| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a simple branch part anticorrosion structure of a metal pipeline and a corrosion prevention method of the pipeline branch part.SOLUTION: A branch part anticorrosion structure of an embedded metal pipeline is provided. An outer circumferential surface of a main pipe (straight pipe) 1 of the branched part is covered with a heat-shrinkable tube 3 so as to perform corrosion prevention. The branch part is covered with a cover 10 over the whole region and an epoxy resin 14 mixed with sand is filled over the whole region within the cover. Therein, a packing 13 is arranged while interposing the edge of the tube 3 over the outer surface whole circumference of the main pipe corresponding to main pipe side both edge parts of the cover to prevent resin leakage. Further, irrespective of the size of diameter of the branch pipe 2, reliable closure between the cover and the branch pipe is materialized by the use of filler resin. By virtue of the resin filling, tight sealing between the cover inner surface and the branch part outer surface is provided. Thus, high corrosion prevention can be assured by a simple structure.</p> |
