無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)由整塊金(jin)屬制成的，表(biao)面(mian)上沒有接縫(feng)的鋼(gang)管(guan)(guan)(guan)(guan)(guan)，稱為(wei)無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)。根(gen)據生(sheng)產(chan)方法(fa)，無(wu)(wu)(wu)(wu)縫(feng)管(guan)(guan)(guan)(guan)(guan)分熱軋管(guan)(guan)(guan)(guan)(guan)、冷軋管(guan)(guan)(guan)(guan)(guan)、冷拔管(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，無(wu)(wu)(wu)(wu)縫(feng)鋼(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)有方形(xing)(xing)、橢圓形(xing)(xing)、三角形(xing)(xing)、六角形(xing)(xing)、瓜子形(xing)(xing)、星形(xing)(xing)、 帶翅管(guan)(guan)(guan)(guan)(guan)多種復雜形(xing)(xing)狀。最大直(zhi)徑(jing)達650mm，最小直(zhi)徑(jing)為(wei) 0.3mm。根(gen)據用(yong)途不(bu)同， 有厚壁管(guan)(guan)(guan)(guan)(guan)和薄壁管(guan)(guan)(guan)(guan)(guan)。無(wu)(wu)(wu)(wu)縫(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)主要用(yong)做(zuo)石油地質鉆(zhan)探管(guan)(guan)(guan)(guan)(guan)、石油化工(gong)用(yong)的裂(lie)化管(guan)(guan)(guan)(guan)(guan)、鍋 爐管(guan)(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)(guan)以及汽車、拖拉機(ji)、航空用(yong)高精度結構鋼(gang)管(guan)(guan)(guan)(guan)(guan)。