection of optimum materials of construction plays an important role in major projects because it affects not only the initial capital investment, but also operational costs and profits.

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Benjamin S. Fultz
Chief, Materials Engineering Technology