法(fa)蘭(lan)(lan)有(you)圓形(xing)和矩(ju)形(xing)兩種。在通(tong)風(feng)(feng)(feng)(feng)和空調系統(tong)中(zhong)，法(fa)蘭(lan)(lan)用于風(feng)(feng)(feng)(feng)管(guan)與(yu)風(feng)(feng)(feng)(feng)管(guan)、風(feng)(feng)(feng)(feng)管(guan)與(yu)配件(jian)(jian)(jian)、部件(jian)(jian)(jian)之間的(de)延長連(lian)接，同時(shi)對風(feng)(feng)(feng)(feng)管(guan)整體有(you)一(yi)定(ding)的(de)加(jia)(jia)固作用，保(bao)定(ding)不(bu)銹鋼方形(xing)共本法(fa)蘭(lan)(lan)風(feng)(feng)(feng)(feng)管(guan)定(ding)做，使安裝和維(wei)修(xiu)都很方便(bian)。法(fa)蘭(lan)(lan)用角鋼、扁(bian)鋼加(jia)(jia)工制成。隨著風(feng)(feng)(feng)(feng)管(guan)及(ji)風(feng)(feng)(feng)(feng)管(guan)配件(jian)(jian)(jian)、部件(jian)(jian)(jian)的(de)定(ding)型(xing)(xing)(xing)化，其連(lian)接件(jian)(jian)(jian)法(fa)蘭(lan)(lan)也已定(ding)型(xing)(xing)(xing)化。表中(zhong)列出了圓形(xing)和矩(ju)形(xing)風(feng)(feng)(feng)(feng)管(guan)法(fa)蘭(lan)(lan)的(de)標準規(gui)格及(ji)定(ding)型(xing)(xing)(xing)尺寸(cun)，可(ke)做加(jia)(jia)工預制的(de)依據。

玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)復(fu)合(he)(he)板(ban)(ban)內、外表(biao)(biao)(biao)面(mian)層(ceng)(ceng)與玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)絕(jue)熱材(cai)料(liao)(liao)(liao)粘結應(ying)(ying)牢固，復(fu)合(he)(he)板(ban)(ban)表(biao)(biao)(biao)面(mian)應(ying)(ying)能防止纖(xian)維(wei)(wei)(wei)脫落。風管內壁采(cai)用涂(tu)層(ceng)(ceng)材(cai)料(liao)(liao)(liao)時，其材(cai)料(liao)(liao)(liao)應(ying)(ying)符合(he)(he)對人體無害的衛生規定。風管內表(biao)(biao)(biao)面(mian)層(ceng)(ceng)的玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)布應(ying)(ying)是無堿(jian)或(huo)(huo)中堿(jian)性材(cai)料(liao)(liao)(liao)，并(bing)符合(he)(he)現行《無堿(jian)玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)、無捻(nian)粗紗布》JC/T281的規定。內表(biao)(biao)(biao)面(mian)玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)布不得有(you)斷絲、斷裂(lie)等缺(que)陷。風管宜采(cai)用整板(ban)(ban)材(cai)料(liao)(liao)(liao)制作(zuo)。板(ban)(ban)材(cai)拼接時應(ying)(ying)在(zai)結合(he)(he)口處涂(tu)滿膠(jiao)(jiao)液并(bing)緊密粘合(he)(he)；外表(biao)(biao)(biao)面(mian)拼縫(feng)處預留寬30mm的外護層(ceng)(ceng)涂(tu)膠(jiao)(jiao)密封(feng)后，車庫不銹鋼方形共(gong)本法(fa)蘭(lan)風管定做，用一(yi)層(ceng)(ceng)大于或(huo)(huo)等于50mm寬熱（壓）敏(min)鋁(lv)箔膠(jiao)(jiao)帶粘貼(tie)密封(feng)。接縫(feng)處單邊粘貼(tie)寬度不應(ying)(ying)小于20mm。內表(biao)(biao)(biao)面(mian)拼縫(feng)處可用一(yi)層(ceng)(ceng)大于或(huo)(huo)等于30mm寬鋁(lv)箔復(fu)合(he)(he)玻(bo)璃(li)纖(xian)維(wei)(wei)(wei)布粘貼(tie)密封(feng)或(huo)(huo)采(cai)用膠(jiao)(jiao)粘劑抹縫(feng)。

風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)工(gong)程量計算及定(ding)額(e)使用：　　用薄鋼(gang)板(ban)、鍍鋅鋼(gang)板(ban)、不銹鋼(gang)板(ban)、塑(su)料板(ban)等板(ban)材制作(zuo)安裝(zhuang)(zhuang)的(de)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)工(gong)程量，中央空調不銹鋼(gang)方(fang)形共本(ben)法(fa)蘭風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)定(ding)做，以(yi)施工(gong)圖(tu)(tu)圖(tu)(tu)示風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)中心(xin)線(xian)長(chang)度(du)(du)為準(zhun)，按(an)風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)不同斷面(mian)形狀(zhuang)(圓、方(fang)、矩(ju))的(de)展(zhan)(zhan)開面(mian)積計算，按(an)㎡計量。　　①風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)展(zhan)(zhan)開面(mian)積：不扣(kou)除檢查孔、測定(ding)孔、送(song)風(feng)(feng)口、吸風(feng)(feng)口等所占面(mian)積，咬口重疊部(bu)分也不增加。　　②風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)長(chang)度(du)(du)計算：一律以(yi)施工(gong)圖(tu)(tu)所示中心(xin)線(xian)長(chang)度(du)(du)為準(zhun)。包(bao)括(kuo)彎(wan)頭(tou)、三通、變(bian)徑管(guan)(guan)(guan)(guan)(guan)、天圓地方(fang)管(guan)(guan)(guan)(guan)(guan)件長(chang)度(du)(du)。支(zhi)(zhi)管(guan)(guan)(guan)(guan)(guan)長(chang)度(du)(du)以(yi)支(zhi)(zhi)管(guan)(guan)(guan)(guan)(guan)中心(xin)線(xian)與主管(guan)(guan)(guan)(guan)(guan)中心(xin)線(xian)交接點(dian)為分界點(dian)。風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)長(chang)度(du)(du)不包(bao)括(kuo)部(bu)件所占長(chang)度(du)(du)。部(bu)件長(chang)度(du)(du)值按(an)教材表5.2計取。　　③風(feng)(feng)管(guan)(guan)(guan)(guan)(guan)制作(zuo)與安裝(zhuang)(zhuang)定(ding)額(e)包(bao)括(kuo)：彎(wan)頭(tou)、三通、變(bian)徑管(guan)(guan)(guan)(guan)(guan)、天圓地方(fang)等管(guan)(guan)(guan)(guan)(guan)件及法(fa)蘭、加固(gu)框和吊架、托架、支(zhi)(zhi)架的(de)制作(zuo)與安裝(zhuang)(zhuang)。