The discussion of several neglectful questions on the construction design of heavy-calibre nodular-graphite cast-iron pipe

With the experiences of design and construction from some water-supply pipework projects as examples,combined the experiences on the long-time management of the municipal water-supply pipeline,this paper points out the several neglectful questions on the construction design of heavy-calibre nodular-graphite cast-iron pipe such as the pipeline interface form,the horizontal or vertical spanning form of the intersection between water supply pipelines and other pipelines.The solutions and experiences are then concluded to facilitate the future construction,improve the construction quality and reduce the construction costs.