國標三通(tong)用(yong)在(zai)管(guan)道(dao)有分支的(de)地方(fang),因其使用(yong)方(fang)便簡單(dan),在(zai)化工(gong)、民(min)用(yong)建筑、機械制造、船舶工(gong)業等應用(yong)廣泛。對于采用(yong)無縫管(guan)制造國標三通(tong)來講,目前(qian)通(tong)常所采用(yong)的(de)工(gong)藝有液壓(ya)脹(zhang)形(xing)和熱壓(ya)成形(xing)兩(liang)種。
國(guo)標三通(tong)的設備:在管(guan)道上安置(zhi)頂(ding)出(chu)(chu)裝(zhuang)(zhuang)置(zhi),其裝(zhuang)(zhuang)置(zhi)包括(kuo)金屬(shu)棒(bang)、頂(ding)壓(ya)器、換(huan)向器、支架等;將金屬(shu)棒(bang)加熱,利用(yong)千(qian)斤頂(ding)及金屬(shu)棒(bang)向外(wai)頂(ding)出(chu)(chu)時,管(guan)壁材(cai)料自然向外(wai)翻出(chu)(chu)形(xing)成的冷拔三通(tong)毛(mao)(mao)坯;然后將 長度相應規格(ge)的管(guan)段焊(han)接在頂(ding)出(chu)(chu)形(xing)成的國(guo)標三通(tong)毛(mao)(mao)坯上,生產(chan)出(chu)(chu)終產(chan)品。
國(guo)(guo)標(biao)三通(tong)三個出口的口徑全一樣(yang)的,是等徑國(guo)(guo)標(biao)三通(tong),而兩頭一樣(yang)大,中間(jian)小的國(guo)(guo)標(biao)三通(tong),叫做異(yi)徑國(guo)(guo)標(biao)三通(tong)。執行(xing)GB/T12459-2005。材質(zhi)有(you)碳鋼(gang),合(he)金鋼(gang)及(ji)不銹鋼(gang)等。