45號超厚壁(bi)無縫(feng)鋼(gang)管325*120厚壁(bi)無縫(feng)鋼(gang)管20號厚壁(bi)無縫(feng)鋼(gang)管

無(wu)縫(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)由整塊金屬制成的(de)(de)，表面上沒有(you)接(jie)縫(feng)(feng)的(de)(de)鋼(gang)管(guan)(guan)(guan)(guan)，稱為無(wu)縫(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)。根(gen)據(ju)方(fang)法，無(wu)縫(feng)(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)(xing)(xing)(xing)狀，無(wu)縫(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)分圓形(xing)(xing)(xing)(xing)和異形(xing)(xing)(xing)(xing)兩種，異形(xing)(xing)(xing)(xing)管(guan)(guan)(guan)(guan)有(you)方(fang)形(xing)(xing)(xing)(xing)、橢(tuo)圓形(xing)(xing)(xing)(xing)、三(san)角形(xing)(xing)(xing)(xing)、六角形(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)、 帶(dai)翅(chi)管(guan)(guan)(guan)(guan)多種復雜形(xing)(xing)(xing)(xing)狀。直(zhi)徑(jing)達650mm，最(zui)小直(zhi)徑(jing)為 0.3mm。根(gen)據(ju)用途不同(tong)， 有(you)厚壁管(guan)(guan)(guan)(guan)和薄壁管(guan)(guan)(guan)(guan)。無(wu)縫(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)主要用做石油地質鉆探(tan)管(guan)(guan)(guan)(guan)、石油化工用的(de)(de)裂化管(guan)(guan)(guan)(guan)、鍋 爐(lu)管(guan)(guan)(guan)(guan)、軸承管(guan)(guan)(guan)(guan)以及汽車、拖拉機、航(hang)空用高精(jing)度(du)結構鋼(gang)管(guan)(guan)(guan)(guan)。

分類：

沿其橫截面的周邊(bian)上(shang)無(wu)接(jie)縫(feng)的鋼管(guan)。根據(ju)方法不同分為熱軋管(guan)、冷軋管(guan)、冷拔(ba)管(guan)、擠壓管(guan)、頂管(guan)等，均有各自工藝規(gui)定。

材質(zhi)有(you)普通(tong)和優質(zhi)碳(tan)素結構(gou)鋼(gang)(gang)（Q215-A～Q275-A和10～50號鋼(gang)(gang)）、低合(he)金(jin)鋼(gang)(gang)（09MnV、16Mn等(deng)）、合(he)金(jin)鋼(gang)(gang)、不(bu)銹耐酸(suan)鋼(gang)(gang)等(deng)。

按用(yong)途分為一(yi)般用(yong)途的（用(yong)于輸水、氣管道和結構件、機械零件）和專用(yong)的（用(yong)于鍋爐、地(di)質勘探、軸承、耐酸(suan)等）兩類。