無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)由(you)整塊金屬制(zhi)成的(de)，表(biao)面上(shang)沒(mei)有接縫(feng)(feng)的(de)鋼管(guan)(guan)(guan)(guan)，稱為(wei)無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)。根據(ju)生產方法，無(wu)縫(feng)(feng)管(guan)(guan)(guan)(guan)分(fen)熱軋管(guan)(guan)(guan)(guan)、冷軋管(guan)(guan)(guan)(guan)、冷拔管(guan)(guan)(guan)(guan)、擠壓(ya)管(guan)(guan)(guan)(guan)、頂管(guan)(guan)(guan)(guan)等。按照斷面形(xing)(xing)狀，無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)分(fen)圓形(xing)(xing)和異形(xing)(xing)兩種(zhong)，異形(xing)(xing)管(guan)(guan)(guan)(guan)有方形(xing)(xing)、橢圓形(xing)(xing)、三(san)角形(xing)(xing)、六角形(xing)(xing)、瓜子形(xing)(xing)、星形(xing)(xing)、 帶(dai)翅管(guan)(guan)(guan)(guan)多種(zhong)復雜形(xing)(xing)狀。最大直徑(jing)達650mm，最小直徑(jing)為(wei) 0.3mm。根據(ju)用途不同， 有厚(hou)壁管(guan)(guan)(guan)(guan)和薄壁管(guan)(guan)(guan)(guan)。無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)主要用做石(shi)油地質鉆探管(guan)(guan)(guan)(guan)、石(shi)油化工用的(de)裂化管(guan)(guan)(guan)(guan)、鍋(guo) 爐管(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)以及汽(qi)車、拖拉(la)機、航空用高精度結構(gou)鋼管(guan)(guan)(guan)(guan)。