不銹鋼管按(an)橫斷(duan)面(mian)形(xing)(xing)狀(zhuang)可(ke)分為(wei)圓(yuan)管(guan)(guan)和(he)異(yi)(yi)形(xing)(xing)管(guan)(guan)。異(yi)(yi)形(xing)(xing)管(guan)(guan)有矩形(xing)(xing)管(guan)(guan)、菱形(xing)(xing)管(guan)(guan)、橢圓(yuan)管(guan)(guan)、六方管(guan)(guan)、八方管(guan)(guan)以及各(ge)種斷(duan)面(mian)不對稱管(guan)(guan)等。異(yi)(yi)形(xing)(xing)管(guan)(guan)廣泛(fan)地用(yong)于(yu)各(ge)種結(jie)構(gou)件、工具和(he)機械零部件。與(yu)圓(yuan)管(guan)(guan)相比，異(yi)(yi)形(xing)(xing)管(guan)(guan)一般都有較大的慣性(xing)矩和(he)截面(mian)模數，有較大的抗彎、抗扭能(neng)力，可(ke)以大大減輕結(jie)構(gou)重量，節約鋼材。
不(bu)銹鋼管按縱(zong)斷面(mian)形(xing)狀可分為等斷面(mian)管和變斷面(mian)管。變斷面(mian)管有錐形(xing)管、階梯形(xing)管和周期斷面(mian)管等。
管端形狀
不銹(xiu)鋼管(guan)(guan)(guan)(guan)根據管(guan)(guan)(guan)(guan)端(duan)狀態可分為光管(guan)(guan)(guan)(guan)和(he)車絲(si)(si)管(guan)(guan)(guan)(guan)（帶螺紋(wen)(wen)鋼管(guan)(guan)(guan)(guan)）。車絲(si)(si)管(guan)(guan)(guan)(guan)又(you)可分為普通車絲(si)(si)管(guan)(guan)(guan)(guan)（輸送水(shui)、煤氣等(deng)低壓用(yong)管(guan)(guan)(guan)(guan)，采用(yong)普通圓柱或(huo)圓錐(zhui)管(guan)(guan)(guan)(guan)螺紋(wen)(wen)連接(jie)）和(he)特殊(shu)(shu)螺紋(wen)(wen)管(guan)(guan)(guan)(guan)（石(shi)油、地質鉆(zhan)探用(yong)管(guan)(guan)(guan)(guan)，對于重要的車絲(si)(si)管(guan)(guan)(guan)(guan)，采用(yong)特殊(shu)(shu)螺紋(wen)(wen)連接(jie)），對一些(xie)特殊(shu)(shu)用(yong)管(guan)(guan)(guan)(guan)，為彌補螺紋(wen)(wen)對管(guan)(guan)(guan)(guan)端(duan)強度的影響，通常在車絲(si)(si)前先進行(xing)管(guan)(guan)(guan)(guan)端(duan)加厚(hou)（內(nei)加厚(hou)、外(wai)加厚(hou)或(huo)內(nei)外(wai)加厚(hou)）。
