Document jgoXRj64y0vy7bEEzE4yzrzb9

bss c. 9. Roter 1210 A. 9. hago 1A60 9. 0. irmrilnw oatobur 22, 1971 nun Co. osar Cody Thank you vary nush fop youp ptum Mil. X hats Insisted pP oup lonwmtloa, rutm autn of Thamlnol 59 in4 Thaawinoi 66 Utaraturu. X havu also ImIuM Himl toplM of oup auggMtad McpuMloa tak layout fop Uwh produats m pll m aoplaa of th* toxldty itituurt on both Thsndnol 59 ui Thwnd.no 1 66. As polntsd out Airing oup Muting on Suptuwbur 21. thu Thumlnol PR strlM fluids uontsln polyshlorlnatad biphonyls (rate) of various typM. Thu PCS sonusntrstion in oup wtirowsit has In*runslng ly sm undss ths tarstiny of various gousw--1 tsl scsMlss and suiuntlflu lsborstoriM. In iom atudlM. osptsia PCM havs bsun found to bu s pursistunt anvir Tenants! oontssinsnt and. possibly. injurious to auptaia fom of bird* aquatlo and aniaul Ufa, Aasopdincly it la vary lnpoptsnt that PC8a b# kspt out of ths food ohain. All uasrs of PCB-aontalnlng produuta nuat taka sxtraas oara to prsvant any antry into ths onvlromMnt through spills, lsakaga. usu. disposal, vaporisation or stharuls*. NS ara partisulsrly sonssmad ovsr ths lsakaga of this protest at your rail siding uhars it is ussd to mat pitan oars, vs fssl that adsguats sontrol of lsakags st this point oannot bu sarrlud outt thursfors. us souourags your sonaldarstlon of a ahangs to a non-PGi sontainlng fluid. Poptunatuly. your total aystun uostalM nultiplu. lndupsndant hMttng loops and lands ltsulf to a ssqusntlal shangs of hwt transfar fluid without a long latunwptloa of your opsratlon. A shangs to aithsr Thsndnol 99 or Tharnlnol 66 would sot raqulru asiop nodiflMtian to tha sxlatlag aystan. Natssisls of soMtvustion prosantly instsllsd ara sonpatlbl# with thaaa two MONS (m243 I fluids. I see only two areas that would require specific con sideration In the use of a non-PR type heat transfer fluid such as Therminol 55 or Therminol 66. These are the need for additional protective equipment to minimize fire risk and pro- teotlon of the hot fluid from air contact to minimize oxidative ' decomposition. Concerning the fire risk question, I see the need for either a C02 or steam snuffing system on the heater to provide a means to quench any abnormal fire conditions within the heater proper. A sprinkler system in the user and heater area may also be re quired. I would suggest you consult with your Insurer for the need of fire risk' protection equipment. The data provided on Therminol 55 and Therminol 66 gives flash, fire and autolgnitlon temperature points to assist in evaluating the degree of fire risk. The second area for consideration involves air contact with hot fluid at the expansion tank and at the tankcar heating station. The expansion tank3 for this system can be easily fitted with an inert gas blanket thus precluding air contact with hot fluid in the tank. At the rail siding, however, X feel we have a more difficult problem In that the hot fluid lines are discon nected after the car Is unloaded and retention of the fluid In the car coil has not always been successful. The admission of hot Therminol 55 of Therminol 66 into an empty pitch car coil certainly involves intimate air contact which can lead to oxi dative decomposition of the heat transfer fluid. This type of decomposition can bring about the formation of carbonaceous type particles in the fluid lines which would de tract from performance of the fluid after some period of time. To minimize air contact with hot fluid at the tank car heating station, I would suggest Installation of ball valves at the end of the flexible hose, so that fluid In the hose can be not only retained but protected from air contact, in the event fluid is lost from the tank car coll, I would recommend filling the empty coll with cooled fluid to drive the air out prior to introducing the hot fluid for heating the pitch. Unfortunately, the car heating area has the greatest leakage of PR fluid and is the one that will present the greatest prob lems on converting to a non-PR fluid. As an alternate to total changeover, I recommend you evaluate the possibility of converting the pitch car and pitch storage heating loop from PR to Therminol 55 or 66. Conversion of the other three Therminol PR-1 loops can be done at a later date, since these three loops do not have the degree of leakage ex perienced at the pitch car heating station. MONS 09*2<*4 D 3- - Both Andy Rego, our Thermlnol representative in Cincinnati, and me would be happy to work with you to accomplish a satis factory change from Thermlnol PR to a non-PR heat transfer fluid. We w;Lll schedule another visit with the people con cerned with,this situation at National Southwire, after you have had tiffle to review the data. In the interim, please feel free to call either Andy or me in the event you have any questions'. . Sincerely, cs Enclosures D. E. Roush Product Specialist Heat Transfer Fluids MONS 094245