| 摘要 |
PURPOSE:To make the anti-corrosion measure such as the electrolytic protection which was applied to hitherto tanks unnecessary by a method wherein the outside of a resin vessel in which hot water is storaged is covered with a trunk part and a cover plate, and the sides of the joint of these cap trunk separated from said resin vessel are joined by welding. CONSTITUTION:The outside of the resin vessel 22 in which hot water 21 is storaged is covered with a trunk part 23 made of metal and a cap 24 as well as the position 27 of the joint of these cap 24 and trunk part 23 separated from said resin vessel 22 are joined by welding. Namely, the problem of pinholes etc. will not occur because the resin vessel which directly storage hot water is used. Accordingly, the anti-corrosion measure such as the electrolytic protection which was applied to hitherto tanks becomes unnecessary. |
