大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)就是(shi)(shi)(shi)把(ba)兩(liang)個(ge)管道(dao)、管件(jian)或器(qi)材，先各自固(gu)定在(zai)一個(ge)大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭盤(pan)上，兩(liang)個(ge)大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭盤(pan)之間，加上大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭墊，用(yong)螺栓(shuan)緊固(gu)在(zai)一起，完(wan)成了連(lian)(lian)接(jie)(jie)。有的(de)(de)管件(jian)和器(qi)材已經(jing)自帶(dai)大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭盤(pan)，也是(shi)(shi)(shi)屬于大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)。大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)是(shi)(shi)(shi)管道(dao)施工的(de)(de)重要(yao)連(lian)(lian)接(jie)(jie)方式。大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)使用(yong)方便，能(neng)夠承受(shou)較大(da)(da)(da)的(de)(de)壓力。在(zai)工業管道(dao)中，大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)的(de)(de)使用(yong)廣(guang)泛。在(zai)家庭內，管道(dao)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)小，而且是(shi)(shi)(shi)低壓，看不見大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)。如(ru)果在(zai)一個(ge)鍋爐房(fang)或者生(sheng)產現場，到處都是(shi)(shi)(shi)大(da)(da)(da)直(zhi)(zhi)(zhi)(zhi)(zhi)徑(jing)(jing)(jing)平(ping)板(ban)(ban)法(fa)蘭連(lian)(lian)接(jie)(jie)的(de)(de)管道(dao)和器(qi)材。

按照連接方式不同，有(you)對焊(han)大(da)直(zhi)(zhi)徑(jing)(jing)平(ping)板(ban)法蘭，承插焊(han)大(da)直(zhi)(zhi)徑(jing)(jing)平(ping)板(ban)法蘭，螺紋大(da)直(zhi)(zhi)徑(jing)(jing)平(ping)板(ban)法蘭，松套大(da)直(zhi)(zhi)徑(jing)(jing)平(ping)板(ban)法蘭，滑套大(da)直(zhi)(zhi)徑(jing)(jing)平(ping)板(ban)法蘭。

大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)相(xiang)對于帶頸(jing)大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)而言(yan)，大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)根據材質可(ke)以分為碳(tan)鋼(gang)大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)，不銹(xiu)鋼(gang)大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)和合金(jin)鋼(gang)大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)。大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)的結構形式(shi)有整體大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)和單(dan)元(yuan)大(da)直(zhi)徑(jing)(jing)(jing)平(ping)(ping)板(ban)(ban)法蘭(lan)。

大直徑平(ping)板法蘭(lan)標準體系

公稱壓力：0.25Mpa~42.0Mpa

a、系(xi)列(lie)1：PN1.0,PN1.6,PN2.0,PN5.0,PN10.0,PN15.0,PN25.0,PN42（主系(xi)列(lie)）

b、系列2：PN0.25,PN0.6,PN2.5,PN4.0

其中(zhong)PN0.25，PN0.6，PN1.0，PN1.6，PN2.5，PN4.0共(gong)6個等級的(de)大(da)(da)直(zhi)徑(jing)平(ping)板法(fa)蘭尺(chi)寸(cun)系(xi)(xi)屬于(yu)以(yi)德(de)國(guo)大(da)(da)直(zhi)徑(jing)平(ping)板法(fa)蘭為代表(biao)的(de)歐洲大(da)(da)直(zhi)徑(jing)平(ping)板法(fa)蘭體系(xi)(xi)，其余為美國(guo)大(da)(da)直(zhi)徑(jing)平(ping)板法(fa)蘭為代表(biao)的(de)美洲大(da)(da)直(zhi)徑(jing)平(ping)板法(fa)蘭體系(xi)(xi)。