Insulated kav yog tsim rau thauj ntau yam xov xwm nyob rau hauv ib tug kub ntawm -50 degree mus rau 150 degree . Lawv tau dav siv nyob rau hauv centralized cua sov thiab cua txias systems, kub roj tsheb thauj mus los, raws li zoo raws li rwb thaiv tsev thiab tub yees tej yaam num nyob rau hauv greenhouses, txias cia chaw, thee mines, petrochemical, thiab lwm yam lag luam.
Vim lub nruj adhesion ntawm polyurethane nruj npuas rwb thaiv tsev txheej rau sab nrauv ntawm cov yeeb nkab steel, cov yeeb nkab insulated zoo thaiv qhov nkag ntawm huab cua thiab dej, muab kev tiv thaiv corrosion zoo heev. Ob qho tib si high-density polyethylene (HDPE) thiab fiberglass reinforced yas (FRP) cov plhaub sab nrauv pom muaj kev tiv thaiv corrosion, rwb thaiv tsev, thiab cov khoom siv kho tshuab. Tsis tas li ntawd, lub kaw-cell qauv ntawm cov npuas dej ua kom muaj kev nqus dej tsawg, ua rau nws nyuaj rau sab nrauv ntawm cov yeeb nkab steel ua haujlwm kom corroded los ntawm sab nraud cua thiab dej.
Lub neej kev pab cuam ntawm cov kav dej insulated tuaj yeem ncav cuag ntau dua 50 xyoo, uas yog 3 mus rau 4 npaug ntev dua li ib txwm trench lossis overhead installation txoj kev. Piv nrog rau lwm cov khoom siv rwb thaiv tsev uas siv cov yeeb nkab yav dhau los, tus nqi qis dua, thaum cov nyhuv rwb thaiv tsev tau txhim kho los ntawm 4 mus rau 9 zaug. Tsis tas li ntawd, nws cov dej nqus dej qis ntawm kwv yees li 0.2 kg / mg / m2 yog nyob rau lub siab kaw cell cov ntsiab lus ntawm polyurethane ua npuas dej, uas tuaj yeem ncav cuag ib puag ncig 92%.
Cov kav dej rwb thaiv tsev tshem tawm qhov xav tau rau cov trenches loj, vim lawv tuaj yeem tsuas yog faus hauv av, txo cov av ua haujlwm thiab khawb qhov ntim ntau dua 50%, nrog rau kev siv engineering thiab kev ua vaj tse los ntawm 90%. Tsis tas li ntawd, kev ua cov kav dej insulated thiab kev khawb hauv qhov chaw tuaj yeem ua rau tib lub sijhawm, tsuas yog kev sib koom ua ke ntawm qhov chaw yuav tsum tau ua, yog li txo lub sijhawm tsim kho ntau dua 50%.
Piv rau lwm cov khoom siv rwb thaiv tsev uas tau siv yav dhau los, tus nqi qis dua, thaum cov nyhuv rwb thaiv tsev tau txhim kho los ntawm 4 mus rau 9 zaug. Kev nqus dej tsawg, ua ke nrog cov thermal conductivity tsawg thiab cov plhaub tiv thaiv ua los ntawm high-density polyethylene los yog fiberglass reinforced yas nrog kev ua tau zoo waterproof, hloov cov tsoos "ntub paj rwb tsho" qhov teeb meem ntawm trench-ntev cua sov kav, drastic txo. zuag qhia tag nrho cov cua sov poob ntawm cov cua sov pipeline. Lub tshav kub poob ntawm cov khoom siv hluav taws xob hluav taws xob tsuas yog 2%, uas yog tsawg dua li cov txheej txheem thoob ntiaj teb xav tau ntawm 10%.
Hauv cov ntsiab lus, cov kav dej insulated muaj kev tiv thaiv corrosion zoo heev, kev ua haujlwm rwb thaiv tsev, thiab kev pab lub neej ntev. Qhov nruj adhesion ntawm polyurethane nruj npuas rwb thaiv tsev txheej rau cov yeeb nkab steel zoo tiv thaiv kev nkag mus ntawm huab cua thiab dej, muab kev tiv thaiv corrosion. Cov qauv kaw-cell txo qis kev nqus dej, thaum HDPE thiab FRP cov plhaub sab nraud muab kev tiv thaiv ntxiv. Nrog rau kev kho dej kom zoo nyob rau hauv cov kav dej, lub neej kev pab cuam ntawm high-temperature prefabricated ncaj qha faus insulated kav yuav ntev tshaj 50 xyoo, ho outperforming tsoos trench los yog overhead installation txoj kev.
