無縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)由整塊金屬制成的，表(biao)面上沒(mei)有接縫(feng)的鋼(gang)(gang)管(guan)(guan)(guan)(guan)，稱為(wei)無縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)。根據生產方法(fa)，無縫(feng)管(guan)(guan)(guan)(guan)分熱軋管(guan)(guan)(guan)(guan)、冷軋管(guan)(guan)(guan)(guan)、冷拔管(guan)(guan)(guan)(guan)、擠壓管(guan)(guan)(guan)(guan)、頂管(guan)(guan)(guan)(guan)等(deng)。按照斷面形(xing)狀，無縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)分圓形(xing)和(he)異形(xing)兩種，異形(xing)管(guan)(guan)(guan)(guan)有方形(xing)、橢圓形(xing)、三角(jiao)形(xing)、六(liu)角(jiao)形(xing)、瓜子形(xing)、星形(xing)、 帶翅管(guan)(guan)(guan)(guan)多種復雜形(xing)狀。最大直(zhi)徑(jing)達650mm，最小直(zhi)徑(jing)為(wei) 0.3mm。根據用(yong)途不同， 有厚壁管(guan)(guan)(guan)(guan)和(he)薄壁管(guan)(guan)(guan)(guan)。無縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)(guan)主要用(yong)做石油(you)地質(zhi)鉆探(tan)管(guan)(guan)(guan)(guan)、石油(you)化(hua)工用(yong)的裂化(hua)管(guan)(guan)(guan)(guan)、鍋 爐管(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)以(yi)及汽車、拖(tuo)拉機、航空用(yong)高精(jing)度(du)結(jie)構鋼(gang)(gang)管(guan)(guan)(guan)(guan)。