Method of joining heat transfer tube to tube plate
专利汇可以提供Method of joining heat transfer tube to tube plate专利检索，专利查询，专利分析的服务。并且PURPOSE:To enable a heat transfer tube to be joined readily to a tube plate in a shell and tube exchanger by a method wherein a thin-walled heat transfer tube is formed with a circumferential groove at the outer periphery of an end thereof and a seal member of graphite is wound round the circumferential groove and then the heat transfer tube is press-fitted inside a through-hole of a thick walled tube plate. CONSTITUTION:Joining of a heat transfer tube 1 to a tube plate 2 in a steam generator 10 used, for example, in a nuclear power plant is made under the condition the upper part of a lower shell 11 is kept open where upper shell 12 is not fitted thereto. The heat transfer tube 1 is formed with a circumferential groove 33 on the outer surface of an end 31 thereof and then a seal member 35 of graphite is wound round the circumferential groove 33. The heat transfer tube 1 is allowed to pass through-holes of perforated support plates 24 and then its end 31 is positioned in a through-hole 37 of the tube plate 3. Subsequently, the end portion 31 is expanded by means of a mandrel, etc. so that the heat transfer tube 1 may be joined to the tube plate 3 due to its elastic recovering force. By this method, the heat transfer tube can be joined readily to the tube plate without welding and a highly reliable joint can be obtained. Further, replacement of heat transfer tubes with new ones can be made readily in a short time.，下面是Method of joining heat transfer tube to tube plate专利的具体信息内容。
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