某管(guan)(guan)線(xian)設計溫(wen)度為-46～80℃，如選用泡沫(mo)玻璃，管(guan)(guan)道(dao)(dao)保冷(leng)厚度比聚氨酯厚，導(dao)致管(guan)(guan)道(dao)(dao)隔熱后直徑增(zeng)大(da)，附塔管(guan)(guan)線(xian)排布(bu)間(jian)距增(zeng)大(da)，框(kuang)架(jia)上配管(guan)(guan)布(bu)置設計困難；泡沫(mo)玻璃密(mi)度較大(da)，導(dao)致管(guan)(guan)線(xian)荷載增(zeng)加。管(guan)(guan)道(dao)(dao)跨(kua)距減小，管(guan)(guan)道(dao)(dao)支架(jia)增(zeng)加。這些因素將使得保冷(leng)材料、管(guan)(guan)道(dao)(dao)支架(jia)、結構、設備費用增(zeng)加。

 根(gen)據GB 50264《工(gong)(gong)(gong)業設(she)(she)(she)備(bei)及管道(dao)絕(jue)熱(re)工(gong)(gong)(gong)程設(she)(she)(she)計(ji)規范(fan)》和SH／T3010《石(shi)油化工(gong)(gong)(gong)設(she)(she)(she)備(bei)和管道(dao)絕(jue)熱(re)工(gong)(gong)(gong)程設(she)(she)(she)計(ji)規范(fan)》的規定(ding)聚(ju)(ju)氨酯(zhi)推薦使用(yong)溫(wen)度為-65～80℃，因此，選用(yong)了聚(ju)(ju)氨酯(zhi)作為這根(gen)管道(dao)的保(bao)冷材料(liao)。