Heat exchanger tube inspection, eddy current testing ectane 2. This manual will broaden your understanding of how defects occur in furnace heat exchangers and will enable you to accurately assess the integrity of any furnace. Iris is an ultrasonic method used for the nondestructive testing of pipes and. 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. Understanding id eddycurrent inspection of heat exchanger tubing. Welcome specializing in tube inspections since 1985 iris inspection services is a tubing inspection specialty company providing comprehensive inspection support to the petrochemical industry, from upstream to downstream, chemical, and power plants. Our specialization and extensive experience in heat exchanger. Internal rotary inspection system iris ultrasonic inspections of. 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. Heat exchanger inspection checklist qc, inspection. If you know the scope, steps and activities, schedule, resources and cost plan can be developed easily and monitored. Internal rotary inspection system iris ultrasonic inspections of heat exchanger tubes.
Because there are several hundred of tubes in a heat exchanger bundle, and conventional inspection is slow, only a small fraction of the tubes is inspected. Highperformance iris testing of heat exchanger tubes. Apr 20, 2015 heat exchanger tubular inspection techniques. Limitations poor surface preparation or deposits may affect ultrasonic coupling. This section covers the advantages and limitations of a few available methods to heat exchanger tubular inspection and some notsocommon methods that have specialized applications.
Welcome to the most trusted and comprehensive heat exchanger inspection directory on the internet. Prepare a copy of uw 51 and 52 radiography acceptance criteria with appendix 4, other ndt appendis skim through. Internal rotary inspection system iris is an ultrasonic method for the nondestructive testing of pipes and tubes. A leaking tube can impact production, the environment and most importantly, lives. Apr, 2016 heat exchanger inspection with eddy current.
Iris requires the tubes to be thoroughly cleaned for ultrasonic coupling. Heat exchanger design handbook kuppan thulukkanam download. Since 1979, he has consulted on a variety of problems with process and power generation heat exchanger problems. Heat exchanger tubes are often scanned using one inspection technique, and then reinspected with another to confirm the remaining wall thickness. Inspection of the entire length of heat exchanger tubes however brings along a few extra challenges. Iris tube testing is powerful but complex, sensitive to pull speed and centering, and is of limited effectiveness in thinwalled tubes.
Internal rotary inspection system iris ultrasonic inspections of heat exchanger tubes 5311 86th street nw, edmonton, alberta t6e 5t8 phone. 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. The internal rotary inspection system iris is an ultrasonic testing ut technique commonly used to inspect a wide range of ferrous and nonferrous tubing materials in heat exchangers. The following techniques are available for heat exchanger tubes. Heat exchangers and steam generators, which are used in power plants, have thousands of tubes that must be prevented from leaking. Which heat exchanger inspection method is usually included in a by the standards inspection of a conventional gas furnace. Heat exchanger inspection techniques and corrosion mechanisms. The ultrasonic iris option is used to inspect a wide range of materials, including ferrous, nonferrous. 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. A practical guide for planning, selecting and designing of shell and tube exchangers takes users on a stepbystep guide to the design of heat exchangers in daily practice, showing how to determine the effective driving temperature difference for heat transfer. Client a page 2 of 10 iris inspection report unit 123 final report k0xx15 jxx22 executive summary as requested by incon inspection consultants acting for client a, innospection has carried out an iris internal rotational inspection system ultrasonic tube inspection, on the heat exchanger tube bundle identified as 123.
Other ndt testing and inspection services include ultrasonic iris 9000, shear wave and straight beam. The documentation book furnace heat exchanger failure the. Iris vs eddy current testing titan metal fabricators. The technique has proven effective and reliable in detecting and sizing general wall loss and localized corrosion at the inner id and outer od diameters. The authors have presented more than 100 short intensive courses on shellandtube heat exchangers, closed feed water heaters, and tubular exchanger inspection, maintenance, and repair in the united states, canada, and europe. Heat exchanger design handbook kuppan thulukkanam this comprehensive reference covers all the important aspects of heat exchangers hes. Irisndt uses iris to detect general corrosionerosion and localized. Services iris inspection services is a tubing inspection specialty company. Both techniques have their advantages and limitations. Field proven and commonly used in boilers, heat exchangers, and finfan tubes. The iris method is mostly used for inspection of carbon steel tubes and is. The iris probe is inserted into a tube that is flooded with water, and the probe is pulled out slowly as the data is displayed and recorded.
The methods presented include remote field eddy current, magnetic flux leakage, internal rotary inspection system iris and eddy current. May 10, 2016 if the heat exchanger is directly connected to a pump, the test pressure in no case shall be less than the pump shut off pressure. If the shell or tube side of the heat exchanger is connected to any equipment having safety valve installed on it, the test pressure of the exchanger shall not be less than the set pressure of the safety valve. Completely revised and updated to reflect current advances in heat exchanger technology, heat exchanger design handbook, second edition includes enhanced figures and thermal effectiveness charts, tables, new chapter, and additional topicsall while keeping the qualities that made the first edition a centerpiece of information for. 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. A broad range of heat exchanger inspection resources are compiled in this industrial portal which provides. Internal rotary inspection system iris the internal rotary inspection system iris is an ultrasonic nondestructive testing ndt technique used to inspect pipes and tubes. Conventional inspection techniques of heat exchanger tubes, such as ultrasonic and eddy current, examine one local area at a time and therefore a scan of the entire tube is required.
Irisndt uses iris to detect general corrosionerosion and localized volumetric defects such as pitting, fretting, and others in ferrous carbon steel tubes such as sa214 and sa179 tubes and nonferrous stainless steel tubes. Top 10 cleaning and inspection challenges texas tower. Sample activities for heat exchanger cleaning and inspection work activities and work steps are very useful information. Heat exchanger defects are usually caused by poor maintenance or operational issues. Heat exchanger tube inspection is vital for refining and petrochemicals. Specifics related to dimension of heat exchanger tema. Heat exchanger inspection planning inspectioneering. Top 10 cleaning and inspection challenges texas tower vcfe cleaning. We aim to exceed our customers expectations while sustaining. Induceddraft furnace heat exchanger inspection procedure 1 this procedure is intended for use by qualified individuals trained and experienced in the servicing of this type of. May 01, 2017 understanding id eddycurrent inspection of heat exchanger tubing eddycurrent testing can be a useful tool when it is planned for a specific purpose, and the manufacturer, fabricator and owneroperator communicate effectively. Another heat exchanger video, found this one today 10909 with my inspector camera.
There are a variety of methods of inspecting or testing heat exchangers. We provide a comprehensive inspection program consisting of multiple tube inspection techniques to determine the integrity of all types of heat exchangers, air coolers, boilers, chillers, as well as any other tubing. The inspection process for heat exchanger tubulars. The heat exchanger must be isolated from system vibrations using flexible piping connections and isolation pads on the mounting feet. They need the documentation book for furnace heat exchanger failure. Sample activities for heat exchanger cleaning and inspection work. Over the last decade, eddyfi ectane has become the undisputed reference for heat exchanger tubing inspection and surface eddy current array, all around the globe. Iris technology overview of iris principles youtube. Sep 10, 2015 top 10 cleaning and inspection challenges texas tower vcfe cleaning. We have 3 hexs for tube inspection during a forthcoming shutdown 1 straight stst tubes, 1 straight cst tubes and 1 ubundle cst. Literature eddy current testing equipment for ndt inspection.
This article describes the use of advanced tubing inspection ndt methods for boiler and heat exchanger equipment in the petrochemical industry to supplement major turnaround inspections. Heat exchanger design handbook mechanical engineering. For material impact requirement ug 84 and ucs 66 pwht cycle ucs 56. Our specialization and extensive experience in heat exchanger inspection ensures that components are properly evaluated to detect damage.
Multiscan ms5800 flaw detector for tube inspection olympus ims. This approach means inspection of the shell can take place without the need to remove the tube bundle. Eddy current inspection is often used to detect corrosion, erosion, cracking and other changes in tubing. Iris is commonly used in boilers, shellandtube heat exchangers, and finfan heat exchanger tubes. Heat exchangers suffer problems within the tubes that make up the majority of the useful area within the exchanger unit. Induceddraft furnace heat exchanger inspection procedure. Sonomatic provides a range of inspection and integrity services for heat exchangers and tubing. Failures are considered unacceptable both economically and environmentally. Iris is commonly used in boilers, heat exchangers, and finfan tubes. We deliver effective nonintrusive inspection nii for heat exchanger vessels and apply this approach widely to the shell side. One of the most common methods used is a visual inspection of the heat exchanger with a mirror and a strong light. Following data compares the performance of eddy current testing ect and ultrasonic iris for inspection of heat exchanger tubes. Our customer service, reliability, dedication, and professionalism are unsurpassed. When defect occur, they tend to crop up in the same areas on any given make or model of equipment.
Heat exchanger experts training manual trutech tools, ltd. The petrochemical industry depends on many heat exchangers and boilers. Failure is usually caused by corrosion or erosion of the tube wall. Heat exchanger inspection techniques and corrosion mechanisms powerpoint presentation. The inspection specialists tubular heat exchangers are vital to the operation of a plant. This comprehensive reference covers all the important aspects of heat exchangers hestheir design and modes of operationand practical, largescale applications in process, power, petroleum, transport, air conditioning, refrigeration, cryogenics, heat recovery, energy, and other industries. Regular inspection is the best means of detecting wall loss at an early stage. Exchanger inspection 101 visual inspection of shell and tube heat exchangers. Thanks to a compact formfactor and its unmatched robustness, the multitechnology instrument earned a reputation for being bestinclass. Eddy current inspection is often used to detect corrosion, erosion, cracking and other changes in non ferromagnetic tubing. Searching documents and internet sources the following is what i found on heat exchanger inspection methods and sources. The inspector camera is not just an excellent furnace heat exchanger inspection device, it also perfectly addresses the need for an inspection tool to check out evaporator coils or inaccessible blowers, condensate pans without having to opening up sheet metal plenums. Internal rotating inspection system iris is one of the most commonly used methods. Internal rotary inspection system iris is an ultrasonic method for the.
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