According to the pipeline drawing, each section of the pipeline using high vacuum multi-layer winding insulation, cold preservation effect is good. Each pipeline adopts spot butt welding connection or flanged connection, which is convenient for installation and maintenance and can save a lot of installation work and installation cost. Adopting reasonable compensation structure, excellent technical index, stable performance, reliable operation, beautiful appearance, long service life, scientific treatment of pipeline, smooth surface, beautiful, corrosion-resistant, plus clever connection, the utility model can greatly extend the service life of the pipeline.