The smallest amount of scaling or blockage can greatly reduce a heat exchangers performance. Heat exchanger condensate cold water input steam input hot water output figure 1. Thickness measurement and making corrosion rate and remaining life calculation. When heat exchanger handles steam and other fluid of high temperature, it has hazard of burns. Generally, both the shell and tube bundle are free of expansion, this permits no thermal stress is produced between shell. The type of heat exchanger used for a particular usage depends on the application and requirement. The floating tube heat exchanger is standard equipment in our quadrant sr and srs series thermal oxidizer and has found success in other heat recovery applications. Heat exchanger inspection techniques and corrosion mechanisms. When the heat exchanger is under running or pressurizing, never unscrew any of the tightening bolts. Establish inspection guidelines to ensure mechanical integrity and continued reliable operation of shell and tube heat exchangers. The floating tube heat exchanger is unlike any shell and tube heat exchanger. Most process shellandtube heat exchangers are manufactured to tubular exchanger manufacturers association tema standards. How shell and tube heat exchangers work engineering.
As shown in the name of it, in this design, one end of the tubesheet is fixed to the shell, while the other one can float freely inside the shell. Floating head heat exchanger maintenance heat exchanger leak. Heat exchanger tube inspection is vital for refining and petrochemicals. 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. Since 1979, he has consulted on a variety of problems with process and power generation heat exchanger problems. Welded joints are to be sufficiently cleaned prior to testing the exchanger to permit proper inspection during the test. Inspection checklist for breech lock exchangers tag no. Heat exchanger inspection techniques and corrosion mechanisms powerpoint presentation. There are a variety of methods of inspecting or testing heat exchangers. On receipt of the heat exchanger, inspect for shipping damage to all protective covers. Inspection of the entire length of heat exchanger tubes however brings along a few extra challenges. Gaskets between inlet and outlet connection flanges should be centered to allow unrestricted fluid flow.
Like with most equipment, inspection planning is essential for the successful inspection and maintenance of heat exchanger tubulars. Which heat exchanger inspection method is usually included in a by the standards inspection of a conventional gas furnace. These standards include a threeletter designation of the exchanger type that specifies overall mechanical layout in. If only clean heat transfer surface ratings are published, a statement shall be included to contact the manufacturer if. Heat can be transferred between the same phases liquid to liquid, gas to gas, or phase change can occur on either the process side. Heat exchanger hydrotesting procedures chemical plant. Floating head heat exchanger on sales quality floating. Floating head versus u tube heat exchanger chemical. Basically one man at channel head side with an airgun and another at floating head side to plug the other end with a pressure gauge. This is a handson tech teaching tech workshop on greatly increasing your abilities at finding failure using the inspector camera. We strictly adhere to asme sec viii div1 and we are experienced for manufacturing pressure vessels that are made from carbon steel, stainless steel,duplex 2205,explosion bonded plates etc. Ndt inspection services for tube bundles to include heat exchangers, condensers, oil coolers, air conditioning units.
Heat exchangers on food duties should be cleaned every day, a suggested method is. Heat exchanger hydrotesting procedures heat exchanger hydrotesting procedures. Heat transfer equipment may be designated by type or function it performs, such as chiller, condenser, cooler reboiler, etc. Heat transfer equipment must be properly maintained to provide maximum efficiency. We deliver effective nonintrusive inspection nii for heat exchanger vessels and apply this approach widely to the shell side. Pressure vessels and heat exchangers cpg is one of the leading manufacturers of high pressure vessels and heat exchangers. Shell and tube, floating head, plate and fin, bayonet, air coolers are just a few of the types of heat transfer equipment. Upon receipt of the heat exchanger, inspect for shipping damage.
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. Certified print should be checked to insure proper connection of the system piping to the highk heat exchanger. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Sonomatic provides a range of inspection and integrity services for heat exchangers and tubing. 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. Removing, and visually inspecting a heat exchanger is only half of the service you can expect to receive from us. Heat exchanger inspection and testing galmukoff marine.
Floating head exchangers are used when the media being handled causes fairly rapid. Discharge the fluid with water and monitor the situation through the glass tube. Floating head id and od, pass partitions, gasket surfaces iv. Scribd is the worlds largest social reading and publishing site. Operating any plate heat exchanger at temperatures above the design temperature of the gasket material will re sult in gasket and adhesive failure. Nbw has years of experience with all styles of heat exchangers and all types of materials. This is a very popular version as the heads can be removed to clean the inside of the tubes. Maintenance and cleaning may only be done with a shutdown heat exchanger. Continuation details connect water pump water pump raise the pressure up to value given by inspection discharge the. Heat exchangers such as shell and tube exchangers, singlephase exchangers, multiphase exchangers, multicomponent condenser exchangers, reboiler exchangers, fixed tube sheet exchangers, ubundle exchangers and floating head pull through bundle type heat exchangers can be tested. Why wait for system breakdowns to perform corrective maintenance. Cpk installation, operation, and maintenance manual. What is the function of floating head in heat exchanger.
The front head piping must be unbolted to allow the removal of the front head, if this is. Principle of heat exchanger there are various types of heat exchanger which are categorized with respect to construction, transfer process. The types of exchangers are mainly defined by their construction and are as follows. System piping should be free of debris prior to connection to the highk heat exchanger. This page offers some advice and tips for installation and maintenance of marine heat exchangers. A heatexchanger system consisting of helically corrugated tubes.
Heat exchangers floating heads or tube bundles manufacture of aircooled heat. There are two main categories of shell and tube exchanger. Searching documents and internet sources the following is what i found on heat exchanger inspection methods and sources. If you continue browsing the site, you agree to the use of cookies on this website. Louisiana and texas heat exchanger leak detection services. Why perform maintenance at irregular intervals and inconvenient times. Three classes of small pressure vessels as defined by size and mawp in table 1a or 1b.
The ring which is split in half to permit dismantling is placed at the back of the tube sheet shows the details of a split ring assembly. A heat exchanger is a devices used to transfer heat between mediums. With high reliability and wide adaptability, floating head heat exchanger has accumulated a wealth of experience during the long term using process, and promoted its. Shell and tube heat exchangers are one of the most popular types of exchanger due to the flexibility the designer has to allow for a wide range of pressures and temperatures. 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. A floating head heat exchanges is a type of shell and tube device with several components, including tubes, tube sheets, shell and shellside nozzles, tubeside channels and nozzles, channel covers, a pass divider and baffles. Site selection is the first step to insure proper installation of bascowhitlock heat transfer equipment. Itt heat transfer heat exchangers are protect ed against the. Heat exchangers suffer problems within the tubes that make up the majority of the useful area within the exchanger unit. The choice of shell and tube type is determined chiefly by factors such as the need for the provision for differential movement between shell and tubes, the design pressure, the design temperature, and the fouling nature of the fluids rather than the function.
Shell and tube exchangers an overview sciencedirect topics. Part i, analysis, design and inspection, 363373, asme, new york. Heat exchanger inspection training the inspector camera. Head off heat exchanger errors chemical processing. Higher temperatures may be reached with special gasket and adhesive materials. Straight tube heat exchangers removable bundlesallow for sufficient clearance at the stationary head end for removal of the bundle. Inspection procedure for shell and tube heat exchangers. Lewis, in heat exchanger equipment field manual, 20. Tubular heat exchanger inspection, maintenance, and repair. Different types of heat exchangers are used onboard a ship. Pipe size shown is not the connection size of the heat exchanger. Almost all the systems onboard ship depends on heat exchanger where the fluid is either cooled or heated. Quick selection tables brazed plate heat exchangers.
A leaking tube can impact production, the environment and most importantly, lives. All of the related components that are able to be bead blasted, receive blasting in our blast cabinet. Cpi manufactures a revolutionary shell and tube heat exchanger. Furthermore, dont touch it until complete cooldown to the normal temperature after the shutdown. Cpk is a removable tube bundle design with an externally packed floating tubesheet that can.
Floating head heat exchanger is one of the most used heat exchanger. It is preferred that an external inspection checklist is utilized for recording the. Illustrates the shell and u tube type heat exchangers commonly indianoil. Saudi aramco inspection requirements forms sa f 175. Heat exchanger inspection planning inspectioneering. It is important that the heat exchanger is easily accessible for inspection, maintenance and cleaning. We are able to detect large and very small leaks in heat exchangers before the leaks become a liability. Installation, operation, and maintenance manual for shell. This presentation is about maintenance procedure for floating head heat exchanger. Heat exchanger inspection heat exchanger pipe fluid.
Heat exchangers with the limited design conditions shown in table 1a or 1b of this. Eddy current is based on the principle of measuring changes in the impedance of an electromagnetic coil as it is scanned over a surface of conductive material. Raw water which has removed heat from the engine through the heat exchanger is then injected into the exhaust manifold, from which it flows to the exhaust elbow to quench the exhaust. Both ends of u tube are fixed in the same tube sheet. The normal maximum operating temperature for a plate heat exchanger is approximately 120 to 160 degrees celsius. In the focus on finding failure advanced class for heat exchanger inspection training, each technician will learn how to increase their ability to be truly focused on finding failure to incredible levels.
Thermal expansion resulting due to the temperature difference between. Exchanger inspection 101 visual inspection of shell and tube heat exchangers. Floating head heat exchanger is widely used for the service where the temperature is high between the shell and tube bundle, or the dirty service, like the petroleum refinery. Some examples of the tema designation for heat exchangers. Inspection of gasket seating area, pass partition and. Pass pure water through the heat exchanger for 510 minutes.
Floating head heat exchanger design tema api anson. Tubesheets in fixed and floating head heat exchangers. Bonnet intergral cover, one pass shell, fixed tubesheet bonnet. Induceddraft furnace heat exchanger inspection procedure. Fixed and floating head heat exchanger constructions find widespread. Pressure vessels heat exchangers, storage vessel and. 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. Floating head heat exchanger maintenance free download as powerpoint presentation.