即風(feng)管耐火實驗需(xu)在劃定(ding)的(de)時候內知足(zu)蒙受300°C至1200°C的(de)完全性和隔(ge)熱性，才可鑒定(ding)其合適有關(guan)耐火極(ji)限的(de)請求。由此，催(cui)生(sheng)了各類耐低溫的(de)組合的(de)管道、防火板包裹風(feng)管等等，防排煙體系的(de)工程(cheng)造價也更上一(yi)層樓。

其實，盡人皆知(zhi)(zhi)如果(guo)根據(ju)有關的(de)規定，廚(chu)(chu)(chu)房排(pai)油(you)(you)煙(yan)(yan)(yan)系(xi)(xi)統(tong)系(xi)(xi)統(tong)送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)也(ye)一(yi)旦知(zhi)(zhi)足(zu)280℃時連(lian)續日常(chang)目(mu)(mu)標作(zuo)業(ye)(ye)(ye)30min的(de)中請，廚(chu)(chu)(chu)房排(pai)油(you)(you)煙(yan)(yan)(yan)系(xi)(xi)統(tong)系(xi)(xi)統(tong)送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)需(xu)與(yu)送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)進口清(qing)關處的(de)280°C廚(chu)(chu)(chu)房排(pai)油(you)(you)煙(yan)(yan)(yan)系(xi)(xi)統(tong)系(xi)(xi)統(tong)阻(zu)燃性閥加盟(meng)連(lian)鎖，當(dang)該(gai)閥敞開式時，廚(chu)(chu)(chu)房排(pai)油(you)(you)煙(yan)(yan)(yan)系(xi)(xi)統(tong)系(xi)(xi)統(tong)送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)應(ying)(ying)(ying)適(shi)當(dang)應(ying)(ying)(ying)對啟(qi)動。即有機(ji)(ji)(ji)廢氣水溫停(ting)靠280°C時阻(zu)燃性閥需(xu)用(yong)敞開式，送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)需(xu)用(yong)應(ying)(ying)(ying)對日常(chang)目(mu)(mu)標作(zuo)業(ye)(ye)(ye)，愛(ai)的(de)那(nei)么深(shen)管線需(xu)用(yong)知(zhi)(zhi)足(zu)蒙受水溫300°C至1200°C的(de)耐(nai)火階段中請的(de)意思就是在(zai)那(nei)？280°C時送(song)制(zhi)冷(leng)(leng)機(ji)(ji)(ji)都應(ying)(ying)(ying)對日常(chang)目(mu)(mu)標作(zuo)業(ye)(ye)(ye)了。