Umkhiqizi wamapayipi ensimbi we-3PE we-Chinese 3PE
1. Yehlisa izindleko zephrojekthi
Ngokwezibalo zeminyango efanele, ngokuvamile, ipayipi lensimbi elifakwe i-polyurethane linganciphisa izindleko zephrojekthi cishe ngo-25% (usebenzisa i-FRP njengongqimba oluvikelayo) no-10% (usebenzisa i-polyethylene ephezulu kakhulu njengesendlalelo sokuzivikela).
2. Ukulahlekelwa ukushisa okuphansi nokonga amandla
I-thermal conductivity ye-polyurethane yile: λ= 0.013-0.03kcal/m · h · OC, ephansi kakhulu kunezinye izinto ezivame ukusetshenziswa zokufakwa kwamapayipi esikhathini esidlule, futhi umphumela wokufaka uthuthukiswa izikhathi ezingu-4 ~ 9. Ngaphezu kwalokho, ukumuncwa kwawo kwamanzi kuphansi kakhulu, cishe ku-0.2kg/m2. Isizathu sokumunca amanzi aphansi ukuthi igwebu le-polyurethane line-porosity evaliwe engaba ngu-92%. I-thermal conductivity ephansi kanye nokumuncwa kwamanzi aphansi, kanye nongqimba lokufakwa okushisayo okushisayo kanye ne-polyethylene ephezulu-density noma igobolondo elivikelayo le-FRP elisebenza kahle ngaphandle kwamanzi, kuguqule isimo "sokugqoka ijakhethi efakwe ukotini emanzi" yomsele wendabuko obeka ipayipi lokuhambisa ukushisa, futhi kakhulu. kunciphise ukulahleka kokushisa kukonke kwepayipi lokuhambisa ukushisa. Ukulahleka kokushisa kwenethiwekhi yokushisa kungu-2%, okungaphansi kakhulu kunesidingo esijwayelekile samazwe ngamazwe esingu-10%.
3. I-Anti corrosion, ukwahlukanisa okuhle nempilo ende yesevisi
Ngenxa yokuthi ungqimba lwe-polyurethane oluqinile lokufakwa kwegwebu luboshwe ngokuqinile esikhumbeni sangaphandle sepayipi lensimbi, ukungena komoya namanzi kungahlukaniswa, futhi umphumela omuhle wokunqanda ukubola ungafinyelelwa. Ngesikhathi esifanayo, izimbotshana zayo ezinamagwebu zivaliwe futhi ukumuncwa kwayo kwamanzi kuncane kakhulu. Igobolondo le-polyethylene le-high density kanye negobolondo le-FRP line-anti-corrosion enhle, i-insulation kanye nezakhiwo zemishini. Ngakho-ke, isikhumba sangaphandle sepayipi yensimbi esebenzayo sinzima ukuguguleka emoyeni wangaphandle namanzi. Uma nje ikhwalithi yamanzi yangaphakathi yepayipi iphathwa kahle, ngokusho kwedatha yangaphandle, impilo yesevisi ingafinyelela eminyakeni engaphezu kwengu-50, okuyi-3 ~ 4 isikhathi eside kunaleyo yokubeka umsele wendabuko kanye nokubekwa phezulu.
Uma kuqhathaniswa nendlela yendabuko yokufaka ipayipi lensimbi, ipayipi lensimbi eligqitshwe ngokuqondile linezinzuzo ezivelele kakhulu:
1.Ipayipi lensimbi elakhiwe ngaphambili eligqitshwe ngokuqondile alidingi ukwakha umsele omkhulu, kodwa lidinga kuphela ukungcwaba ipayipi le-insulated ngaphansi komhlaba, elinciphisa kakhulu ukusebenza komhlaba wephrojekthi, elisiza ekuvikelweni kwemvelo, linciphisa inani lokumbiwa komhlaba ngokungaphezulu. ngaphezu kwama-50%, futhi kunciphisa inani lezakhiwo zokwakha kanye nokhonkolo ngama-90%. Ngesikhathi esifanayo, ukwakhiwa kwepayipi lokufakelwa kwenziwa ngokuhambisana ne-trenching esizeni, futhi i-joint on-site kuphela edingekayo, enganciphisa isikhathi sokwakha ngaphezu kuka-50%.
2.Ukusebenza kokugcina ukushisa kuhle, futhi ukulahlekelwa ukushisa kungama-25% kuphela amapayipi endabuko. Ukusebenza kwesikhathi eside kungonga amandla amaningi futhi kunciphise kakhulu izindleko zamandla.
3.Inokumelana okuqinile kwamanzi nokugqwala. Akudingi ukunamathisela umsele wepayipi. Ingangcwatshwa ngokuqondile emhlabathini noma emanzini. Ukwakhiwa kulula futhi kuyashesha, futhi izindleko eziphelele ziphansi.
4. Futhi inokumelana nokugqwala okuhle kanye nokumelana nomthelela ngaphansi kwezimo zokushisa eziphansi, futhi ingangcwatshwa ngokuqondile emhlabathini oqandisiwe ongaphansi komhlaba.
5.Impilo yesevisi ingafinyelela eminyakeni engama-30-50. Ukufakwa nokusetshenziswa okulungile kungenza izindleko zokunakekelwa kwenethiwekhi yamapayipi zibe phansi kakhulu.
6. Isistimu ye-alamu ingasethwa ukuze ibone ngokuzenzakalelayo iphutha lokuvuza kwenethiwekhi yamapayipi, ibonise ngokunembile indawo yephutha kanye ne-alamu ngokuzenzakalelayo.
