鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)具(ju)有空心(xin)截面，其長度遠大于直徑或周長的鋼(gang)(gang)(gang)(gang)材。按(an)(an)截面形(xing)狀分為(wei)圓形(xing)、方形(xing)、矩形(xing)和(he)(he)異(yi)形(xing)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan);按(an)(an)原(yuan)料(liao)分為(wei)碳素結構鋼(gang)(gang)(gang)(gang)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、低合金結構鋼(gang)(gang)(gang)(gang)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金鋼(gang)(gang)(gang)(gang)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)復合鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan);按(an)(an)用途分為(wei)運送管(guan)(guan)(guan)(guan)(guan)(guan)道用、工(gong)(gong)(gong)程結構用、熱工(gong)(gong)(gong)設備用、石油化(hua)工(gong)(gong)(gong)工(gong)(gong)(gong)業用、機械(xie)制作(zuo)用、地質(zhi)鉆探用、高壓設備用鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)等;按(an)(an)出產工(gong)(gong)(gong)藝分為(wei)無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)焊(han)(han)接鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)，其中無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)又分熱軋和(he)(he)冷軋(拔)兩種(zhong)，焊(han)(han)接鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)又分直縫焊(han)(han)接鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)螺旋縫焊(han)(han)接鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。

鋼管不(bu)只用(yong)(yong)于運送(song)流體和粉狀固體、交(jiao)換熱能、制(zhi)作(zuo)機械零件(jian)和容(rong)器，它仍是一種經濟鋼材。用(yong)(yong)鋼管制(zhi)作(zuo)建筑結構網架(jia)、支柱和機械支架(jia)，可以減 輕重量，節省金屬20～40，并且(qie)可實現工廠化(hua)(hua)機械化(hua)(hua)施(shi)工。用(yong)(yong)鋼管制(zhi)作(zuo)公(gong)路橋(qiao)梁不(bu)但可節省鋼材、簡(jian)化(hua)(hua)施(shi)工，并且(qie)可大大削(xue)減涂保護層的面積，節約投資和維護費用(yong)(yong)。

分類

按出(chu)產辦法(fa)

鋼管(guan)按出產辦法(fa)可(ke)分(fen)為(wei)兩(liang)大類(lei)：無縫鋼管(guan)和焊(han)接鋼管(guan),焊(han)接鋼管(guan)簡稱為(wei)焊(han)管(guan)。

1. 無(wu)縫(feng)鋼管(guan)按出產辦法可分為：熱軋無(wu)縫(feng)管(guan)、冷拔管(guan)、精細鋼管(guan)、熱擴(kuo)管(guan)、冷旋壓管(guan)和(he)擠壓管(guan)等。

無縫鋼(gang)管用碳素鋼(gang)或合金鋼(gang)制成，有熱(re)軋、冷(leng)軋（拔）之分。

2.焊(han)(han)接鋼管(guan)因其焊(han)(han)接工藝不同(tong)而分為爐焊(han)(han)管(guan)、電(dian)(dian)焊(han)(han)（電(dian)(dian)阻焊(han)(han)）管(guan)和(he)自(zi)動電(dian)(dian)弧焊(han)(han)管(guan)，因其焊(han)(han)接形式的不同(tong)分為直縫(feng)焊(han)(han)管(guan)和(he)螺(luo)旋焊(han)(han)管(guan)兩種，因其端部形狀又分為圓形焊(han)(han)管(guan)和(he)異型（方、扁等）焊(han)(han)管(guan)。

焊(han)(han)(han)接鋼管(guan)(guan)(guan)(guan)是由卷成(cheng)管(guan)(guan)(guan)(guan)形的(de)鋼板以對(dui)縫(feng)(feng)或螺旋(xuan)縫(feng)(feng)焊(han)(han)(han)接而成(cheng)，在制作辦(ban)法上(shang)，又分為(wei)低壓流體運(yun)送用(yong)焊(han)(han)(han)接鋼管(guan)(guan)(guan)(guan)、螺旋(xuan)縫(feng)(feng)電(dian)焊(han)(han)(han)鋼管(guan)(guan)(guan)(guan)、直接卷焊(han)(han)(han)鋼管(guan)(guan)(guan)(guan)、電(dian)焊(han)(han)(han)管(guan)(guan)(guan)(guan)等(deng)。無縫(feng)(feng)鋼管(guan)(guan)(guan)(guan)可用(yong)于各種行(xing)業的(de)液體氣(qi)(qi)壓管(guan)(guan)(guan)(guan)道(dao)(dao)和氣(qi)(qi)體管(guan)(guan)(guan)(guan)道(dao)(dao)等(deng)。焊(han)(han)(han)接管(guan)(guan)(guan)(guan)道(dao)(dao)可用(yong)于輸水管(guan)(guan)(guan)(guan)道(dao)(dao)、煤氣(qi)(qi)管(guan)(guan)(guan)(guan)道(dao)(dao)、暖氣(qi)(qi)管(guan)(guan)(guan)(guan)道(dao)(dao)、電(dian)器管(guan)(guan)(guan)(guan)道(dao)(dao)等(deng)。

按原料

鋼管(guan)(guan)按(an)制管(guan)(guan)原料（即鋼種）可分(fen)為：碳素管(guan)(guan)和合金管(guan)(guan)、不銹鋼管(guan)(guan)等。

碳(tan)素(su)管又可分(fen)為一般碳(tan)素(su)鋼管和碳(tan)素(su)結構管。

合金管又可分為：低合金管、合金結構管、高合金管、高強度管。軸承管、耐熱耐酸不銹管、精細合金（如可伐合金）管以及高溫合金管等。沈陽不銹鋼管

按(an)連(lian)接方式分類(lei)

鋼管(guan)按管(guan)端聯接方(fang)式可分(fen)為：光管(guan)（管(guan)端不帶螺紋）和(he)車絲管(guan)（管(guan)端帶有螺紋）。

車絲管又分(fen)為：一般車絲管和管端加厚車絲管。

加厚車絲(si)管(guan)還可分為：外加厚（帶(dai)外螺(luo)紋）、內(nei)加厚（帶(dai)內(nei)螺(luo)紋）和(he)表里(li)加厚（帶(dai)表里(li)螺(luo)紋）等地(di)車絲(si)管(guan)。

車(che)絲管(guan)(guan)若按螺(luo)紋型(xing)式(shi)也(ye)可(ke)分為：一般圓柱(zhu)或圓錐螺(luo)紋和特殊螺(luo)紋等(deng)地車(che)絲管(guan)(guan)。

別的，依據用戶(hu)需(xu)要，車絲管一般均(jun)配有(you)管接頭交(jiao)貨。

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