無縫(feng)(feng)方(fang)矩管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是一(yi)(yi)種具有(you)中空(kong)截(jie)面(mian)(mian)(mian)周邊沒有(you)接縫(feng)(feng)的(de)長條(tiao)鋼(gang)(gang)(gang)材(cai)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)具有(you)中空(kong)截(jie)面(mian)(mian)(mian)，大(da)量用作輸送(song)流體(ti)的(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)，如(ru)(ru)輸送(song)石油、天然氣(qi)、煤氣(qi)、水及某些固(gu)體(ti)物料(liao)的(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)等(deng)(deng)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)與圓(yuan)(yuan)鋼(gang)(gang)(gang)等(deng)(deng)實心(xin)鋼(gang)(gang)(gang)材(cai)相(xiang)比，在抗(kang)(kang)彎抗(kang)(kang)扭強度相(xiang)同(tong)時，重量較輕，是一(yi)(yi)種經濟截(jie)面(mian)(mian)(mian)鋼(gang)(gang)(gang)材(cai)，廣泛(fan)用于制(zhi)造(zao)結構(gou)件(jian)和機械(xie)零件(jian)，如(ru)(ru)石油鉆桿、汽(qi)車傳動(dong)軸、自行車架以(yi)及建筑(zhu)施工中用的(de)鋼(gang)(gang)(gang)腳手架等(deng)(deng)。無縫(feng)(feng)方(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。無縫(feng)(feng)矩管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。無縫(feng)(feng)方(fang)矩管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。用鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)制(zhi)造(zao)環(huan)形(xing)(xing)零件(jian)，可(ke)(ke)提高材(cai)料(liao)利用率，簡化制(zhi)造(zao)工序(xu)，節(jie)約材(cai)料(liao)和加工工時，如(ru)(ru)滾(gun)動(dong)軸承(cheng)套圈、千(qian)斤頂套等(deng)(deng)，目前已廣泛(fan)用鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)來(lai)制(zhi)造(zao)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)還是各種常規(gui)武(wu)器不(bu)可(ke)(ke)缺少的(de)材(cai)料(liao)，槍管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、炮筒(tong)等(deng)(deng)都要鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)來(lai)制(zhi)造(zao)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)按橫截(jie)面(mian)(mian)(mian)積形(xing)(xing)狀的(de)不(bu)同(tong)可(ke)(ke)分為圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和異型(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。由于在周長相(xiang)等(deng)(deng)的(de)條(tiao)件(jian)下，圓(yuan)(yuan)面(mian)(mian)(mian)積 ，用圓(yuan)(yuan)形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)可(ke)(ke)以(yi)輸送(song)更多的(de)流體(ti)。此(ci)外，圓(yuan)(yuan)環(huan)截(jie)面(mian)(mian)(mian)在承(cheng)受(shou)內部或(huo)外部徑向壓力(li)時，受(shou)力(li)較均(jun)勻，因此(ci)，絕(jue)大(da)多數鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。但(dan)是，圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)也有(you)一(yi)(yi)定的(de)局限性，如(ru)(ru)在受(shou)平面(mian)(mian)(mian)彎曲的(de)條(tiao)件(jian)下，圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)(jiu)不(bu)如(ru)(ru)方(fang)、矩形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)抗(kang)(kang)彎強度大(da)，一(yi)(yi)些農機具骨架、鋼(gang)(gang)(gang)木家具等(deng)(deng)就(jiu)(jiu)常用方(fang)、矩形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。焊接方(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，焊接矩管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。