無(wu)縫鋼(gang)(gang)管(guan)(guan)由整塊金屬制成的(de)(de)，表面上(shang)沒有(you)接縫的(de)(de)鋼(gang)(gang)管(guan)(guan)，稱為無(wu)縫鋼(gang)(gang)管(guan)(guan)。根據生產(chan)方法，無(wu)縫管(guan)(guan)分熱軋(ya)管(guan)(guan)、冷(leng)軋(ya)管(guan)(guan)、冷(leng)拔管(guan)(guan)、擠壓管(guan)(guan)、頂管(guan)(guan)等(deng)。按照斷面形(xing)(xing)狀，無(wu)縫鋼(gang)(gang)管(guan)(guan)分圓形(xing)(xing)和異(yi)形(xing)(xing)兩種(zhong)(zhong)，異(yi)形(xing)(xing)管(guan)(guan)有(you)方形(xing)(xing)、橢圓形(xing)(xing)、三角(jiao)形(xing)(xing)、六角(jiao)形(xing)(xing)、瓜(gua)子形(xing)(xing)、星形(xing)(xing)、 帶(dai)翅管(guan)(guan)多種(zhong)(zhong)復雜形(xing)(xing)狀。最(zui)大(da)直(zhi)(zhi)徑達650mm，最(zui)小直(zhi)(zhi)徑為 0.3mm。根據用(yong)途不同(tong)， 有(you)厚壁管(guan)(guan)和薄壁管(guan)(guan)。無(wu)縫鋼(gang)(gang)管(guan)(guan)主要用(yong)做(zuo)石油(you)(you)地質鉆探管(guan)(guan)、石油(you)(you)化工(gong)用(yong)的(de)(de)裂化管(guan)(guan)、鍋 爐管(guan)(guan)、軸承(cheng)管(guan)(guan)以及汽車、拖(tuo)拉(la)機、航空用(yong)高精(jing)度結構(gou)鋼(gang)(gang)管(guan)(guan)。