The heat exchanger must be isolated from system vibrations using flexible piping connections and isolation pads on the mounting feet. Inspection of unit at regular intervals and as frequently as experience indicates, an examination should be made of the interior and the exterior of the heat exchanger. Pdf on feb 19, 2020, mohamed fayas saffiudeen and others. Hydrostatic testing of heat exchangers inspectioneering. Microbiologically influenced corrosion of stainless steels. As the worlds largest manufacturer of heat exchangers, we are very proud of our products and services. The vessel is filled with a nearly incompressible liquid usually water or oil pressurised to test pressure, and examined for. Heat is a form of energy measured in british thermal uni ts btu. The vessel is filled with a nearly incompressible liquid usually water or oil.
Common repairs to graphite heat exchangers are repair of cracks, replacement of tubes, and plugging of tubes. Up to eight design conditions can be investigated for fixed, utube, kettle and floating tubesheet style exchangers. The term heat exchanger applies to all equipment used to transfer heat between two streams. A typical heat exchanger, usually for higherpressure applications, is the shell and. In the equations above, p m is the primary membrane stress and p b is the primary bending stress. Inspection is with the shell side of the exchanger under the hydrostatic test pressure divided by 1.
Apr 27, 2005 waht is the code calling for testing hydrotesing the heat exchanger. Searching documents and internet sources the following is what i found on heat exchanger inspection methods and sources. Hydro test procedure for heat exchanger gas technologies. Leak testing of heat exchanger systems using the hydrogen method. The countercurrent design is most efficient, in that it can transfer the most heat. Heat exchangers hydrostatic test procedure free download as pdf file. The yield stress s y is taken as the smallest of the shell, reinforcing pad or nozzle neck s y values the discontinuity stress state at a nozzle includes both primary membrane and bending components.
This presentation is about maintenance procedure for floating head heat exchanger. Post weld heat treatment vessels shall, prior to post weld heat treatment, be carefully inspected by visual and nondestructive examination for dimensionless and any defect, so as to. Waht type of test we should condut sheel side, tube side and tigthness test which is reapeting shell trest o. Damage mechanisms also referred to as degradation mechanisms is a general term referring to any. Shell side of shell and tube type heat exchanger to check leakage. Vent valves should be opened before liquid is introduced to the heat exchanger. Reinstall channel cover, hydrotest tubes, complete hydrotest forms. As one end of the tube bundle is float, the heat exchanger can be guaranteed safety even under the extreme heat cycle.
Heat exchanger hydrotesting procedures svanels petroleum 12 mar 05 18. The international fuel gas and oil codes state that the heat exchanger should be checked on all service. This procedure is a generic method for the replacement of tubes. We run models in our exchanger software to provide options for styles and sizes, considering your cleaning requirements, code. Hydrotest, also known as hydrostatic test, is a way of checking the integrity of pressure vessels such as natural gas pipelines, gas cylinders, boilers, storage tanks as well as fuel tanks. There are a variety of methods of inspecting or testing heat exchangers.
Generally, the thicker the vessel the more important this check becomes. May 24, 2001 heat exchangers are pieces of process equipment built and designed for maximum efficiency of heat transfer between two different machines or mediums. As equation a governs for shells and either equation b or c governs for nozzles, the test. Hydrostatic test shall normally be carried out for all vessels by use of water. Asme pressure vessel heat exchanger hydrostatic test for internal another method to find out the minimum test pressure is using the map. Though this procedure has been effective for testing heat exchangers in natural draft furnaces, its effectiveness for testing heat exchangers on induceddraft furnaces that maintain a significant negative pressure within the heat exchanger has been questioned. Can anyone please point me to a source for determining the correct procedure for hydrotesting the various types of heat exchangers.
Caution first flange break personnel must stand upwind of flange being broken to lessen exposure to hazard. Heat exchangers, pressure vessels and fired heaters may be. A field procedure must be established and care taken to ensure the installation and removal of material which is specified for testing only. Exchanger inspection 101 visual inspection of shell and tube heat exchangers. To avoid brittle fracture, it is good engineering practice to ensure that the proposed test temperature is not too cold. Hydrostatic testing of heat exchangers may 24, 2001 4 comments related topics. Jan 25, 2020 heat exchanger hydrotest procedure pdf hydrotest procedure of heat exchanger at site. 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. In the plate inspection, also known as the integral pressure test, a defined test pressure is.
One btu is the amount of heat required to raise 1 pound of water 1 degree fahrenheit at sea level. Temperature is defined as a measure in degrees of sensible heat. Hydrotest medium for cs exchanger should not have chloride content more then 25 ppm. Apr 17, 2006 the gas appliance manufacturers association gama funded a study to determine the most effective method for checking a heat exchanger. Case histories from experience and the published literature illustrate factors which resulted in microbiologically influenced corrosion mic of stainless steel piping, storage tanks and heat exchangers by waters used for hydrotesting, cooling and other purposes. 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.
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. Threepart testing is necessary to determine the integrity of a heat exchanger. This ndt method is used to examine the welded joint in the metal using radiation. Hydro testing an exchanger posted in process heat transfer. Shellandtube heat exchangers can have multiple passes, such as 11, 12, 14, 16, and 18 exchangers, where the first number denotes the number of the shells and the second number denotes the number of passes. Manuals for the hisaka plate heat exchanger consist of the following seven related documents. Jerry did offer to look at the heat exchanger himself and i appreciate the offer of his time. 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. Both horizontal and vertical heat exchangers can be modeled. If you continue browsing the site, you agree to the use of cookies on this website. The training course series on leak detection in heat exchangers and underground pipelines using radiotracers addresses the needs of the radiotracer groups and their end users. A 12 shellandtube heat exchanger is illustrated in figure 5. We value you as our customer and wish to assure your satisfaction.
In most industrial processes, the loss of heat is very. The following procedure, as outlined in the 2003 international fuel gas code, and used here with permission, is intended as a guide to aid in determining that an appliance is properly installed and is in a safe condition for continuing use. It is a ideal design method when the heat medium is steam. Besides training purposes, this material will assist radiotracer groups in establishing their. Thank you for purchasing an alfa laval plate heat exchanger. Pdf a case study on procedure standardization of heat. Heat exchangers, pressure vessels and fired heaters may be included in a. It was suggested to take the heat exchanger to a boat yard marine mechanic because most people dont have all the different size plugs. However the pressure vessle code as per asme section viii, div. Hydrostatic testing procedure and water quality document. This procedure applies to all maintenance personnel that perform. Waht type of test we should condut sheel side, tube side and tigthness test which is reapeting shell trest o ronly two test are enought. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a fluid.
Third party inspection for shell and tube heat exchanger procedure. Aug 18, 2014 this presentation is about maintenance procedure for floating head heat exchanger. A shell and and tube exchanger with tema designation ahuchannel and removable cover,u tube,double split flow needs to be hydro tested. Hydro test procedure for heat exchanger free download as pdf file. If you need asme uhx and tema mechanical design calculations, drawings and reports then the compress heat exchanger option is for you. Bfwoperating pressure 85 kgcm2, temp 160c shell side fluid. The change is a generic procedure for replacing tubes in a heat exchanger. Periodically maintain a heat exchanger maintenance. Asme uhx and tema heat exchanger software codeware. One test procedure used by some practitioners is to release a small amount of carbon monoxide co in the hot heat exchanger and then check for high concentrations of co in the circulating air stream. Remove, clean, and reinstall bundle from an exchanger. However, the term is commonly used to equipment in which two process streams exchange heat with each other. Carryout hydro test on shell side tube side as per. Procedure and acceptance standards of the production weld test shall be in accordance with applicable codes and standards.
Start the flow of fluids gradually, introducing the cold fluid first. Heat exchanger hydrotesting procedures chemical plant. The range of the pressure gauge should be as per applicable code. R sekulib university of kentucky introduction a heat exchanger is a device that is used for transfer of thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a. Plate heat exchanger 2 operation and maintenance manual.
We have prepared this instruction manual to assist you with your alfa laval plate heat exchanger in various situations. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Hydro test procedure for heat exchanger heat hydro test procedure for heat exchanger free download as pdf file. The heat exchanger xchanger to be erected on its foundation minimum 2 nos calibrated pressure gauges are to be used for each test. Induceddraft furnace heat exchanger inspection procedure. Hydro test procedure for heat exchanger vyly0dvme3nm idocpub. Can anyone please point me to a source for determining the correct procedure for hydrotesting the various. Plate material, extra length bolts, and gaskets for testing shall be furnished by the field construction contractor unless dictated otherwise by contract requirements. Waht is the code calling for testing hydrotesing the heat exchanger. Discussion of the detailed anatomy of the heat exchanger and the methods to devise analysisaided designs have been the primary focus of the material. The bundle extractor or bundle puller consists in extracting the exchanger from its shell through the ad hoc machines, called aerial tube bundle extractor having a variable.
Freon has been used as a tracer gas with a halogen leak detector. Plate heat exchanger hereinafter phe performs heat exchanging by transferring heat between hot and cold fluids flowing alternately through heat transfer plates, which are thin metal sheets having fine corrugated patterns. A case study on procedure standardization of heat exchanger. Jul 07, 2019 heat exchanger hydrotest procedure pdf hydrotest procedure of heat exchanger at site. Feb 07, 2017 it was suggested to take the heat exchanger to a boat yard marine mechanic because most people dont have all the different size plugs.
If it is, a ug99 h warning will be listed in the deficiency report. The term sensible heat refers to heat that can be measured with a thermometer. Or you could look into getting a test kit from jegs or nappa. With the help of this test, pressure tightness, strength and any leakages are checked. Charge the tank to the selected temperature and set the heat exchanger inlet temperature at the selected differential above the tank. An odd number of tube passes is seldom used except the 11 exchanger. Jan 22, 2020 hydrotest procedure of heat exchanger at site.
Anson can manufacture u tube heat exchanger in accordance with the asme standard, tema, and api for 1, 2, or 4 pass u tube heat exchanger, other special requirements. Heat exchangers hydrostatic test procedure heat exchanger. When the heat exchanger is filled and all air has been vented, the vent valves are closed. Shell and tube heat exchanger calibration certificates for test equipment. Sample test procedure tanks with integral heat exchangers. The bundle extractor or bundle puller consists in extracting the exchanger from its shell through the ad hoc machines, called aerial tube bundle extractor having a variable pull power, depending on the size of the exchanger itself. Still confused in looking the very best site for trying to find ppt of fabrication of waste chill.