无须常规维修的长输液氨管道的设计和管理

长输液氨管道的维修，由于受多种因素的制约，其困难非同一般。采用现代技术和科学管理相结合的办法，通过精心设计、严格施工、法制化管理，可保证管道在使用年限内（10～30年）长期不维修或大修，秦皇岛长输液氨管道运行10年的经验，值得借鉴。

Design and Management of the Long- Distance Piping for Transporting Liquid Ammonia without Routine Maintenance

Due to the limitation of different factors, the difficulty for the maintenance of long-distance piping of liquid ammonia transport is extraordinary. Maintenance free or overhaul free can be guaranted, combining modern techniques and scientific management, through perfect design, strict construction and lawful management within the long-period of the service life (10-30 years). The experience of the long-distance piping in Qinhuangdao for transporting the liquid ammonia, having been run for 10 years, can be used for reference.