Document p2Bq09owKedzaOjMgdz4Ba4dD

Vi 4 iton Fluoroelastomers Specifying the Right Materials of Construction for Nonmetallic Flue Duct Expansion Joints -------------- Technical Information OPtahrefrorNmaannfcievoCrainpaatbeiditHeysdroofcFalruboornoEsllaassttoomemrasvrss. Elastomer foo duct expIansI onjoE nt prM ovideAarumber | light weight, ease of installation, superior abrasion resistance, and much higher a design flexibility in terms. JIeotliiansstitsmopJmooeirrnttacsnatmnatbodeerueasrleiozdem,inahntohyweeovmfeartn,hueftshaeactatauasrnetyoosmfyenetrxhspeatanirsceion virtually identical in appearance, but will vary drasticallyin tdheetiaripsewrhfyorimtanccreictaipcaabillmitpioesr.taTnhte tfoolrleocwoigngnidzieschuession differences between the various elastomers and make ceexrptaanisnitohnajtotnhteapprpolpiecratmiaotnesrial is used for specific Thesynthetic elastomers sted inTab1lvaery sviagrniiofuiscacnltalsysienstoefrmchseomfitchaelis raensdisutasnceDtiofhfeeraetnatntdypes of aastomewrisl or ample, exhbit consderably ferent `capabilities in terms of resistingpropertydegradation caubyesxpeosudre toheatandacid DTaebsliegn1a.tSiyonntshetic Elastomers and Their ASTM = IE ] Fioroslastomer FM Siicone wa EthenePropylene EPorEROM ReChlorosulfonated Polyethylene: xCsM Buty IR Epichoronyiin co Nie ner rFeisgiusrtea1dnceepfiorcwtiscarnezlaattiveesbaatisnegdoofnheaatnuamnbdearcoifd dmiafxeiremnutmctleamspteormaetrusrTehaet -washaofiwtihceacncihzahatterewpirlerseetnatisn aat least 100% elongation at break after a 70-tv oven aging. aThbeiXt-aoxriessriesptraetsteanctks fa oremlaetxivpeosrautriengtooft3hmoelelaarsstuolmfuerrisc" acid at 70C (158 F) Figure 1. Comparative Rating of Heat and Acid Resistancefor Various Synthetic Elastomers 300 "1 | Ss | x ia 23 ix| wl oy yma FKM com Me com eco mw on a Ro3 lAciadRiesi2vstaonce ' < Chemours via Fuorosastonas Viton" fluoroelastomer provides an unequaled scloeanrtlyatthiosunpcerlimorsmsautemrpiaal ftorsaslndgsPcPIaCnALsONS 0 aggressive flue gas sevice. In addition the esulosf 10 yearosf testing na simulated flue gas test and more thhaavne2p5royveeanrtshoaftaVcittuoanl"sBe-rtvyipcee tiertphoelFymOeEr FiKnMduDsItrOyVOES isbaestsutpaeersrolioobnrget-eotteerhsmetsaoelbrdlveiirschdeeidtahtmaianntdecithuproelbimsseyprhsettnyeopmleuscsorefedFtSKoMY.ISt wicanize FKA The information presented in Figure 1 isbasedon two ferent, short-term test condilons, Whe these tests `shmoaryt.beteursmeafunlfdorredleattievremlyinmiindg abcaisdeltienmepecormaptaurriesounssa,ditnhe these testsdonot adequately show the ul degree cf| performance ferencesthat eistamong vulcanizate based on the various types of elastomers Either longer dtiefremreensttisatoerbmeotrweeesneveelraesatgoimnegrscoFnodriiexoanmsplbeet,teors shown iagniFniggufroer2w1i6c8avniinzoctonecsemntardaetewdistulffluuriocroaecliadsattom1e5r0afCt.er (302 F) shonedlitte change n physical properties The test samples based onal the other elastomers, however, werecompletely destroyed: Figure2.9% Retained PhysicalProporties After168 hr 24150 (302 F)inConcentratedSulfuricAcid > gio.o Ie $EF. 3 ofl ---- nooo Fron cr wo ren wd wo Type of Synthetic Elastomer Is SpecifyingFluoroelastomerGood Enough? pUnofforLtuenyatoedlya,sstpeocmiwfeyirinsgotthante`eesxeparntsyiotn jaoninttsosehalhlat tn ues coe the bestmate lo or he est ams wmardeertahpartaisn osnotmee2rtt0abenicngefsuoortooslahsatvoemboreoarn Viidttohnat joouyis bbeutcwohniscihdewreerde,thineifnadcutstirnyfersitoarninqduaarldiItnycartoweaohsianetgly techniques that wil guard against a buyers being supplied vith inferior material. LTohwe-rCeorsetFselvueorraolstleacshtvoimgeuresMtathearihaalvse. been used to manufacture cheaper lucroslstojominetsr These Cmoentshtorduscitnicolnusdjeoimnissetphratesaerntiagthitoninotfebremmsatoferil FnoKnMflucoornitneanttedtphoeluysmeeorsf;baennddtsheofinFcKorMpwoirtathiotnheofrv,arious atemcohurniatuseso,f ruesceldaitmoerdeFduKcMe smcartaeprAilnsycoonsetowfilthreesseu.lt in expansionioits that are inherently inferior to. all virgin ttheircpkonleysms.er FKMant of the appropriate weight and Bi-Materisl FDEJ Constructions Bimaterial FDEs, such as those that have FXM on the goansthseidaeirasnidea, cshiemappleyrw,ilelsnsohteaastraessiosntagnta5ellalsFtoKmMer sJeorivnitsceTbheelyocwan12h1oweCve[r2,5b0e suFi)taabnldesourchlotwy-pteemspoefrajotiunrtes: may be suggested as an option. a Reputable suppliers, that this typeof construction s Vitonjoint ora fluoroelastomerint. Instead, they wil paint ut that ies aslteossreexps ensive opt tion, boarsa eldovoenrFCKod Mmapnad ranat otsheerrv than100% FKM. LightweightFKM Another techviaue for providinglowercost FKM eexxpaamnpslieonfjoain1t/ds-iinnc(l6u.d4esmiro)untdhiicnkgjoofifntthsiscpkenceisfsieeds, Ftosr not uncommon to receivbidsonjoits that ultimately hmaevaesubreeen3/i1ns6toafncaensinwchher(e4.e8xmcemssi[v0e.l1y8h8eianv]ythgircka.deTshere of fabric reinforcement wereused,which significantly 2 vier Fuoroatonas `educed the amount of uoroslastomer nthe finshed jfoiignhtt. iEnxFpKerMiesnicmeplhyadsopnrootvehnoltdhaut FapKMljoonigntass htheaatviaerre. w7e0i5g,ht pcoonwsetrrupclatnitonesxpFeorrieexnacmepdl8e,59n%tahuermeido:fftoslate expansionjints within 18 months afte installation The specification for these ints said oly that they ere 10 bteoc*o1n/t4a-iinntthwicokp]lifelsuoofro6e4l-a0s2tfoimbeerrgTlhaesjsoiEnOtIswCeErMeGNftou.nd More than 70 joints were replaced with 114i tick j2o2i-nt0s2mfaibdeerwgilatshsVicltootnh", aFnKdMt,hecoynwseirsteinaglotfltwnopsleirevsiocfe 25 of 1994. Blends of Hydrocarbon Elastomers with FKM Asindicated in Figure 3, elastomer compounds that `lcaosnstiostmeofrFseKxMbibltemndaecdhwpiotohrleersshaeaxtpeannsdicvheehmyidcraolcarbon resistance than FDEJs made with 100% fuoroalastomes, The blonds depicted in Fi3gcuonsristeed of 75125 a bowed ererheery FIyKcMhmociaxrebdonirtuhbbcehrisorwoesruefofnoartmeadtpeoldyettohyplreonvei.deThthee maeirmuim rteseistoayncteet,o hEevaetnotnd2a5c%d aonydweemipglohyed presence of the rocarbonrbbersn the on FKM theessuctoendiinzasitganbifaiscaentdloy npo1or0e0r %restiosptoanhcmeetroVhiottoan cFdKtIh.an FiVaglucraen3i.zaRteesteBansteidofannP1hy0si0c%alFPlruooperroteilesasoftomvesr. BleonfFdKsM with Hydrocarbon ElastomersAfter 168 Hours at 150 C (302 F) in Concentrated H:S0, i120: = i 3 Sz w o Millcaastes. Re-Ground or Reprocessed FKM cAolnluemcbtieornorfesculpapmlaiteirosntoantdherersuoblbeerofincduursetdryFeKnMgascgreapi.n the. gRreoculanidmoerdrweidcuacnedi,zeadndscmriorpetdywpiitchavlirigsinmePcKhIa.riTcahlely resuling mtu than 50d to rubber processors conserably ower prices hanvan FM The isnacoprpnortaotiocnoofmproepurnodcemsesaesdu(rraebcllyaifmoecducveuslctahneiozetd tFeKarM resistance and elongation capabilities of the esuling w3i5c.a1n5i%za,tbey. wAesigshh,owofnrinecFliagiumreed4f,ltohreoaedldaisttioomneorfsscrlaipttle results ina significant lossof ho elongation These twophysical properties are critical characteristics foran expansion joint, particularalty the joint corners. Vcuolpcaanbiizeatseswitlhartahcakveanidnatdeeaqruiantaerheotaoesfloingghatsitorness, even in normal sevice, withinashort period of time. The incorporation of re round fluoroelastomer scrap inFKM compounds does not signcantlydegrade IthneadhdetatiornestihsetuasneceooffrefclluaoirmoecdlFasKtNomsecrraipc,aenivzeantet diselbeatseerdioouns pefoflecytmoenrtFhKeMa,ciidlrehsaivsetannlceyoafmtohdeerreasutleting wicanizte. Hower the inherent disadvantage ncured breYstihsetainncceortpootreaatriannodftrheecaibiiml.ynttoefrlmexsowfitdhoeugtrabdreeadking tahtahtiegxhpatnesmipoenratiurnessdios souftficcoinetnatirnenasyonreoprreoncseusrsiendg Fit scrap. Figure 4. Efof f Reeproccessted FKMScrap on HighTemperature Vulcanizate Elongation fuor o ai2H5 -uwoo o5ns0> 0J l | [ TSCTos1t2T5emCpReSrTaNtur1e78C08 3 vier [-- Howto Specify Fluoraslastomerfor Use in FDEJs The previous discussion outlwhiynVietodr" fexupoarnoseiloansjtooimnetrs iusstehde ibnehsitgmha-tteermipaelraotfucrheo,ihcieghfloyr corrosiveflue gas How then do buyers ensure that the expansionints theyhaveordered vil be based onthe o1p0t0im%uvmircgoinmtpeorupnodlyfmoerrmuFlKatMi,onc:uroendewtihtahttchoensbiisstpsheonfol cofurwehiscyhscteamn?bTehuesreedarteo seenvseurraeltahpap,rofaxchpeasn;sainoynjooniets madewithVito floroelastome are specified, igh: quality jointswil be supplied FluidSealingAssociation SpecificfaotriFoKnM Used iOvneFrDtEhSst sera years Chemours haswrked closely with other memberosf the Fluid Sealing Associaton[FSA) todevasetalndoarpd for the fluoroelastomer portioonf FOES that are marketed Vion" orfuorodosomer jon Tha FSA recent issasutaendadrd that addresses sionFSADcSourHs hOo LrGo0ls9er a co ssa Figenatau caisson es 0n 100% virgin fucroelastomer terpolymer of atleast 685%, byweight fluorine content. In preparing elastomer waidldceadniztoattehse, baausmebpoelrymoefro,tihnecrlumdaitnegriclusreasryesgteenmermaelltyal oxides (which aciltatgcross nkingl and a file to iacmcperpotvaebmleechfialneircfaol usstreenigntahc)i.dCsaerrbviocnebTlahcekFisStAhsetoannldyard further spacifies that the polymer compound shall emer (the remaining 30% will consist of ther compounding type of cure system shall be used and that roamount of rfeuporrooceelsassetdomoerrrpeo-lgyromuenrdisflaucocreopetalbalset.omerscrapor nonThe standard lists requiredminimum valuesforvarious. sppheycsiifciaclaptrioopnetrotiheeslapnednisurantehxacteollnelnyttbheashsigfhoersat auality FRM joairesnuptplised Volume Increase TestsinToluena and Methanol As part of an efor to provid the power industry with fmelanusboywrhoicsh clionufaelrdsiborte-adoueanmittyiejeodri,ntCs hbeeimnugrssoddevaseloped mtweothsoidmpDle47fl1u)idTihmemesretseisotnstaersetsc(abpaasbeldeoonf dAeStTerMmitneistng `whether or not theelastomer portion ofan expansion Joint construction based entirely on fluoroelastomoer oifnsFtKeaMd abnadsehdyooncaahrybcoknocraubrbbeorn. rTuhbebteerostrsacacnomablisnoation ciondnisciastteswohfeathteerrptohleymeexrpoarnspioolnyjomientritytpse abnadsecdanonseFrvKeM:, tcorinydicate the presence of undesirable dipolymer FKM VUNTates based onal ypes of flucroelastomer e7x]hi0bi!t ou2t5st1a2nd0i0ng0riesicstaenceTtooaaorommaartiecffluisds. WhFeINnE 1 ECAA aLosshon 20% 10 (oone0 FAAS bares bolle ftoe pgy oanruor,l f hhshit vo ncoss snl in excess of 100% lease roe theuseof a logarithmic sca to depict volume increzsel. Thi simple t<es0tCclFearly differentiates between FKM and hydrocarbon Figure 5. % Volume IncreaseforVarious Elastomerins Methanol and Toluate2n3eC (73 F) | ooo |b - | x Ei * o Sane 60 a Sra TypeofElastomer 4 vier Fuorostonas The reinforcementmaterialsused in FDEJs donot Tshiupsf,itchanstsymapflfeecttetshtecvaanlbveesuosfevdoIlnucmheeicnkcrneaasieN.Shed `jeoxtp,anscioonnsiiositnitngcoonfsettrhuectrisoinnsg.leA:soarmdpoluebolfeadn aFcDtEuIaGlIZsS. aramid,orwire reinforcement, wil exhibit substantial 110 sTahmse,vfoalusommepilnecroefaasne eaxsptahneseiloansotionmteerxhCiobimtpsonevnotluomnel.. sioncmreeaasme ogurneattoefrhthyan c25o9%cnaicratbeissotrhenasteunattbeliebatshteerras a component of ablend or as one of the plieos, layerso,f| thejont While al fluoroelastomers exhibit excellent resistance to aromatic fluids, such as toluene, wicanizates based ond asingditfeircpaonltyymdeir(feAraenntddBegtryepeess)ooffvfolluuormoeeilnacsrteoamseereinxhibit tmeemtphearnaotlurAef,tearwiicmamreirzsiaotneibnamseetdhoanno1l0fo0r%7t0erepoaltyrmeoro,m VviictaorniBz-attyepeb,awsileldtoypniacadliloyealxyhmiebri,t olerss Atthyapen,4ho0w%evsewerllw.ilA F`DshEoJwvcoloumnesintcrreaesuxehicrbainttgsiivnogolfurnmoem 8in5c-r1ea0s5e%i.nmTehtush,anidf lan inexcess of 40% ts ikely tha the wicanizate contains `psoolmyemearmoorunnthtof dfoorymomfersoamteearmoausnatpooofricnchooripcoreaotfedb,ase reprocessed, dipolymer FKM scrap. Summary FGlasmoaroneiansgtfoomserduiscttheexbpeasntsicohnooicte ofspmpaItecraitaolnssf.or oSpuetwpriivetoerntcpyrpeiefcsioosfrfelfmylinuooartcoientlgaawasehrttioocmnrheiormteaoxt1pe0rabnineasloissouandejotinnotbstemuuissted cseeifitcoastpiaocntsyftorhffuoolroomsilnagstomerexpansion ois, be *Only 100%virgin terpolymer fuoelastcoonmteairn: 1792t 1005 68% by weight. fluorineisused. + The elastomer compound shal contain no reprocessed fhoroelastomer scrap. + The elastomer compound shall contain ronon- floroelastomer, ydocarbon rubber. Tmhuestelcaosnttaoimner7c0o%m,pboyuwnediguhstedofitthhee(e1x0p0%avnisgiiinonnt `TwhrepcrleymamienriFngM.30% of the castomercompound must `accocnesipsttoorn,lpyroofcceasrsboidnsb,laacnkdfuillrer,emset.al oxide acid Soomhp Poconts of temaialsusedin the manufacture of request * s Vir Fucrostomers FormoreinformviasittViitoonnco,m ShoranannraTrrinegBsraa adnlsoatorrgcraeeeddsonsirht,onsCuTselo veos obog5thPfce sbTytpay orrsaoLgerrTcrc1r8t l[onehar srctrGs rn kor 101 ccna eon aGe 053 PWRTT F HS TRO A AFRIR RSSRINCCT )ETEESNSE STRATEDAA FARAEASECGVEDANH 00 SEONG ROE 2018eChoice"araasses revodarks cpygtsf TehesCroan LCCrasndeCramsogre amaksof eurCrp. ce VIEHT3E04 00-0010 customs)