Research on Welding Management Practice of X70 Pipeline Steel at LNG Terminal
X70 pipeline steel is a low-carbon or even ultra-low-carbon microalloyed high-strength pipeline steel,which has been widely used in China as a pipeline for transporting oil and natural gas,especially as the main pipe material for high-pressure export pipelines in LNG terminals.It has been widely used.This paper summarizes the welding management practice of X70 high-pressure pipeline in the first phase expansion project of a LNG receiving station,focusing on the control points of the X70 pipeline steel welding process from the aspects of pipe materials,welding materials,welding process qualification production,and welding process management.
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