Ipayipi le-thermoplastic eliqinisiwe (RTP) yigama elijwayelekile elisho ifayibha yokwenziwa enamandla aphezulu (njengengilazi, i-aramid noma ikhabhoni), eyaqalwa ekuqaleni kwawo-1990 ngu-Wavin Repox, u-Akzo Nobel kanye no-Tubes d'Aquitaine waseFrance, owasungulwa. uthuthukise amapayipi okuqala aqiniswe ngefayibha yokwenziwa ukuze athathele indawo amapayipi ensimbi anomfutho ophakathi ukuze kuphendulwe isidingo esikhulayo semigudu engagqwali ukuze isetshenziswe embonini kawoyela negesi yasogwini, ikakhulukazi eMpumalanga Ephakathi. Ngokuvamile, izinto ezisetshenziswa ekwakheni i- ipayipi lingase libe yi-Polyethylene (PE), i-Polyamide-11 noma i-PVDF futhi ingase iqiniswe nge-Aramid noma i-Polyester fiber nakuba ezinye izinhlanganisela zisetshenziswa.
Muva nje ubuchwepheshe bokukhiqiza ipayipi elinjalo, okuhlanganisa nokumaketha, bulele ezinkampanini ezimbalwa ezibalulekile, enye yazo iPipelife with Soluforce lapho etholakala khona ngamakhoyili afinyelela ku-400 m (1,312 ft) ubude.Lawa mapayipi atholakala ezilinganisweni zokucindezela kusuka ku-30 kuya ku-90 bar (3 kuya ku-9 MPa; 435 kuya ku-1,305 psi).Eminyakeni embalwa edlule lolu hlobo lwepayipi luye lwamukelwa njengesixazululo esijwayelekile esihlukile sensimbi yezicelo ze-oilfield flowline yizinkampani ezithile zikawoyela kanye nabaqhubi.Inzuzo enkulu yaleli payipi futhi isikhathi salo sokufaka esishesha kakhulu uma kuqhathaniswa nepayipi lensimbi uma kucatshangelwa isikhathi sokushisela njengoba isivinini esimaphakathi esifika ku-1,000 m (3,281 ft)/ngosuku sifinyelelwe ngokufaka i-RTP endaweni engaphansi.
Ngokuyinhloko, ipayipi inikeza inzuzo ezinhlelweni zokusebenza lapho insimbi ingase iqhume ngenxa yokugqwala kanye nesikhathi sokufakwa kuyinkinga.
I-PTFE i-polymer ye-thermoplastic, eqinile emhlophe ekamelweni lokushisa, enokuminyana okungaba ngu-2200 kg/m3.Ngokusho kwamaChemours, indawo yayo yokuncibilika ingu-600 K (327 °C; 620 °F).[19]Igcina amandla aphezulu, ukuqina kanye nokuzithambisa emazingeni okushisa aphansi kuze kufike ku-5 K (−268.15 °C; -450.67 °F), futhi ikwazi ukuguquguquka kahle emazingeni okushisa angaphezu kuka-194 K (−79 °C; -110 °F).I-PTFE izuza izakhiwo zayo kusukela kumphumela ohlanganisiwe webhondi ye-carbon-fluorine, njengoba kwenza wonke ama-fluorocarbons.Amakhemikhali okuwukuphela kwawo aziwa ukuthi athinta la mabhondi e-carbon-fluorine ayizinsimbi ezisebenza kakhulu njengezinsimbi ze-alkali, futhi emazingeni okushisa aphezulu nezinsimbi ezinjenge-aluminium ne-magnesium, nama-fluorinating agents afana ne-xenon difluoride ne-cobalt(III) fluoride.
I-coefficient yokushayisana kwamapulasitiki ngokuvamile ikalwa ngensimbi epholishiwe.I-coefficient ye-PTFE yokungqubuzana ngu-0.05 kuya ku-0.10, okuyindawo yesithathu ephansi kunanoma iyiphi into eqinile eyaziwayo (i-BAM ingeyokuqala, ene-coefficient yokungqubuzana okungu-0.02; njengedayimane ikhabhoni ibe isibili-phansi ku-0.05).Ukumelana kwe-PTFE namandla e-van der Waals kusho ukuthi iyona kuphela indawo eyaziwa isigcilikisha esingakwazi ukunamathela kukho.Eqinisweni, i-PTFE ingasetshenziswa ukuvimbela izinambuzane ezikhuphuka phezulu ezipendwe ngezinto.I-PTFE iyashelela kangangokuthi izinambuzane azikwazi ukubamba futhi zivame ukuwa.Isibonelo, i-PTFE isetshenziselwa ukuvimbela izintuthwane ukukhuphuka ziphuma ku-formicaria.
Isikhathi sokuthumela: Feb-27-2018