关键词: LNG, 硬质保冷材料, 柔性保冷材料, PIR, 泡沫玻璃, 二烯烃, 丁腈橡胶

Abstract: Based on the engineering design and construction experience of using hard and flexible cold insulation materials for pipeline cold insulation in a LNG terminal, the differences of their heat insulation performance are comprehensively compared, and the structural design principle and construction characteristics are studied, which provides the design basis for the engineering application of deep cooling pipeline cold insulation materials. Flexible cold insulation materials are superior to hard cold insulation materials in structural design and construction efficiency, and it is more convenient for construction and maintenance of special-shaped parts such as flanges and valves. For large-diameter pipelines, the hard cold insulation materials are more suitable. The effect of cold insulation materials depends on the construction quality. Engineering designers should pay more attention to the design of cold insulation structure, the third-party certification of material performance and the quality control and supervision of construction process.

Key words: LNG, hard cold insulation material, flexible cold insulation material, foam glass, dienes, NBR