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沿其(qi)橫截面的(de)(de)周邊上無(wu)接(jie)縫(feng)(feng)的(de)(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。根據生產(chan)方(fang)法不(bu)同分(fen)為熱軋管(guan)(guan)(guan)(guan)(guan)、冷(leng)軋管(guan)(guan)(guan)(guan)(guan)、冷(leng)拔管(guan)(guan)(guan)(guan)(guan)、擠壓(ya)(ya)管(guan)(guan)(guan)(guan)(guan)、頂(ding)管(guan)(guan)(guan)(guan)(guan)等，均(jun)有(you)(you)(you)各自工(gong)藝(yi)規定。材質(zhi)(zhi)(zhi)有(you)(you)(you)普通和(he)(he)(he)優質(zhi)(zhi)(zhi)碳(tan)素結構(gou)鋼(gang)(gang)（Q215-A～Q275-A和(he)(he)(he)10～50號鋼(gang)(gang)）、低(di)合(he)金鋼(gang)(gang)（09MnV、16Mn等）、合(he)金鋼(gang)(gang)、不(bu)銹(xiu)耐酸鋼(gang)(gang)等。按(an)用(yong)(yong)(yong)途(tu)分(fen)為一般用(yong)(yong)(yong)途(tu)的(de)(de)（用(yong)(yong)(yong)于(yu)輸(shu)水(shui)、氣管(guan)(guan)(guan)(guan)(guan)道和(he)(he)(he)結構(gou)件(jian)、機(ji)械零(ling)件(jian)）和(he)(he)(he)專用(yong)(yong)(yong)的(de)(de)（用(yong)(yong)(yong)于(yu)鍋爐、地(di)質(zhi)(zhi)(zhi)勘探、軸承、耐酸等）兩類(lei)(lei)。無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)用(yong)(yong)(yong)途(tu)無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan) 無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)用(yong)(yong)(yong)途(tu)很廣泛。一般用(yong)(yong)(yong)途(tu)的(de)(de)無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)由普通的(de)(de)碳(tan)素結構(gou)鋼(gang)(gang)、低(di)合(he)金結構(gou)鋼(gang)(gang)或合(he)金結構(gou)鋼(gang)(gang)軋制(zhi)，產(chan)量(liang)多(duo)，主要(yao)用(yong)(yong)(yong)作(zuo)輸(shu)送流體的(de)(de)管(guan)(guan)(guan)(guan)(guan)道或結構(gou)零(ling)件(jian)。2、根據用(yong)(yong)(yong)途(tu)不(bu)同分(fen)三(san)類(lei)(lei)供(gong)(gong)(gong)應：a、按(an)化(hua)學成分(fen)和(he)(he)(he)機(ji)械性能(neng)供(gong)(gong)(gong)應；b、按(an)機(ji)械性能(neng)供(gong)(gong)(gong)應；c、按(an)水(shui)壓(ya)(ya)試驗(yan)供(gong)(gong)(gong)應。按(an)a、b類(lei)(lei)供(gong)(gong)(gong)應的(de)(de)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，如用(yong)(yong)(yong)于(yu)承受(shou)液體壓(ya)(ya)力(li)，也要(yao)進行水(shui)壓(ya)(ya)試驗(yan)。3、專門用(yong)(yong)(yong)途(tu)的(de)(de)無(wu)縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)有(you)(you)(you)鍋爐用(yong)(yong)(yong)無(wu)縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)、化(hua)工(gong)電力(li)用(yong)(yong)(yong)，地(di)質(zhi)(zhi)(zhi)用(yong)(yong)(yong)無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)(guan)及石(shi)油用(yong)(yong)(yong)無(wu)縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)等多(duo)種。