In the expansion of Yanshan ethylene plant, the cold box was made at home, resulting in obvious social and economic benefit. The Piping design of cold box is introduced.

• 乙烯冷箱国产化具有显著的社会经济效益,其配管设计从管道布置,应力材料等方面统筹考虑,使国产化冷箱成功投产。