①. 管子按(an)用途分類見表16.35。

   ②. 按材質分類(lei)見表16.36。

   ③. 按制(zhi)管工藝分類(lei)見(jian)表16.37。

   ④. 按公稱壓力和(he)設(she)計溫度分(fen)類(lei)

   按管(guan)道(dao)(dao)的(de)公稱(cheng)壓(ya)力(li)(li)(li)劃(hua)分時(shi)，習慣上將(jiang)真空管(guan)道(dao)(dao)與低(di)壓(ya)管(guan)道(dao)(dao)合并。凡公稱(cheng)壓(ya)力(li)(li)(li)小于(yu)(yu)2.5MPa的(de)管(guan)道(dao)(dao)稱(cheng)為(wei)低(di)壓(ya)管(guan)道(dao)(dao)；公稱(cheng)壓(ya)力(li)(li)(li)為(wei)4～6.4MPa。的(de)管(guan)道(dao)(dao)稱(cheng)為(wei)中壓(ya)管(guan)道(dao)(dao)；公稱(cheng)壓(ya)力(li)(li)(li)為(wei)10～100MPa的(de)管(guan)道(dao)(dao)稱(cheng)為(wei)高壓(ya)管(guan)道(dao)(dao)；公稱(cheng)壓(ya)力(li)(li)(li)大于(yu)(yu)100MPa。的(de)管(guan)道(dao)(dao)稱(cheng)為(wei)超高壓(ya)管(guan)道(dao)(dao)。

   按管(guan)道(dao)(dao)(dao)工(gong)(gong)作(zuo)溫(wen)(wen)度劃分時，習慣上將(jiang)-40～120℃溫(wen)(wen)度范圍內工(gong)(gong)作(zuo)的管(guan)道(dao)(dao)(dao)稱(cheng)(cheng)為(wei)常溫(wen)(wen)管(guan)道(dao)(dao)(dao)；將(jiang)在(zai)(zai)120～450℃溫(wen)(wen)度范圍內工(gong)(gong)作(zuo)的管(guan)道(dao)(dao)(dao)稱(cheng)(cheng)為(wei)中溫(wen)(wen)管(guan)道(dao)(dao)(dao)；將(jiang)在(zai)(zai)高(gao)于450℃溫(wen)(wen)度下工(gong)(gong)作(zuo)的管(guan)道(dao)(dao)(dao)稱(cheng)(cheng)為(wei)高(gao)溫(wen)(wen)管(guan)道(dao)(dao)(dao)；將(jiang)工(gong)(gong)作(zuo)于-40℃以下溫(wen)(wen)度環境的管(guan)道(dao)(dao)(dao)稱(cheng)(cheng)為(wei)低(di)溫(wen)(wen)管(guan)道(dao)(dao)(dao)。

工(gong)程應(ying)用：某管(guan)子(zi)分(fen)類不(bu)清(qing)引起的(de)事故

   某DN2000的(de)(de)(de)(de)(de)火炬(ju)氣管(guan)子(zi)(zi)，為GB9711.2標(biao)準的(de)(de)(de)(de)(de)L245有縫管(guan)子(zi)(zi)。設(she)計的(de)(de)(de)(de)(de)是(shi)GB9711.2標(biao)準的(de)(de)(de)(de)(de)直(zhi)縫鋼(gang)管(guan)。但(dan)是(shi)，在訂貨(huo)材(cai)料單的(de)(de)(de)(de)(de)描述內沒(mei)有寫清(qing)(qing)楚是(shi)GB 9711.2標(biao)準的(de)(de)(de)(de)(de)直(zhi)縫鋼(gang)管(guan)還是(shi)GB9711.2標(biao)準的(de)(de)(de)(de)(de)螺(luo)縫鋼(gang)管(guan)，結果(guo)到施工(gong)現(xian)場的(de)(de)(de)(de)(de)是(shi)GB9711.2標(biao)準的(de)(de)(de)(de)(de)螺(luo)縫鋼(gang)管(guan)，出現(xian)了因管(guan)子(zi)(zi)分類不(bu)清(qing)(qing)引起的(de)(de)(de)(de)(de)采購事故(gu)。

工程應用：Pipe管與Tube管的應用

   Pipe管作為(wei)輸送(song)用(yong)(yong)(yong)(yong)的(de)管道，用(yong)(yong)(yong)(yong)公(gong)稱直徑命(ming)名；Tube 管作為(wei)傳熱(re)用(yong)(yong)(yong)(yong)的(de)管，用(yong)(yong)(yong)(yong)“外徑x壁厚”表(biao)(biao)示，Tubing 管作為(wei)（儀表(biao)(biao)、伴(ban)熱(re)、油(you)路）管路，用(yong)(yong)(yong)(yong)“外徑X壁厚”表(biao)(biao)示。

   鋼(gang)(gang)管(guan)標(biao)準可(ke)以分為(wei)Pipe管(guan)標(biao)準、Tube管(guan)標(biao)準和機械結構(gou)鋼(gang)(gang)管(guan)標(biao)準。Pipe管(guan)與Tube管(guan)的比較見表 16.38 。