不(bu)銹鋼冷(leng)壓無縫三(san)(san)(san)(san)通(tong)(tong)(tong)主(zhu)要制(zhi)造標(biao)準(zhun)一(yi)般(ban)是(shi)(shi)按(an)照管(guan)(guan)(guan)(guan)徑(jing)分(fen)類(lei)：等徑(jing)三(san)(san)(san)(san)通(tong)(tong)(tong)：主(zhu)管(guan)(guan)(guan)(guan)和支(zhi)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)一(yi)樣的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)。異徑(jing)三(san)(san)(san)(san)通(tong)(tong)(tong)：支(zhi)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)小于主(zhu)管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)。按(an)照支(zhi)管(guan)(guan)(guan)(guan)形式分(fen)類(lei)：正三(san)(san)(san)(san)通(tong)(tong)(tong)：就(jiu)是(shi)(shi)支(zhi)管(guan)(guan)(guan)(guan)垂(chui)直主(zhu)管(guan)(guan)(guan)(guan)的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。斜三(san)(san)(san)(san)通(tong)(tong)(tong)：就(jiu)是(shi)(shi)支(zhi)管(guan)(guan)(guan)(guan)與主(zhu)管(guan)(guan)(guan)(guan)有一(yi)定的(de)(de)夾角的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。一(yi)般(ban)低壓的(de)(de)不(bu)銹鋼可以現場在管(guan)(guan)(guan)(guan)道上開口制(zhi)作，但(dan)高壓管(guan)(guan)(guan)(guan)道必須用成品特制(zhi)三(san)(san)(san)(san)通(tong)(tong)(tong)。按(an)照對接(jie)形式分(fen)類(lei)：對焊(han)式三(san)(san)(san)(san)通(tong)(tong)(tong)：就(jiu)是(shi)(shi)和連接(jie)管(guan)(guan)(guan)(guan)件(jian)(jian)對接(jie)后焊(han)接(jie)的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。承(cheng)插(cha)式三(san)(san)(san)(san)通(tong)(tong)(tong)：就(jiu)是(shi)(shi)把連接(jie)管(guan)(guan)(guan)(guan)件(jian)(jian)插(cha)入(ru)(ru)三(san)(san)(san)(san)通(tong)(tong)(tong)各(ge)端(duan)部后焊(han)接(jie)或熔接(jie)的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。卡套式三(san)(san)(san)(san)通(tong)(tong)(tong)：就(jiu)是(shi)(shi)各(ge)端(duan)部是(shi)(shi)卡套接(jie)頭(tou)，把管(guan)(guan)(guan)(guan)件(jian)(jian)插(cha)入(ru)(ru)后再緊(jin)固的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。螺紋(wen)式三(san)(san)(san)(san)通(tong)(tong)(tong)：以螺紋(wen)方(fang)式連接(jie)管(guan)(guan)(guan)(guan)件(jian)(jian)的(de)(de)三(san)(san)(san)(san)通(tong)(tong)(tong)管(guan)(guan)(guan)(guan)件(jian)(jian)。

冷拔三通也比較常見(jian)的(de)管件的(de)一種，一段主管加(jia)上一個小的(de)分支管，由于采用加(jia)熱后壓(ya)制三通，材料成形所需要的(de)設備(bei)噸位(wei)降(jiang)低(di)而(er)得名。用于機械(xie)結構、液壓(ya)設備(bei)的(de)尺寸精度(du)高和(he)表面光潔度(du)好的(de)精密冷拔無縫管。

--在(zai)純氧(yang)管(guan)線中，一(yi)般是有壓(ya)力(li)的(de)(de)(de)(de)，這時氧(yang)的(de)(de)(de)(de)活動力(li)度更強；使用(yong)冷拔三通可避(bi)免，因管(guan)內雜物在(zai)隨氧(yang)氣流移(yi)動，流動速度產(chan)(chan)生(sheng)(sheng)變化時引起雜物與管(guan)子碰撞產(chan)(chan)生(sheng)(sheng)火(huo)源或者因流速變化產(chan)(chan)生(sheng)(sheng)的(de)(de)(de)(de)靜電(dian)放電(dian)，而可能引起純氧(yang)管(guan)的(de)(de)(de)(de)著(zhu)火(huo)。

--冷拔(ba)三(san)通(tong)管(guan)件加(jia)(jia)工方(fang)法是：在(zai)(zai)管(guan)道(dao)要加(jia)(jia)工冷拔(ba)三(san)通(tong)處上(shang)(shang)作標記，并將(jiang)標記處打(da)穿。在(zai)(zai)管(guan)道(dao)上(shang)(shang)安置(zhi)出口裝(zhuang)置(zhi)，其裝(zhuang)置(zhi)包(bao)括(kuo)金屬、頂壓器、換(huan)向器、支架等；將(jiang)金屬棒加(jia)(jia)熱，利用千斤頂及(ji)金屬棒向外頂出時，管(guan)壁(bi)材料(liao)自然(ran)向外翻(fan)出形(xing)成的(de)冷拔(ba)三(san)通(tong)毛坯(pi)；然(ran)后將(jiang)一(yi)定(ding)長(chang)度相應規格的(de)管(guan)段(duan)焊接(jie)在(zai)(zai)頂出形(xing)成的(de)冷拔(ba)三(san)通(tong)毛坯(pi)上(shang)(shang)