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THERMINOL 66 heat transfer fluidProven performancefor high-temperature,low-pressure applications- 3 to 345 C (27 to 650 F)
THERMINOL 66 heat transfer fluidMPhysical and chemicalcharacteristicsax.bullow-pressure, indirect heating systems. It delivers rminol 66 fluid is designed for use in nonpressurized/ Fdependable, uniform process heat with no need for highpressures. The high boiling point of Therminol 66 helps reducethe volatility and fluid leakage problems associated with Cother fluids.742534–345–1The recommended maximum bulk (345 C/650 F) and film(375 C/705 F) temperatures are based on industry-standardthermal studies. Operation at or below these temperaturemaximums can provide long service life under most operatingEastman Therminol 66 heat transfer fluidoffers outstanding high-temperatureperformance to 345 C (650 F), includingexcellent thermal stability and low vaporpressure. These properties result in reliable,consistent performance of heat transfersystems over long periods of time. Therminol66 performance is proven through many yearsof industrial experience under a wide range ofoperating conditions. No heat transfer fluidmaterial in the world has had more successthan Therminol 66.conditions.Actual fluid life is dependent on the total system design andoperation and can vary by heat transfer fluid chemistry. As fluidages, the formation of low- and high-boiling compounds mayresult. Low-boiling compounds should be vented from thesystem as necessary to a safe location away from personnel andsources of ignition and in compliance with applicable regulationsand laws. The high-boiling compounds can be very soluble inthe fluid. Significant overheating or fluid contamination willaccelerate decomposition and may result in increased highboiler and solids concentrations. Excess solids can typically befiltered for removal.Eastman recommends that systems utilizing Therminol 66fluid should be blanketed with an atmosphere of inert gas toprotect against the effects of fluid oxidation on its performanceTherminol 66 is available globally. Contact yourand life expectancy. Pressure relief device(s) should be installedlocal Eastman Therminol sales representative forwhere required.more information.Therminol 66 is noncorrosive to metals commonly used inthe construction of heat transfer systems.While Therminol 66 has a relatively high flash point, it is notclassified as a fire-resistant heat transfer fluid. Consequently, theuse of protective devices may be required to minimize fire risk,and users of Therminol 66 should check with their safety andrisk management experts for specific instructions.
Typical propertiesaAppearanceClear, pale yellow liquidCompositionModified terphenylMaximum bulk temperature345 C (650 F)Maximum film temperature375 C (705 F)Normal boiling point359 C (678 F)Pumpability, at 300 mm /s (cSt)11 C (52 F)Pumpability, at 2000 mm /s (cSt)–3 C (27 F)Flash point, COC (ASTM D-92)184 C (363 F)Flash point, PMCC (ASTM D-93)170 C (338 F)Autoignition temperature (ASTM E-659)374 C (705 F)Autoignition temperature (DIN 51794)399 C (750 F)Pour point (ASTM D-97)–32 C (–25 F)22Minimum liquid temperatures for fully developed turbulent flow (NRe 10,000)10 ft/sec, 1-in. tube (3.048 m/s, 2.54-cm tube)72 C (162 F)20 ft/sec, 1-in. tube (6.096 m/s, 2.54-cm tube)53 C (128 F)Minimum liquid temperatures for transitional region flow (NRe 2000)a10 ft/sec, 1-in. tube (3.048 m/s, 2.54-cm tube)35 C (96 F)20 ft/sec, 1-in. tube (6.096 m/s, 2.54-cm tube)26 C (78 F)Coefficient of thermal expansion at 200 C0.000819/ C (0.000455/ F)Total acidity (ASTM D-664) 0.2 mg KOH/gAverage molecular weight252Pseudocritical temperature569 C (1056 F)Pseudocritical pressure24.3 bar (353 psia)Pseudocritical density317 kg/m3 (19.8 lb/ft3)Chlorine content, ppm (DIN 51577) 10 ppmCopper corrosion (ASTM D-130) 1aMoisture content, maximum (ASTM E-203)150 ppmDielectric constant @ 23ºC (ASTM D-924)2.61T hese data are based on samples tested in the laboratory and are not guaranteed for all samples. Contact us for complete sales specifications for Therminol 66 fluid. Does not constitute an express warranty. See disclaimer on the back page of this bulletin.To create your own customized tablewith preferred properties, units of measure,and temperature intervals, visitTherminol.com/resourcesand download the Therminol heat transfer fluid calculator.For technical service, visit the contact page of our website, Therminol.com.
Liquid properties of Therminol 66 heat transfer fluid by temperaturea(SI at vityLiquid viscositycVaporpressured C Fkg/m3kJ/(kg·K)kJ/kgkJ/kgW/(m·K)cP (mPa·s)cSt 9.6821.50.08500.2950.395124Maximum recommended bulk temperature 345 C (650 F). These data are based on samples tested in the laboratory and are not guaranteed for all samples. Contact us for complete salesspecifications for Therminol 66 fluid. bLiquid enthalpy basis is –17.8ºC (0ºF). c1 cSt 1 mm2/s and 1 mPa s 1 cP. d100 kPa 1 bara
Liquid properties of Therminol 66 heat transfer fluid by temperaturea(English units)TemperatureLiquid densityLiquidheat capacityHeat vityLiquid viscositycVaporpressured F Clb/gallb/ft3Btu/(lb· F)Btu/lbBtu/lbBtu/(ft·h· F)lb/(ft·h)cSt 05000.7440.40615.07 700 003716.2346.60.682111.4354.80.04910.7110.39318.4
TLC Total Lifecycle Care Eastman’s TLC Total Lifecycle Care program isdesigned to support Therminol customers throughouttheir systems’ life cycle. This comprehensive programincludes system design support, start-up assistance,training, sample analysis, flush and refill fluids, and ourfluid trade-in program. In North America, call ourhotline at 1-800-433-6997 or contact your local salesor technical representative.
In-service heat transfer fluidsample analysisOperational trainingWhen Therminol heat transfer fluids are used within suggestedwe can help improve system design, promote safety, and reducetemperature limits, they may provide years of trouble-free service.overall cost. Customers can take advantage of Eastman’s heatTo help users get maximum life, Eastman offers testing oftransfer system operation and product training programs. Thesein-service heat transfer fluids to detect contamination, moisture,programs are customized to suit the varied needs of frontlinethermal degradation, and other conditions that may impacttechnicians, operations supervisors, and maintenance technicianssystem performance. This comprehensive analysis includesto design engineers. Customers can also receive training assistanceacid number, kinematic viscosity, insoluble solids, low boilers,for dealing with important topics like fluid safety and handling.Eastman believes that by sharing our experience with customers,high boilers, and moisture content. Additional special analysesare available on request. Sample analysis includes samplecollection kits that are easy to use. Most systems should beSafety awareness trainingsampled annually. Users should also sample anytime a fluid-At Eastman, we’re “All in for Safety.” We provide our customersrelated problem is suspected.safety awareness training that focuses on the design, start-up,operation, and maintenance of heat transfer fluid systems.Results of the test are presented in a detailed report that providesStart-up assistancesuggestions for corrective action. Test results are stored in aEastman provides start-up assistance by reviewing proceduresdatabase for future reference. Customers can access their specificand offering suggestions to reduce typical problems. Customerstest information via my.therminol.com.can also receive help by calling their local Eastman technicalspecialist or through on-site assistance.Technical service hotlineExperienced technical service specialists can help answer yourFlush fluid and fluid refillquestions regarding heat transfer fluid selection, system start-ups,Liquid phase heat transfer systems can be cleaned with Therminol system design, and operational issues.FF flushing fluid. After the system is flushed, the appropriate liquidphase Therminol heat transfer fluid can be added.System design supportEastman regularly assists some of the world’s largest engineering,Fluid trade-in program*chemical, and equipment manufacturing companies on the designAs part of our commitment to sustainabilityand operation of heat transfer systems. Our liquid phase andand the environment, Eastman offers a trade-in program for usedvapor phase design guide information and system design dataTherminol and competitive heat transfer fluids. Depending on thehave been field tested in numerous installations. Eastman alsofluid and its condition, it may be turned in for potential creditconducts engineering seminars for customers, engineering firms,towards the purchase of new Therminol heat transfer fluid.and equipment manufacturers to cover a wide range of heat*Available in North America. Contact your local sales representative for more information.transfer fluid system design and operation issues. Customers canrequest a technical service visit to audit heat transfer systems forfluid loss and leak prevention opportunities.
For more information, visit our website, Therminol.com.North AmericaSolutia Inc.A subsidiary of Eastman Chemical Company575 Maryville Centre DriveSt. Louis, MO 63141 U.S.A.Telephone:Customer Service, 800-426-2463Technical Service, 800-433-6997Latin AmericaSolutia Brasil Ltda.A subsidiary of Eastman Chemical CompanyRua Alexandre Dumas, 1711—Birmann 12—7º Andar 04717-004São Paulo, SP, BrazilTelephone:Brazil, 0800 55 9989Other Locations, 55 11 3579 1800Eastman Corporate HeadquartersP.O. Box 431Kingsport, TN 37662-5280 U.S.A.U.S.A. and Canada, 800-EASTMAN (800-327-8626)Other Locations, (1) 423-229-2000www.eastman.com/locationsEurope/Middle East/AfricaEastman Chemical B.V.Watermanweg 703067 GG RotterdamThe NetherlandsTelephone: 31 10 2402 111Asia PacificEastman (Shanghai) ChemicalCommercial Company Ltd.Building 3, Yaxin Science & Technology ParkLane 399 Shengxia RoadPudong New District201210, Shanghai, P.R. ChinaTelephone: 86 21 6120 8700Although the information and recommendations set forth herein are presented in good faith, Eastman ChemicalCompany (“Eastman”) and its subsidiaries make no representations or warranties as to the completeness oraccuracy thereof. You must make your own determination of its suitability and completeness for your own use,for the protection of the environment, and for the health and safety of your employees and purchasers of yourproducts. Nothing contained herein is to be construed as a recommendation to use any product, process, equipment,or formulation in conflic
Therminol 66 is noncorrosive to metals commonly used in the construction of heat transfer systems. While Therminol 66 has a relatively high flash point, it is
