A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Heat exchangers have widespread industrial and domestic applications. This manual also goes into detail about the test equipment used in the 3 step. After completion, the heat exchanger tubes inspection shows a loss of thickness to the internal tube surface as shown in the tube sheet in fig. Purpose establish inspection guidelines to ensure mechanical integrity and continued reliable operation of shell and tube heat exchangers.
Eddy current analysis of shipped stainless steel heat exchanger. A free powerpoint ppt presentation displayed as a flash slide show on id. The heat exchanger must be isolated from system vibrations using flexible piping connections and isolation pads on the mounting feet. Improper or inadequate furnace heat exchanger inspection techniques can result in the misdiagnosis of a heat exchanger failure when a failure has not occurred or is not imminent.
Searching documents and internet sources the following is what i found on heat exchanger inspection methods and sources. Third party inspection for shell and tube heat exchanger. Heat exchanger design handbook by t kuppan free download. There are many areas on a heat exchanger that you can not get to for visual inspections while the heat exchanger is in the furnace. Heat exchanger inspection heat exchanger pipe fluid. Heat exchanger inspection free download as pdf file. This procedure applies to the pressure containing parts of the exchanger alone with supporting structures. Tube degradation inspection using ect, an azed testing typically involves outside vendors and setup time. Along the length of the tubes tube tube sheet joints can be visually inspected and standard ndt techniques, like penetrant testing or magnetic testing can be utilized. The inspection of heat exchangers is the one area of equipment inspection where i firmly advocate the use of a check list to make sure you got everything. The tube material of this equipment is made from various ferromagnetic and nonferromagnetic alloys. Residential gas furnace heat exchanger testing douglas dewerth, p. Welcome to the most trusted and comprehensive heat exchanger inspection. References material safety data sheets msds are electronically stored and can be.
Nde technologies for the examination of heat exchangers. Heat exchanger equipment field manual sciencedirect. Inspection of the entire length of heat exchanger tubes however brings along a few extra challenges. Pdf design, fabrication and testing of shell and tube heat. If the heat exchanger is located at the inlet or discharge of a blower with a pulsating flow, such as a roots type rotary lobe blower, the heat exchanger must be protected from the pulsation by a chambered silencer. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Exchanger inspection 101 visual inspection of shell and tube heat exchangers. There are a variety of methods of inspecting or testing heat exchangers. Inspection procedure for shell and tube heat exchangers. Heat exchanger equipment field manual provides an indispensable means for the determination of possible failures and for the recognition of the optimization potential of the respective heat exchanger.
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