①. 管子按用途分類見表(biao)16.35。

   ②. 按材(cai)質分類見表16.36。

   ③. 按制管工藝分類見(jian)表16.37。

   ④. 按(an)公稱壓力(li)和設(she)計溫度分類(lei)

   按管(guan)(guan)(guan)(guan)道(dao)(dao)的公(gong)稱(cheng)壓(ya)力(li)(li)劃分時，習慣上將真(zhen)空管(guan)(guan)(guan)(guan)道(dao)(dao)與低(di)壓(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)合并。凡公(gong)稱(cheng)壓(ya)力(li)(li)小于(yu)2.5MPa的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)低(di)壓(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)力(li)(li)為(wei)4～6.4MPa。的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)中壓(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)力(li)(li)為(wei)10～100MPa的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)高壓(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)力(li)(li)大于(yu)100MPa。的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)超高壓(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)。

   按管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)工作(zuo)溫度(du)劃分時(shi)，習(xi)慣上將(jiang)-40～120℃溫度(du)范圍(wei)內工作(zuo)的(de)(de)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)稱(cheng)為常(chang)溫管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)；將(jiang)在120～450℃溫度(du)范圍(wei)內工作(zuo)的(de)(de)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)稱(cheng)為中溫管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)；將(jiang)在高于(yu)450℃溫度(du)下(xia)工作(zuo)的(de)(de)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)稱(cheng)為高溫管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)；將(jiang)工作(zuo)于(yu)-40℃以下(xia)溫度(du)環境的(de)(de)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)稱(cheng)為低溫管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)。

工程應(ying)用：某管子分(fen)類不(bu)清引起(qi)的事故

   某DN2000的(de)(de)(de)火炬氣(qi)管(guan)(guan)子(zi)，為GB9711.2標(biao)準的(de)(de)(de)L245有縫(feng)(feng)管(guan)(guan)子(zi)。設(she)計的(de)(de)(de)是(shi)GB9711.2標(biao)準的(de)(de)(de)直縫(feng)(feng)鋼管(guan)(guan)。但是(shi)，在訂(ding)貨(huo)材(cai)料單的(de)(de)(de)描述內沒有寫清(qing)楚是(shi)GB 9711.2標(biao)準的(de)(de)(de)直縫(feng)(feng)鋼管(guan)(guan)還是(shi)GB9711.2標(biao)準的(de)(de)(de)螺縫(feng)(feng)鋼管(guan)(guan)，結果到施(shi)工現場(chang)的(de)(de)(de)是(shi)GB9711.2標(biao)準的(de)(de)(de)螺縫(feng)(feng)鋼管(guan)(guan)，出現了因(yin)管(guan)(guan)子(zi)分類(lei)不(bu)清(qing)引起(qi)的(de)(de)(de)采購事故。

工程應(ying)用：Pipe管與Tube管的(de)應(ying)用

   Pipe管(guan)作為(wei)(wei)輸送用(yong)(yong)(yong)的管(guan)道，用(yong)(yong)(yong)公稱(cheng)直徑命(ming)名(ming)；Tube 管(guan)作為(wei)(wei)傳熱(re)用(yong)(yong)(yong)的管(guan)，用(yong)(yong)(yong)“外(wai)徑x壁厚”表(biao)示，Tubing 管(guan)作為(wei)(wei)（儀表(biao)、伴(ban)熱(re)、油路）管(guan)路，用(yong)(yong)(yong)“外(wai)徑X壁厚”表(biao)示。

   鋼管(guan)標(biao)(biao)準(zhun)(zhun)可以分為Pipe管(guan)標(biao)(biao)準(zhun)(zhun)、Tube管(guan)標(biao)(biao)準(zhun)(zhun)和(he)機械結構鋼管(guan)標(biao)(biao)準(zhun)(zhun)。Pipe管(guan)與Tube管(guan)的比(bi)較(jiao)見表 16.38 。