某管(guan)(guan)(guan)(guan)線設(she)計溫度為-46～80℃，如(ru)選用(yong)泡沫(mo)玻璃(li)，管(guan)(guan)(guan)(guan)道保(bao)冷(leng)厚度比聚(ju)氨酯厚，導致管(guan)(guan)(guan)(guan)道隔(ge)熱(re)后直徑增大，附塔管(guan)(guan)(guan)(guan)線排(pai)布(bu)間距增大，框架上配管(guan)(guan)(guan)(guan)布(bu)置(zhi)設(she)計困難；泡沫(mo)玻璃(li)密度較大，導致管(guan)(guan)(guan)(guan)線荷載增加。管(guan)(guan)(guan)(guan)道跨距減小，管(guan)(guan)(guan)(guan)道支架增加。這些因(yin)素將使得保(bao)冷(leng)材料、管(guan)(guan)(guan)(guan)道支架、結構、設(she)備費(fei)用(yong)增加。

 根據GB 50264《工(gong)業(ye)設(she)備及管(guan)道(dao)絕熱(re)工(gong)程設(she)計規范》和SH／T3010《石油化(hua)工(gong)設(she)備和管(guan)道(dao)絕熱(re)工(gong)程設(she)計規范》的(de)規定聚氨(an)酯推薦使用溫度為(wei)-65～80℃，因此(ci)，選用了聚氨(an)酯作為(wei)這根管(guan)道(dao)的(de)保冷材料。