Study of Influence Factors of LNG Vacuum Insulated Double Wall Pipe Stress
The stress of a pipeline is influenced by various factors,including the basic parameters of the pipeline(such as pressure,temperature,pipe diameter,etc.)and external factors.This article selected pipe diameter and wall thickness for research,taking LNG vacuum insulated double wall as an example to calculate and analyze the stress of the inner and outer pipes of the double wall pipeline under different pipe diameters and wall thicknesses.The influence law of these two factors on pipeline stress was studied,and four combining schemes of inner and outer pipe diameters and wall thicknesses were obtained.Through stress analysis and comparison again,the optimal combining scheme of inner and outer pipe diameters and wall thicknesses of the double wall pipeline was preliminarily determined.This provides reference for subsequent pipeline design and layout optimization.
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