無縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)由整塊金屬制成的(de)，表面(mian)上(shang)沒有(you)接縫(feng)(feng)的(de)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，稱為(wei)無縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。根據生產方法，無縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)分熱軋管(guan)(guan)(guan)(guan)(guan)、冷(leng)軋管(guan)(guan)(guan)(guan)(guan)、冷(leng)拔管(guan)(guan)(guan)(guan)(guan)、擠壓管(guan)(guan)(guan)(guan)(guan)、頂管(guan)(guan)(guan)(guan)(guan)等。按照斷面(mian)形(xing)(xing)狀(zhuang)，無縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分圓形(xing)(xing)和異形(xing)(xing)兩種，異形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)有(you)方形(xing)(xing)、橢圓形(xing)(xing)、三角形(xing)(xing)、六(liu)角形(xing)(xing)、瓜子(zi)形(xing)(xing)、星(xing)形(xing)(xing)、 帶(dai)翅管(guan)(guan)(guan)(guan)(guan)多(duo)種復雜(za)形(xing)(xing)狀(zhuang)。最大(da)直徑達(da)650mm，最小直徑為(wei) 0.3mm。根據用(yong)(yong)途不同(tong)， 有(you)厚壁(bi)管(guan)(guan)(guan)(guan)(guan)和薄壁(bi)管(guan)(guan)(guan)(guan)(guan)。無縫(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)主要用(yong)(yong)做石(shi)油地質鉆探管(guan)(guan)(guan)(guan)(guan)、石(shi)油化(hua)工(gong)用(yong)(yong)的(de)裂化(hua)管(guan)(guan)(guan)(guan)(guan)、鍋(guo) 爐(lu)管(guan)(guan)(guan)(guan)(guan)、軸(zhou)承(cheng)管(guan)(guan)(guan)(guan)(guan)以及汽車、拖拉(la)機(ji)、航(hang)空用(yong)(yong)高精度結構鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。