HEAT TRANSFER PIPE REPAIR METHOD OF HEAT EXCHANGER AND INSERTION PIPE FOR HEAT TRANSFER PIPE REPAIR

摘要

PROBLEM TO BE SOLVED: To suppress or prevent progress of corrosion due to dew condensation of a heat transfer pipe 4, in a method for repairing the heat transfer pipe 4 of a heat exchanger for performing heat exchange between combustion exhaust gas circulating in a passage member 1, and air introduced into the heat transfer pipe 4 attached to the passage member 1 in an attitude of being orthogonal to the circulation direction of the combustion exhaust gas.SOLUTION: An insertion pipe 8 for repair is inserted into a heat transfer pipe 4 so as to make a gap 9 between an inner peripheral surface of the heat transfer pipe 4 and the insertion pipe.SELECTED DRAWING: Figure 3