Polyurethane- cov kav dej insulated feem ntau yog siv nyob rau hauv ntev - kev thauj mus los deb- xws li hauv nroog cov cua sov, kev lag luam petrochemical, hauv cheeb tsam cua txias, thiab hauv nroog engineering- qhov twg lawv txo qis zog thaum thauj nruab nrab. Lawv cov txiaj ntsig tseem ceeb yog nyob rau hauv kev ua haujlwm zoo thermal rwb thaiv tsev: cov thermal conductivity sib txawv nrog kev ua haujlwm kub, ncav cuag tsawg dua lossis sib npaug li 0.025 W / (m·K) ntawm qhov kub thiab txias (kwv yees . 10 degree) thiab ua tau raws li qhov yuav tsum tau muaj tsawg dua lossis sib npaug rau 0.033 W / (m·K) ntawm kev ua haujlwm kub ntawm 50 degree.
Lub sab nrauv siab -density polyethylene (HDPE) casing muaj kev tiv thaiv zoo heev, tiv thaiv corrosion, thiab compressive zog, ua rau lub neej tsim kev pab ntawm 30 txog 50 xyoo. Factory prefabrication thiab ncaj qha - faus installation txo qhov ntim ntawm excavation ntau tshaj 50%, uas ua rau txo nqi tag nrho thiab siv sij hawm luv dua. High-cov haujlwm profile-xws li Taiyuan-Taigu koog tsev kawm ntawv cov cua sov tswv yim (ib 37.8 km ntev-kab cua sov nyob deb) thiab kev siv loj 2.4-meter- txoj kab nruab nrab ntawm cov kav hluav taws xob hauv Liaocheng, Shandong's high efficiency{16} thiab kev ua haujlwm siab kev ntseeg tau. Nws yuav tsum raug sau tseg tias cov khoom no yog tsim los rau loj - cov kav xa dej loj thiab tsis haum rau cov tsev nyob hauv cov yeeb nkab hauv tsev. Ua raws li cov qauv hauv tebchaws xws li GB/T 29047-2021, polyurethane-insulated kav tau dhau los ua cov khoom siv hluav taws xob tseem ceeb rau niaj hnub nroog "lifeline" infrastructure.