盲堵(du)板(ban)有(you)的(de)也(ye)叫(jiao)做盲法蘭(lan)或者管堵(du)。它(ta)是(shi)中間不(bu)帶孔的(de)法蘭(lan)，用于封堵(du)管道口。所起到的(de)功能和封頭(tou)及管帽是(shi)一樣(yang)的(de)，只不(bu)過(guo)盲堵(du)板(ban)密(mi)(mi)封是(shi)一種可拆卸的(de)密(mi)(mi)封裝(zhuang)置，而封頭(tou)的(de)密(mi)(mi)封是(shi)不(bu)準(zhun)備再打(da)開的(de)。密(mi)(mi)封面(mian)(mian)的(de)形(xing)式種類(lei)較多，有(you)平面(mian)(mian)、凸(tu)面(mian)(mian)、凹(ao)凸(tu)面(mian)(mian)、榫(sun)槽(cao)面(mian)(mian)和環連接面(mian)(mian)。

盲堵板的作用及分類

盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)從外觀上看，一般分(fen)為(wei)(wei)板(ban)(ban)(ban)(ban)式平板(ban)(ban)(ban)(ban)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)、8字(zi)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)、插(cha)板(ban)(ban)(ban)(ban)、以(yi)及(ji)墊環(huan)（插(cha)板(ban)(ban)(ban)(ban)和墊環(huan)互為(wei)(wei)盲(mang)(mang)(mang)(mang)通(tong)(tong)）。盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)起隔(ge)離(li)、切斷(duan)作(zuo)用(yong)，和封頭、管(guan)(guan)帽(mao)、焊接(jie)堵(du)頭所起的(de)(de)(de)作(zuo)用(yong)是(shi)一樣的(de)(de)(de)。由(you)于其密封性能好，對于需(xu)要(yao)隔(ge)離(li)的(de)(de)(de)系統，一般都作(zuo)為(wei)(wei)的(de)(de)(de)隔(ge)離(li)手段。板(ban)(ban)(ban)(ban)式平板(ban)(ban)(ban)(ban)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)就是(shi)一個帶柄的(de)(de)(de)實心(xin)的(de)(de)(de)圓，用(yong)于通(tong)(tong)常狀(zhuang)況(kuang)下處于隔(ge)離(li)狀(zhuang)態(tai)的(de)(de)(de)系統。而8字(zi)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)，形狀(zhuang)像8字(zi)，一端是(shi)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)，另(ling)一端是(shi)節流(liu)(liu)環(huan)，但直徑與管(guan)(guan)道的(de)(de)(de)管(guan)(guan)徑相同，并不起節流(liu)(liu)作(zuo)用(yong)。8字(zi)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)，使(shi)(shi)用(yong)方便，需(xu)要(yao)隔(ge)離(li)時，使(shi)(shi)用(yong)盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)端，需(xu)要(yao)正常操作(zuo)時，使(shi)(shi)用(yong)節流(liu)(liu)環(huan)端，同時也可用(yong)于填補管(guan)(guan)路(lu)上盲(mang)(mang)(mang)(mang)堵(du)板(ban)(ban)(ban)(ban)的(de)(de)(de)安裝間隙。另(ling)一個特點(dian)就是(shi)標識(shi)明顯，易于辨認安裝狀(zhuang)態(tai)。