Inspection procedure for shell and tube heat exchangers. Tube degradation inspection using ect, an azed testing typically involves outside vendors and setup time. Ppt heat exchanger powerpoint presentation free to. Heat exchanger inspection heat exchanger pipe fluid. 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. There are a variety of methods of inspecting or testing heat exchangers. This manual also goes into detail about the test equipment used in the 3 step. Aircooled heat exchangers are usually used when the heat exchanger outlet temperature is at least 20 of above the maximum expected ambient air temperature. Inspection of the entire length of heat exchanger tubes however brings along a few extra challenges. The heat exchanger inspection article provides you with information about the inspection of the heat exchanger and heat exchanger testing during the manufacturing phase, as well as inservice inspection in operating units. 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. Attached is the official carrier bryant payne 90% furnace heat exchanger inspection procedure.
The tube material of this equipment is made from various ferromagnetic and nonferromagnetic alloys. Heat exchanger equipment field manual sciencedirect. 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. References material safety data sheets msds are electronically stored and can be. 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. Welcome to the most trusted and comprehensive heat exchanger inspection. Heat exchanger design handbook by t kuppan free download.
Heat exchangers have widespread industrial and domestic applications. The third party inspection for shell and tube heat exchanger article provides a sample procedure for heat exchanger inspection and heat exchanger tsting. 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. Purpose establish inspection guidelines to ensure mechanical integrity and continued reliable operation of shell and tube heat exchangers. Nde technologies for the examination of heat exchangers.
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. Third party inspection for shell and tube heat exchanger. 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. Heat exchanger inspection free download as pdf file. The heat exchanger must be isolated from system vibrations using flexible piping connections and isolation pads on the mounting feet. Pdf a heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Residential gas furnace heat exchanger testing douglas dewerth, p.
Searching documents and internet sources the following is what i found on heat exchanger inspection methods and sources. This procedure applies to the pressure containing parts of the exchanger alone with supporting structures. Pdf design, fabrication and testing of shell and tube heat. A free powerpoint ppt presentation displayed as a flash slide show on id.
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