Latest welding technology for storage and transportation facilities of liquified natural gas

Abstract

The need for storage and transportation facilities of liquefied natural gas have increased significantly because of global environmental regulations and recent shale gas innovation in North America. There is severe competition between Korea, Japan, and China for receiving manufacturing orders of LNG carriers or LNG storage tanks. Rationalization of the welding process used in the manufacturing of LNG facilities plays an important role in the above competition. This review paper presents the current global status and tendency for the development of latest welding technologies for LNG storage and transportation facilities. This article intends to present materials for raising the domestic competitive power for receiving manufacturing orders of LNG facilities.

Research for the Optimal Flux-Cored Arc Welding Process of 9% Nickel Steel Using Multi Object Optimization with Solidification Crack Susceptibility

“…Lee [ 9 ] researched the welding problem by the magnetization of 9% nickel steel. Kim [ 10 ] found that GMAW (gas metal arc welding) of 9% nickel steel improved the high temperature cracking susceptibility, but had a bad effect on the strength of the welded area. Saitoh [ 11 ] developed a high nickel-based steel with good toughness for cryogenic conditions.…”

A Study on the Algorithm of Quality Evaluation for Fiber Laser Welding Process of ASTM A553-1 (9% Nickel Steel) Using Determination of Solidification Crack Susceptibility

“…In addition, Lee [ 8 ] explains the problem of the welding part caused by the magnetization of 9% nickel steel, and predicts that the utilization of 9% nickel steel will increase through automation and overcoming the problem of the future welding process. Kim [ 9 ] et al reported that, when 9% nickel steel was welded by GMAW (gas metal arc welding), the high-temperature cracking susceptibility was good, but when the amount of heat input was increased, the strength of the welded portion decreased. When looking at the current status of research on the design and mechanical properties of cryogenic steel and A553-1 steel used to manufacture LNG storage tanks, Saitoh et al [ 10 ] developed a high Ni-based 9% Ni steel with excellent low-temperature toughness to ensure safety with LNG storage tanks.…”