無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)由(you)整(zheng)塊金(jin)屬制成的，表面上(shang)沒有接縫(feng)(feng)(feng)的鋼(gang)(gang)(gang)管(guan)(guan)，稱為無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)。根據(ju)(ju)生(sheng)產方(fang)法，無(wu)(wu)縫(feng)(feng)(feng)管(guan)(guan)分熱軋管(guan)(guan)、冷軋管(guan)(guan)、冷拔管(guan)(guan)、擠壓管(guan)(guan)、頂管(guan)(guan)等。按照斷(duan)面形(xing)狀(zhuang)，無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)分圓(yuan)形(xing)和異形(xing)兩(liang)種(zhong)，異形(xing)管(guan)(guan)有方(fang)形(xing)、橢圓(yuan)形(xing)、三角(jiao)形(xing)、六角(jiao)形(xing)、瓜(gua)子形(xing)、星形(xing)、 帶翅管(guan)(guan)多種(zhong)復雜形(xing)狀(zhuang)。最(zui)(zui)大直(zhi)徑達650mm，最(zui)(zui)小直(zhi)徑為 0.3mm。根據(ju)(ju)用(yong)途不同， 有厚(hou)壁管(guan)(guan)和薄壁管(guan)(guan)。無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)主要用(yong)做(zuo)石(shi)油(you)地質鉆探(tan)管(guan)(guan)、石(shi)油(you)化工用(yong)的裂(lie)化管(guan)(guan)、鍋 爐(lu)管(guan)(guan)、軸承管(guan)(guan)以及(ji)汽車、拖拉機、航空(kong)用(yong)高精(jing)度結構(gou)鋼(gang)(gang)(gang)管(guan)(guan)。