Ngophuhliso oluqhubekayo lwemimandla ye-oyile nerhasi engaselunxwemeni, imibhobho yokuthutha isixa se-oyile nerhasi engaselunxwemeni iyakhula.Okwangoku ukugquma imibhobho yenkwili esetyenziswa ikakhulu i-3LPE kunye ne-FBE.I-3LPE yokusetyenziswa kwexesha elide lobushushu alidluli kwi-70℃, ixesha elifutshane ukuya kuma-80℃.Ngokubhekiselele ekuthuthweni kwe-oyile ekrwada ubushushu bungaphezulu kwama-80℃, sebenzisa i-3LPE yokwaleka isakhiwo ngokucacileyo ayihambelani neemfuno zobugcisa.Ngelixa ukusetyenziswa kwexesha elide lobushushu FBE ukutyabeka inokufikelela 115℃, ukuhlangabezana nezi mfuno zobushushu boyilo olungentla, kodwa iFBE yokwambathisa iyaphuka, ukunganyamezeli umonakalo wothutho kunye nokubekwa kwemibhobho ekude nonxweme, ukonakaliswa kolwaleko oluchasene nomhlwa kubi kakhulu, Okwangoku imibhobho engaphantsi kolwandle ayikhuthazi ukusetyenziswa komhlwa ngokohlobo lwe umaleko omnye FBE.

Ukujongana ngokufanelekileyo neemeko zothutho kubushushu obuphezulu beengxaki zemibhobho engaphantsi kolwandle, amazwe angaphandle aphumelele ngempumelelo i-3LPP yesakhiwo sokugquma kumbhobho, njengeGulf of Mexico imibhobho enzulu yamanzi angaphantsi kolwandle kunye ne-UK North Sea yolwandle kunye nemibhobho yegesi yegesi, njl. njl., isetyenziswa 3LPP. Ulwakhiwo, kodwa i-3LPP yokwambathisa isetyenziswe kumbhobho ongaphantsi kolwandle elizweni akukho mzekelo.

I-Polypropylene ineempawu ezibalaseleyo zomatshini, isivuno sayo, i-tensile, amandla oxinzelelo, ukuqina, ukuqina kunye nokumelana nokunxiba kunoxinzelelo oluphezulu kwaye ngoko i-polyethylene (HDPE) iphezulu, kunye ne-polypropylene yokufunxa amanzi aphantsi kakhulu, amanzi 24h Ukufunxwa kwamanzi yi-0.01% kuphela, isezantsi kakhulu kuneHDPE.I-Polypropylene ixhathisa ukuzinza kweekhemikhali, ukugquma kombane, kunye noxinano oluphantsi kune-polyethylene.Ngokumalunga nokumelana nobushushu, ukusetyenziswa kwexesha elide kwe-polyethylene eguquliweyo kwiqondo lokushisa -30 ~ 110℃.I-3LPP iphuhliswe ngesiseko se-3LPE yokwaleka ekusebenzeni okugqwesileyo kwe-anti-corrosion coating.I-3LPP 3LPE umgaqo kunye nesakhiwo esifana naso esamkelwe kwi-fusion yensimbi engaphantsi kwe-epoxy (FBE), ukwandisa ukunamathela kwintsimbi, phakathi kwe-polypropylene copolymer adhesive (PPA) layer, kunye nomgangatho wangaphandle we-polypropylene (PP) ibhondi eyomeleleyo, kokubini ukuchasana okuphezulu kwisakhono sokonakala koomatshini, kunye nokuchasana kakuhle nokusebenza kokuqhawula i-cathodic.I-3LPP iguqulwe ngesakhiwo sokugubungela, ukusetyenziswa kweqondo lokushisa ngaphezu kwe-110℃, ukuchasana kwayo okugqwesileyo kwi-corrosion kunye nokusebenza kobushushu obuphezulu ukuphumelela amathemba emarike ebanzi, ubushushu obuphezulu bokugquma alwenzeli ezinye iintsilelo, ukuphumeza ubushushu obuphezulu kwaye kujongwe kwizicelo zamanzi anzulu, kuvela ngaphezulu kwe-anti-corrosion coating. kumazwe ngamazwe.