Document ByGR9EMbn0BrzgpjNMKELBVNw

bcc 1H00 D. R. Hanson C. Patcn/D. B. R ush 32RD P. V. Oann 1800 C. Boutin January 14, 1972 Mr. R oart H avali C :1 rad *11 C . a x ;49 Danvar, C 1 rad 30202 Dear Mr. 3 swell: Confirming your Inquiry >n January 10, 1972 o roaming o.nverl >n f y >ur Thermln'1 MR boat transfar system, I nava anal sea Utaratura n tw possible replacement fluids, M nsanc 's Thermln l 55 and 66. Thermln >1 55 should ba satisfactory baaad n y ur normal operating tamparaturaa T up t > 500*M. Whan c nvertlng y ur ayataai to Therein;1 55, y u ah uld th r u,-hly drain tha Therein >1 MR (draining aam tanda t. lneraaaa affectlvenose f ttal draining), flush tha piping, equipment and expansion tank and again drain Into leak-fraa druma and than aaal. Ba aura tha outside T tha drums ara fraa f matarlal. ve request y >u uaa druma that moat DOT 17B Specification (55 r.all n druma, 18 guage minimum, 2 bung head; 5 gall n drums, 24 guaga minimum). A flush with Therein. 1 55 w :u)d ba advantageous baaausa It w uld all y .'u t -parate tha aystsm at temperature Tor a period if tlma t* lo.sen any raaldual MR fr m tha ayataai. An a1 tarnstafflushing aatarlal would ba seat no r xyl 1; h sever, thay ah uld n t ba haatad f <r flushing. Pices# uaa the and sad labels, disposal only, f r shipping thaaa drums f uaad MR and fluahing fluid, and ship e llaet t < tha addraaa ahwn. Honsant will pay freight coats Inaurrad and will properly dispose of tha material, fraa of aharge, by high tamparatura Incineration. To Insure proper dlspaltl.n f tha fluid, claaaa advise one f .ur Heat Transfer Specialists, 314-694-2514 at tlma >f return. Any unopened druma of Therein ol MR series produets ( rlglnal drum aaals must ba lntaat) will be accepted fr credit If re turned prior t.. March 1, 19*72. Please uaa tha foil .wing MONS 092316 -2- prcsdur* when returning PR fluid fop credit: 1. Contact a K.i wnti Hast Transfer Specialist (314-694-2514) giving him fluid type and number >f drums returned f ir credit. Altj ask f r return shipping lnatructl ns. 2. Using y ur npany label, Indicate Therein 1 type and dearly mark each label "returned for credit '. We underatand you may n t be able to return all your unused Theninol FR-1 bef >re the Kerch 1, 1972 cut-iff date. We can extend this deadline but we do suggest that y u have Therein 1 55 In stock so that a change o. uld be made as soon as weather permits or In the event :f major fluid l1 as. As a reminder, unlike the ThermIn <1 PR products. Therein :1 55 and 66 are nit classified as fire resistant heat transfer fluids. Consequently, you may wish to o insider the use :f protective devices t > minimise any added fire risks. I suggest y u c on sult with the insurer f y. ur pr perty relative t - this matter. A snuffing device should be considered for the combustion chamber of your fired heater. Steam or oarbn dioxide may ts usad to extinguish a furnace fire caused by e heater tube rup ture. The snuffing devise may be activated by a high tempera ture switch In your furmace stack. A sprinkler would ala be a g d suggestion f r the heater and piping spatam. In order to protect Thend.no 1 from unnecessary oxldatfeon, we suggest the use of an Inert gas blanket n yur expension tank ayatem to preclude air ccntaet with hot fluid. If y^u uaa a recirculating line to the expansion tank, thia should be valued a lead during the normal system upentl n. While b >th Thereinol 55 and 66 are mlaelble with Therein: 1 PR, we do n t recommend adding either fluid t. "t.p-up" an FR system except aa an emergency measure for a briar period f time. Addition of Thenlnl 55 >r 66 can oauae the mixture t lose lta fin resistant properties. Ala:, the useful life f Thermlnol 55 or 66 may be drastically reduced by reaction with tnoe quantities T add In tha Thcnnln l FR. we suggest you plan your onversln as soon aa possible. Tha Thermlnol PR fluids an no longer available and an not compa tible with >>thar haat trenefer fluids. Whan our oonvenlon bulletin bee mee available, a e py will be sent to y a. Thank you for your eo paretIon. Please feel free to contact aa If you have any additional questl;na. Sincerely, MONS 092317 ea oo Mr. Rscnbach J. J. Rodar Product Supervisor