碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)也是(shi)管(guan)件之一，有兩種(zhong)。異(yi)徑(jing)碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)，兩端具有相同的(de)直徑(jing)，支(zhi)管(guan)和(he)其他兩個不同的(de)直徑(jing)稱(cheng)為還原(yuan)碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)。碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)管(guan)、管(guan)連(lian)接(jie)件。也稱(cheng)為管(guan)-管(guan)碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)或碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)管(guan)、不銹鋼等(deng)徑(jing)碳(tan)(tan)(tan)鋼三通(tong)(tong)、碳(tan)(tan)(tan)鋼T型(xing)(xing)(xing)三通(tong)(tong)接(jie)頭，用于主管(guan)支(zhi)管(guan)。

碳鋼(gang)T型(xing)三通有三個(ge)嘴，即(ji)一個(ge)   、兩個(ge)出(chu)口(kou)；或(huo)者兩個(ge)   、一個(ge)出(chu)口(kou)的(de)一種化管(guan)(guan)部(bu)件，有T形和Y形，有等徑(jing)管(guan)(guan)口(kou)，另外(wai)，也有不同直徑(jing)的(de)管(guan)(guan)口(kou)，用(yong)于3條相同或(huo)不同的(de)管(guan)(guan)路的(de)匯集所。碳鋼(gang)T型(xing)三通的(de)主(zhu)要作用(yong)是改變(bian)流體(ti)的(de)方向。

表(biao)示方法如(ru)下：對于等(deng)(deng)徑(jing)(jing)碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)，比如(ru)"T3"（3英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN80）碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)則表(biao)示外徑(jing)(jing)是3英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)的(de)等(deng)(deng)徑(jing)(jing)碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)。對于異(yi)徑(jing)(jing)碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)，比如(ru)"T4×4×3.5"（4英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN100,3.5英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN90）表(biao)示同徑(jing)(jing)為四英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)異(yi)徑(jing)(jing)為3.5英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)的(de)異(yi)徑(jing)(jing)碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)。材質一般為10# 20# A3 Q23 20g 20G 16Mn ASTM A234 ASTM A105 ASTM A403等(deng)(deng)，碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)，外徑(jing)(jing)范(fan)圍在(zai)2.5″－60″（2.5英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN65,60英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN1500），壁(bi)厚3-60mm，從26″－60″（26英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN650，60英(ying)(ying)(ying)(ying)(ying)寸(cun)(cun)(cun)(cun)=DN1500）為焊接(jie)碳(tan)(tan)鋼(gang)T型(xing)三(san)(san)通(tong)。壁(bi)厚28－60mm。壓力(li)等(deng)(deng)級(ji)為Sch5s、Sch10s、Sch10、Sch20、Sch30、Sch40s、STD、Sch40、Sch60、Sch80s、XS；Sch80、Sch100、Sch120、Sch140、Sch160、XXS。