用鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)制造環形(xing)(xing)零件(jian)(jian)，可(ke)提高(gao)材(cai)料(liao)(liao)利用率，簡化制造工(gong)序，節約材(cai)料(liao)(liao)和加工(gong)工(gong)時(shi)，如(ru)(ru)(ru)滾動軸承套圈、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)千斤頂套等(deng)(deng)(deng)，目前已廣泛用鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)來制造。鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)還(huan)(huan)是(shi)各種(zhong)常(chang)規武器不可(ke)缺少(shao)的(de)材(cai)料(liao)(liao)，槍管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)本地(di)(di)炮筒等(deng)(deng)(deng)都要鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)來制造。鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)按橫截(jie)面(mian)積(ji)形(xing)(xing)狀(zhuang)的(de)不同可(ke)分為(wei)圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和異(yi)型(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。由于在(zai)周(zhou)長相等(deng)(deng)(deng)的(de)條件(jian)(jian)下，圓(yuan)面(mian)積(ji)，用圓(yuan)形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)可(ke)以輸送更多的(de)流體。此(ci)外，圓(yuan)環截(jie)面(mian)在(zai)承受內部或(huo)外部徑向壓力(li)時(shi)，受力(li)較均(jun)勻，因(yin)此(ci)，絕大多數鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。但是(shi)，圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)也有一定的(de)局限性(xing)，如(ru)(ru)(ru)在(zai)受平面(mian)彎曲(qu)的(de)條件(jian)(jian)下，圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)就不如(ru)(ru)(ru)方(fang)、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)本地(di)(di)矩形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)抗(kang)彎強度(du)大，一些農機具(ju)骨架(jia)、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)本地(di)(di)鋼(gang)木家具(ju)等(deng)(deng)(deng)就常(chang)用方(fang)、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)本地(di)(di)矩形(xing)(xing)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。根據不同用途還(huan)(huan)需有其他截(jie)面(mian)形(xing)(xing)狀(zhuang)的(de)異(yi)型(xing)鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。20G無縫(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)一種(zhong)具(ju)有中(zhong)(zhong)空(kong)(kong)截(jie)面(mian)、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)附近周(zhou)邊沒有接縫(feng)的(de)長條鋼(gang)材(cai)。鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)具(ju)有中(zhong)(zhong)空(kong)(kong)截(jie)面(mian)，大量用作(zuo)輸送流體的(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道，如(ru)(ru)(ru)輸送石(shi)油、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)天(tian)然氣、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)本地(di)(di)煤(mei)氣、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)同城水及某(mou)些固(gu)體物料(liao)(liao)的(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道等(deng)(deng)(deng)。鋼(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)與圓(yuan)鋼(gang)等(deng)(deng)(deng)實心鋼(gang)材(cai)相比，在(zai)抗(kang)彎抗(kang)扭強度(du)相同時(shi)，重量較輕(qing)，是(shi)一種(zhong)經濟(ji)截(jie)面(mian)鋼(gang)材(cai)，廣泛用于制造結構件(jian)(jian)和機械零件(jian)(jian)，如(ru)(ru)(ru)石(shi)油鉆桿、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)同城汽(qi)車傳動軸、山(shan)(shan)(shan)東(dong)濰(wei)坊(fang)(fang)(fang)當地(di)(di)自(zi)行車架(jia)以及建(jian)筑施(shi)工(gong)中(zhong)(zhong)用的(de)鋼(gang)腳手架(jia)等(deng)(deng)(deng)。