選(xuan)擇防(fang)火(huo)卷簾門時最重要的因素是防(fang)火(huo)卷簾門的耐火(huo)極(ji)限(xian)。防(fang)火(huo)卷簾耐火(huo)極(ji)限(xian)的測試方法(fa)有(you)兩(liang)種(zhong)：

一是(shi)防(fang)火(huo)(huo)卷(juan)簾(lian)(lian)(lian)按照(zhao)現行國家標準GB7633《門和卷(juan)簾(lian)(lian)(lian)的(de)(de)耐(nai)(nai)(nai)火(huo)(huo)試(shi)驗方法》進(jin)行耐(nai)(nai)(nai)火(huo)(huo)試(shi)驗，包(bao)括(kuo)背(bei)(bei)火(huo)(huo)面(mian)(mian)(mian)溫(wen)(wen)(wen)升在內的(de)(de)各(ge)項判(pan)定(ding)(ding)條件判(pan)定(ding)(ding)；二是(shi)同樣按照(zhao)GB7633進(jin)行耐(nai)(nai)(nai)火(huo)(huo)試(shi)驗，根據(ju)該標準中關于無隔熱(re)(re)保護(hu)層的(de)(de)鐵(tie)皮卷(juan)簾(lian)(lian)(lian)免測背(bei)(bei)火(huo)(huo)面(mian)(mian)(mian)溫(wen)(wen)(wen)升的(de)(de)規定(ding)(ding)和產品(pin)標準《鋼質防(fang)火(huo)(huo)卷(juan)簾(lian)(lian)(lian)通(tong)用(yong)技術條件》（GB14102－93）的(de)(de)要求，只以距(ju)背(bei)(bei)火(huo)(huo)面(mian)(mian)(mian)一定(ding)(ding)距(ju)離的(de)(de)輻射熱(re)(re)強(qiang)度和簾(lian)(lian)(lian)面(mian)(mian)(mian)是(shi)否穿(chuan)火(huo)(huo)來判(pan)定(ding)(ding)卷(juan)簾(lian)(lian)(lian)耐(nai)(nai)(nai)火(huo)(huo)極(ji)限(xian)(xian)(xian)的(de)(de)卷(juan)簾(lian)(lian)(lian)。按照(zhao)不包(bao)括(kuo)背(bei)(bei)火(huo)(huo)面(mian)(mian)(mian)溫(wen)(wen)(wen)升作耐(nai)(nai)(nai)火(huo)(huo)極(ji)限(xian)(xian)(xian)判(pan)定(ding)(ding)條件的(de)(de)非隔熱(re)(re)防(fang)火(huo)(huo)卷(juan)簾(lian)(lian)(lian)，所得(de)(de)耐(nai)(nai)(nai)火(huo)(huo)極(ji)限(xian)(xian)(xian)數據(ju)，遠比包(bao)括(kuo)背(bei)(bei)火(huo)(huo)面(mian)(mian)(mian)溫(wen)(wen)(wen)升作耐(nai)(nai)(nai)火(huo)(huo)極(ji)限(xian)(xian)(xian)判(pan)定(ding)(ding)條件的(de)(de)隔熱(re)(re)型防(fang)火(huo)(huo)卷(juan)簾(lian)(lian)(lian)的(de)(de)耐(nai)(nai)(nai)火(huo)(huo)極(ji)限(xian)(xian)(xian)要長得(de)(de)多(duo)。

根據測試方法將防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)劃分為(wei)兩(liang)類，即：普(pu)通(tong)防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)和特級(ji)防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)，普(pu)通(tong)防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)不(bu)以(yi)(yi)背(bei)火(huo)(huo)面溫升(sheng)為(wei)判(pan)定條(tiao)(tiao)件，耐火(huo)(huo)極限不(bu)低于3h時，能(neng)達到隔(ge)熱防(fang)(fang)(fang)(fang)火(huo)(huo)分隔(ge)的要(yao)求(qiu)；而特級(ji)防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)以(yi)(yi)背(bei)火(huo)(huo)面溫升(sheng)為(wei)判(pan)定條(tiao)(tiao)件，當耐火(huo)(huo)極限不(bu)低于3h時，則具有(you)隔(ge)熱功能(neng)，能(neng)達到防(fang)(fang)(fang)(fang)火(huo)(huo)分區(qu)(qu)分隔(ge)的要(yao)求(qiu)。由于普(pu)通(tong)防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)的隔(ge)火(huo)(huo)作用達不(bu)到防(fang)(fang)(fang)(fang)火(huo)(huo)分區(qu)(qu)分隔(ge)的要(yao)求(qiu)，若采用這種防(fang)(fang)(fang)(fang)火(huo)(huo)卷(juan)(juan)簾(lian)，應在(zai)卷(juan)(juan)簾(lian)兩(liang)側設獨立的閉式自(zi)動噴水系統或水幕保護。

消(xiao)防(fang)產品市(shi)場防(fang)火(huo)(huo)卷簾(lian)(lian)(lian)生產廠(chang)(chang)家(jia)眾多，有的廠(chang)(chang)家(jia)提供的普通防(fang)火(huo)(huo)卷簾(lian)(lian)(lian)耐火(huo)(huo)極限可(ke)達(da)3h、4h，根據廠(chang)(chang)家(jia)提供的數(shu)據及國(guo)家(jia)有關部門檢(jian)測報(bao)告，一些設(she)計(ji)者(zhe)由(you)于不清楚防(fang)火(huo)(huo)卷簾(lian)(lian)(lian)的測試方法，誤以為防(fang)火(huo)(huo)卷簾(lian)(lian)(lian)耐火(huo)(huo)極限可(ke)達(da)3h、4h就可(ke)不設(she)保護(hu)設(she)施直接設(she)防(fang)火(huo)(huo)分區上。