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一、概述管材的选择是给排水工程设计的重要问题之一,它关系到工程的经济性和技术的合理性。一般来说管道费用占整个给排水工程的50～80％,因此在给排水工程设计过程中,必须合理的选择管材。根据日本东洋公司提供的《关于材料详细腐蚀数据图表》,对于设计含有各种化学成份水质的给排水工程具有一定的参考价值。二、图表的使用说明《关于材料详细腐蚀数据图表》详细列举了24种介质、36种材料的腐蚀数据情况。设计者可以通过图表查得所需的材质在介质中的腐蚀数据,大大缩小选材的范围,可以比较正确的选择合理的管材。对超出图表范围的不能使用本图表。此外还必须考虑到杂质分解、电偶连接、磨损等的影响。最可靠的选择材料的方法是进行现场试验。
I. Overview Pipeline selection is one of the important issues in the design of water supply and drainage engineering. It relates to the economical nature of the project and the rationality of the technology. In general, the pipeline cost accounts for 50 to 80% of the entire water supply and drainage project. Therefore, in the design process of the water supply and drainage project, a reasonable choice of pipe must be adopted. According to the “Detailed Corrosion Data Chart for Materials” provided by Japan Toyo Corporation, it has certain reference value for the design of water supply and drainage engineering with various chemical components and water quality. Second, the use of the chart “Detailed corrosion data on the material diagram” details the corrosion data of 24 kinds of media, 36 kinds of materials. The designer can check the corrosion data of the required material in the medium through the chart, greatly reducing the scope of the material selection, and can reasonably select a reasonable pipe material. Do not use this chart for areas beyond the chart. In addition, the influence of impurity decomposition, galvanic coupling, abrasion, etc. must also be taken into consideration. The most reliable way to select materials is to conduct field tests.