無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)由整塊金屬制成的(de)(de)，表面(mian)上(shang)沒有接縫(feng)(feng)的(de)(de)鋼(gang)(gang)管(guan)(guan)，稱為無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)。根據生產方(fang)法，無(wu)縫(feng)(feng)管(guan)(guan)分(fen)(fen)熱(re)軋(ya)管(guan)(guan)、冷軋(ya)管(guan)(guan)、冷拔管(guan)(guan)、擠(ji)壓管(guan)(guan)、頂管(guan)(guan)等。按照(zhao)斷面(mian)形(xing)(xing)狀(zhuang)，無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)分(fen)(fen)圓(yuan)形(xing)(xing)和異(yi)形(xing)(xing)兩(liang)種，異(yi)形(xing)(xing)管(guan)(guan)有方(fang)形(xing)(xing)、橢圓(yuan)形(xing)(xing)、三角(jiao)形(xing)(xing)、六角(jiao)形(xing)(xing)、瓜子形(xing)(xing)、星(xing)形(xing)(xing)、 帶翅管(guan)(guan)多種復雜形(xing)(xing)狀(zhuang)。最大直(zhi)徑達650mm，最小直(zhi)徑為 0.3mm。根據用(yong)(yong)途不(bu)同， 有厚壁管(guan)(guan)和薄壁管(guan)(guan)。無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)(guan)主要(yao)用(yong)(yong)做(zuo)石(shi)油地質(zhi)鉆探(tan)管(guan)(guan)、石(shi)油化(hua)工用(yong)(yong)的(de)(de)裂化(hua)管(guan)(guan)、鍋 爐管(guan)(guan)、軸承管(guan)(guan)以及汽(qi)車、拖(tuo)拉機、航空用(yong)(yong)高(gao)精度(du)結構鋼(gang)(gang)管(guan)(guan)。