Umbhobho we-thermoplastic oyomeleziweyo (RTP) ligama eliqhelekileyo elibhekisa kusinga oluthembekileyo oluphezulu oluthembekileyo (olufana neglasi, iaramid okanye icarbon), eyathi yaphuhliswa ekuqaleni koo-1990 nguWavin Repox, Akzo Nobel kunye neTubes d'Aquitaine yaseFransi, owathi. iphuhlise imibhobho yokuqala eyomelezwe ngefayibha yokwenziwa endaweni yemibhobho yentsimbi yoxinzelelo oluphakathi ukusabela kwimfuno ekhulayo yemibhobho engadleliyo ukuze isetyenziswe kushishino lwe-oyile negesi elunxwemeni, ngakumbi kuMbindi Mpuma. Ngokuqhelekileyo, izixhobo ezisetyenziswa ekwakhiweni kwesixhobo umbhobho usenokuba yiPolyethylene (PE), iPolyamide-11 okanye iPVDF kwaye unokomelezwa ngeAramid okanye iPolyester fiber nangona ezinye iindibaniselwano zisetyenziswa.
Kutshanje itekhnoloji yokuvelisa umbhobho onjalo, kubandakanywa ukuthengisa, ixhomekeke kwiinkampani ezimbalwa eziphambili, enye yazo yiPipelife eneSoluforce apho ifumaneka kwiikhoyili ukuya kwi-400 m (1,312 ft) ubude.Le mibhobho ifumaneka kwimilinganiselo yoxinzelelo ukusuka kwi-30 ukuya kwi-90 bar (3 ukuya kwi-9 MPa; 435 ukuya kwi-1,305 psi).Kwiminyaka embalwa edlulileyo olu hlobo lombhobho luye lwavunywa njengesisombululo esiqhelekileyo kwintsimbi ye-oilfield flowline applications yinkampani ezithile zeoyile kunye nabaqhubi.Inzuzo enkulu yalo mbhobho kwakhona ixesha layo lofakelo olukhawulezayo kakhulu xa kuthelekiswa nombhobho wentsimbi xa kuqwalaselwa ixesha welding njengoko isantya avareji ukuya kwi-1,000 m (3,281 ft) / ngosuku ziye zafikelelwa ukufaka RTP kumphezulu womhlaba.
Ngokusisiseko, umbhobho ubonelela ngenzuzo kwizicelo apho intsimbi inokugqabhuka ngenxa yokubola kunye nexesha lokufakwa ngumba.
I-PTFE yipolymer ye-thermoplastic, eqinileyo emhlophe kwiqondo lobushushu begumbi, kunye noxinano malunga ne-2200 kg/m3.NgokweChemours, indawo yokunyibilika kwayo yi-600 K (327 °C; 620 °F).[19]Igcina amandla aphezulu, ukuqina kunye nokuzithambisa kumaqondo obushushu asezantsi ukuya kutsho ku-5 K (−268.15 °C; -450.67 °F), kunye nokuguquguquka okulungileyo kumaqondo obushushu angaphezu kwe-194 K (−79 °C; -110 °F).I-PTFE izuza iipropati zayo kwisiphumo esidityanisiweyo sebhondi ye-carbon-fluorine, njengazo zonke ii-fluorocarbons.Ekuphela kweekhemikhali ezaziwa ukuba zichaphazela ezi bhondi zekhabhoni-fluorine zizinyithi ezisebenza kakhulu njengeentsimbi zealkali, kwaye kumaqondo obushushu aphezulu ngokunjalo nezinyithi ezifana nealuminiyam nemagnesium, kunye neearhente zokuthambisa ezifana nexenon difluoride kunye necobalt(III) fluoride.
I-coefficient of friction yeeplastiki idla ngokulinganiswa ngokuchasene nentsimbi ekhazimlisiweyo.PTFE's coefficient of friction yi-0.05 ukuya ku-0.10, eyesithathu isezantsi kuyo nayiphi na imathiriyeli eyaziwayo eqinileyo (i-BAM iyeyokuqala, kunye ne-coefficient of friction ye-0.02; njengedayimane ikhabhoni ibe yeyesibini-ephantsi kwi-0.05).Ukuxhathisa kwe-PTFE kumandla e-van der Waals kuthetha ukuba kuphela kwendawo eyaziwayo apho iqilishe lingenako ukunamathela.Ngapha koko, i-PTFE ingasetyenziselwa ukuthintela izinambuzane ezikhwela imiphezulu epeyintwe ngezinto.I-PTFE imtyibilizi kangangokuba izinambuzane azikwazi ukubamba kwaye zidla ngokuwa.Umzekelo, i-PTFE isetyenziselwa ukuthintela iimbovane ukuba ziphume kwi-formicaria.
Ixesha lokuposa: Feb-27-2018