盲堵板有的(de)(de)也叫做盲法蘭(lan)或(huo)者管(guan)堵。它是(shi)中間不帶孔的(de)(de)法蘭(lan)，用于封(feng)堵管(guan)道口。所(suo)起到(dao)的(de)(de)功(gong)能和(he)封(feng)頭及管(guan)帽是(shi)一(yi)樣的(de)(de)，只(zhi)不過盲堵板密(mi)封(feng)是(shi)一(yi)種(zhong)可拆卸的(de)(de)密(mi)封(feng)裝置，而封(feng)頭的(de)(de)密(mi)封(feng)是(shi)不準備再打開(kai)的(de)(de)。密(mi)封(feng)面的(de)(de)形(xing)式種(zhong)類(lei)較多，有平面、凸(tu)面、凹凸(tu)面、榫槽面和(he)環連接面。

盲堵板的作用及分類

盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)從外(wai)觀上看，一般(ban)分為板(ban)(ban)(ban)(ban)(ban)式平板(ban)(ban)(ban)(ban)(ban)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)、8字(zi)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)、插板(ban)(ban)(ban)(ban)(ban)、以及(ji)墊環（插板(ban)(ban)(ban)(ban)(ban)和墊環互為盲(mang)(mang)(mang)(mang)通(tong)(tong)）。盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)起(qi)隔(ge)離(li)(li)、切斷作用(yong)，和封(feng)頭、管(guan)(guan)(guan)帽、焊接(jie)堵頭所起(qi)的(de)作用(yong)是一樣的(de)。由于(yu)其密封(feng)性能好，對于(yu)需要隔(ge)離(li)(li)的(de)系統，一般(ban)都作為的(de)隔(ge)離(li)(li)手段。板(ban)(ban)(ban)(ban)(ban)式平板(ban)(ban)(ban)(ban)(ban)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)就是一個帶柄的(de)實(shi)心的(de)圓，用(yong)于(yu)通(tong)(tong)常狀況下(xia)處于(yu)隔(ge)離(li)(li)狀態(tai)的(de)系統。而8字(zi)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)，形(xing)狀像8字(zi)，一端是盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)，另(ling)一端是節(jie)流環，但直徑與管(guan)(guan)(guan)道的(de)管(guan)(guan)(guan)徑相同(tong)(tong)，并不起(qi)節(jie)流作用(yong)。8字(zi)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)，使用(yong)方便，需要隔(ge)離(li)(li)時(shi)，使用(yong)盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)端，需要正常操作時(shi)，使用(yong)節(jie)流環端，同(tong)(tong)時(shi)也可用(yong)于(yu)填補管(guan)(guan)(guan)路上盲(mang)(mang)(mang)(mang)堵板(ban)(ban)(ban)(ban)(ban)的(de)安裝(zhuang)間隙。另(ling)一個特點就是標(biao)識明顯，易于(yu)辨認安裝(zhuang)狀態(tai)。