碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)也(ye)是管件之(zhi)一(yi)，有兩種。異徑(jing)碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)，兩端具有相同的直徑(jing)，支(zhi)管和其他兩個不同的直徑(jing)稱(cheng)為(wei)還原碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)。碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)管、管連接(jie)件。也(ye)稱(cheng)為(wei)管-管碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)或碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)管、不銹鋼(gang)等徑(jing)碳(tan)鋼(gang)三通(tong)(tong)(tong)(tong)、碳(tan)鋼(gang)T型(xing)(xing)三通(tong)(tong)(tong)(tong)接(jie)頭，用于(yu)主管支(zhi)管。

碳鋼T型三(san)通(tong)有三(san)個(ge)嘴，即一(yi)(yi)個(ge)   、兩(liang)個(ge)出(chu)口；或者兩(liang)個(ge)   、一(yi)(yi)個(ge)出(chu)口的(de)一(yi)(yi)種化(hua)管(guan)(guan)部件，有T形(xing)和Y形(xing)，有等徑(jing)管(guan)(guan)口，另外(wai)，也(ye)有不同直徑(jing)的(de)管(guan)(guan)口，用(yong)于3條(tiao)相同或不同的(de)管(guan)(guan)路(lu)的(de)匯集所。碳鋼T型三(san)通(tong)的(de)主要作用(yong)是改變(bian)流體的(de)方向。

表示方法(fa)如下：對于等(deng)徑碳鋼T型三通(tong)(tong)(tong)，比(bi)如"T3"（3英寸(cun)(cun)=DN80）碳鋼T型三通(tong)(tong)(tong)則(ze)表示外(wai)徑是3英寸(cun)(cun)的等(deng)徑碳鋼T型三通(tong)(tong)(tong)。對于異(yi)徑碳鋼T型三通(tong)(tong)(tong)，比(bi)如"T4×4×3.5"（4英寸(cun)(cun)=DN100,3.5英寸(cun)(cun)=DN90）表示同徑為(wei)(wei)四(si)英寸(cun)(cun)異(yi)徑為(wei)(wei)3.5英寸(cun)(cun)的異(yi)徑碳鋼T型三通(tong)(tong)(tong)。材質一(yi)般為(wei)(wei)10# 20# A3 Q23 20g 20G 16Mn ASTM A234 ASTM A105 ASTM A403等(deng)，碳鋼T型三通(tong)(tong)(tong)，外(wai)徑范圍(wei)在2.5″－60″（2.5英寸(cun)(cun)=DN65,60英寸(cun)(cun)=DN1500），壁(bi)厚(hou)3-60mm，從26″－60″（26英寸(cun)(cun)=DN650，60英寸(cun)(cun)=DN1500）為(wei)(wei)焊接(jie)碳鋼T型三通(tong)(tong)(tong)。壁(bi)厚(hou)28－60mm。壓(ya)力等(deng)級(ji)為(wei)(wei)Sch5s、Sch10s、Sch10、Sch20、Sch30、Sch40s、STD、Sch40、Sch60、Sch80s、XS；Sch80、Sch100、Sch120、Sch140、Sch160、XXS。