鋼(gang)(gang)(gang)(gang)管(guan)還是(shi)各種常規的(de)(de)(de)材料，都是(shi)用鋼(gang)(gang)(gang)(gang)管(guan)制成的(de)(de)(de)。根據截面積的(de)(de)(de)不(bu)(bu)同，鋼(gang)(gang)(gang)(gang)管(guan)可分為(wei)圓(yuan)(yuan)管(guan)和異型管(guan)。由于在(zai)相等的(de)(de)(de)周長(chang)條(tiao)件下(xia)(xia)圓(yuan)(yuan)形(xing)(xing)(xing)面積，因(yin)此圓(yuan)(yuan)形(xing)(xing)(xing)管(guan)可以輸送(song)更多的(de)(de)(de)流(liu)體(ti)。另外(wai)，當(dang)環形(xing)(xing)(xing)部(bu)分承受(shou)內部(bu)或外(wai)部(bu)徑向(xiang)壓力時，力相對(dui)均勻。因(yin)此，大(da)多數鋼(gang)(gang)(gang)(gang)管(guan)是(shi)圓(yuan)(yuan)管(guan)。圓(yuan)(yuan)管(guan)也(ye)有一(yi)定的(de)(de)(de)局限性。例如(ru)，在(zai)平面彎(wan)曲條(tiao)件下(xia)(xia)，圓(yuan)(yuan)形(xing)(xing)(xing)管(guan)的(de)(de)(de)強度(du)不(bu)(bu)如(ru)方形(xing)(xing)(xing)和矩形(xing)(xing)(xing)管(guan)。一(yi)些(xie)農業機械框架，鋼(gang)(gang)(gang)(gang)制和木制家具(ju)(ju)等通(tong)常使用方形(xing)(xing)(xing)和矩形(xing)(xing)(xing)管(guan)道。根據不(bu)(bu)同的(de)(de)(de)目的(de)(de)(de)，需要具(ju)(ju)有其他橫截面形(xing)(xing)(xing)狀的(de)(de)(de)異型鋼(gang)(gang)(gang)(gang)管(guan)。

壁厚(hou)的均勻(yun)(yun)性(xing)(xing)、同(tong)心(xin)(xin)度方面，不銹(xiu)鋼(gang)焊(han)管(guan)比不銹(xiu)鋼(gang)無(wu)縫(feng)(feng)管(guan)更好。因為冷(leng)軋(ya)(ya)板的板面厚(hou)度公(gong)差比較均勻(yun)(yun)，成型過(guo)程中變形均勻(yun)(yun)。但焊(han)縫(feng)(feng)有(you)凸出，不同(tong)公(gong)司和規范(fan)有(you)不同(tong)的焊(han)高要求(qiu)，特(te)別情(qing)況下可以(yi)先焊(han)再冷(leng)拔或冷(leng)軋(ya)(ya)；無(wu)縫(feng)(feng)管(guan)軋(ya)(ya)制過(guo)程中受設備精度、材料功(gong)(gong)用(yong)等要素影響，存在厚(hou)度不均勻(yun)(yun)、同(tong)心(xin)(xin)度的問題，但是圓度較焊(han)管(guan)好。功(gong)(gong)用(yong)，直縫(feng)(feng)鋼(gang)管(guan)價位(wei)，不銹(xiu)鋼(gang)焊(han)管(guan)的均勻(yun)(yun)性(xing)(xing)更好些、表面質(zhi)量更優(you)(you)。脹管(guan)功(gong)(gong)用(yong)更好。冷(leng)軋(ya)(ya)板的功(gong)(gong)用(yong)均勻(yun)(yun)性(xing)(xing)比管(guan)材的要優(you)(you)，直縫(feng)(feng)鋼(gang)管(guan)直租，而(er)且焊(han)管(guan)一般運用(yong)的是在線固(gu)溶，熱(re)處(chu)理(li)均勻(yun)(yun)，功(gong)(gong)用(yong)更安穩。

雙面埋弧(hu)形(xing)(xing)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)也是直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。埋弧(hu)焊(han)(han)(han)直(zhi)(zhi)焊(han)(han)(han)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)采(cai)用JCOE冷成形(xing)(xing)工藝，焊(han)(han)(han)縫(feng)(feng)(feng)采(cai)用焊(han)(han)(han)絲，同時(shi)采(cai)用顆(ke)粒助焊(han)(han)(han)劑(ji)埋弧(hu)，埋弧(hu)焊(han)(han)(han)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)的(de)(de)主(zhu)要生(sheng)(sheng)產工藝是柔性的(de)(de)，曲靖直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)，可產生(sheng)(sheng)任意(yi)規格，壁(bi)厚325~1420 mm，它(ta)在很(hen)大程度上滿(man)足了國際上對(dui)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)尺(chi)寸的(de)(de)要求(qiu)，而(er)高頻(pin)(pin)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)通常用于國內規范生(sheng)(sheng)產中。高頻(pin)(pin)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)通常被稱(cheng)為原(yuan)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)，該行業的(de)(de)名稱(cheng)與(yu)埋弧(hu)焊(han)(han)(han)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)或熱膨脹高頻(pin)(pin)直(zhi)(zhi)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)不同，它(ta)們的(de)(de)名稱(cheng)經(jing)常被混(hun)淆。