LNG低温管道保冷结构分析及保冷施工技术

Analysis on the Cold Insulation Structure and Construction Technique of the LNG Low-Temperature Pipe

摘要: 针对LNG管道保冷结构不合理，保冷效果差，冷损失量高、施工复杂难度大、安装时间长等难点，研究LNG管道保冷材料种类和性能特点，采用有限元法分析保冷结构和厚度的温度场分布规律，验证保冷结构的合理性，依照文中保冷施工工艺要求进行施工，为LNG管道保冷施工提供参考依据。

Abstract: Aiming at unreasonable cold insulation structure of LNG pipe, bad effect of cold insulation, high cold loss, complicated and difficult construction and long-time installation etc. difficulties, this paper studies types and performance characteristics of cold insulation material of LNG pipe. In the paper, finite-element method is used to analyze cold insulation structure and distribution regularities of temperature field of thickness and rationality of cold insulation structure is verified. Carrying out construction according to requirements for cold insulation construction technology in the paper will provide reference for cold insulation construction of LNG pipe.