①. 管子按用途分類見表(biao)16.35。

   ②. 按(an)材質分類見表16.36。

   ③. 按(an)制管工藝分類見表16.37。

   ④. 按(an)公(gong)稱壓(ya)力和設計溫度分類

   按管(guan)道(dao)(dao)(dao)(dao)的(de)公(gong)(gong)(gong)稱(cheng)(cheng)(cheng)壓(ya)力(li)劃分(fen)時(shi)，習慣上將真空(kong)管(guan)道(dao)(dao)(dao)(dao)與(yu)低壓(ya)管(guan)道(dao)(dao)(dao)(dao)合并。凡公(gong)(gong)(gong)稱(cheng)(cheng)(cheng)壓(ya)力(li)小于(yu)2.5MPa的(de)管(guan)道(dao)(dao)(dao)(dao)稱(cheng)(cheng)(cheng)為(wei)低壓(ya)管(guan)道(dao)(dao)(dao)(dao)；公(gong)(gong)(gong)稱(cheng)(cheng)(cheng)壓(ya)力(li)為(wei)4～6.4MPa。的(de)管(guan)道(dao)(dao)(dao)(dao)稱(cheng)(cheng)(cheng)為(wei)中壓(ya)管(guan)道(dao)(dao)(dao)(dao)；公(gong)(gong)(gong)稱(cheng)(cheng)(cheng)壓(ya)力(li)為(wei)10～100MPa的(de)管(guan)道(dao)(dao)(dao)(dao)稱(cheng)(cheng)(cheng)為(wei)高壓(ya)管(guan)道(dao)(dao)(dao)(dao)；公(gong)(gong)(gong)稱(cheng)(cheng)(cheng)壓(ya)力(li)大于(yu)100MPa。的(de)管(guan)道(dao)(dao)(dao)(dao)稱(cheng)(cheng)(cheng)為(wei)超高壓(ya)管(guan)道(dao)(dao)(dao)(dao)。

   按(an)管(guan)(guan)道(dao)(dao)(dao)工(gong)(gong)作溫(wen)(wen)度(du)劃(hua)分時，習(xi)慣(guan)上將-40～120℃溫(wen)(wen)度(du)范圍內工(gong)(gong)作的管(guan)(guan)道(dao)(dao)(dao)稱(cheng)為(wei)(wei)常溫(wen)(wen)管(guan)(guan)道(dao)(dao)(dao)；將在120～450℃溫(wen)(wen)度(du)范圍內工(gong)(gong)作的管(guan)(guan)道(dao)(dao)(dao)稱(cheng)為(wei)(wei)中溫(wen)(wen)管(guan)(guan)道(dao)(dao)(dao)；將在高(gao)于(yu)450℃溫(wen)(wen)度(du)下工(gong)(gong)作的管(guan)(guan)道(dao)(dao)(dao)稱(cheng)為(wei)(wei)高(gao)溫(wen)(wen)管(guan)(guan)道(dao)(dao)(dao)；將工(gong)(gong)作于(yu)-40℃以下溫(wen)(wen)度(du)環(huan)境的管(guan)(guan)道(dao)(dao)(dao)稱(cheng)為(wei)(wei)低溫(wen)(wen)管(guan)(guan)道(dao)(dao)(dao)。

工(gong)程應用：某管子分類不(bu)清引起的事故

   某DN2000的(de)(de)(de)火炬氣管(guan)(guan)子(zi)，為GB9711.2標(biao)(biao)準的(de)(de)(de)L245有(you)縫(feng)(feng)(feng)管(guan)(guan)子(zi)。設(she)計的(de)(de)(de)是(shi)GB9711.2標(biao)(biao)準的(de)(de)(de)直縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)。但(dan)是(shi)，在訂貨材(cai)料單的(de)(de)(de)描述內沒有(you)寫(xie)清(qing)楚是(shi)GB 9711.2標(biao)(biao)準的(de)(de)(de)直縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)還(huan)是(shi)GB9711.2標(biao)(biao)準的(de)(de)(de)螺縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)，結(jie)果到施工(gong)現場(chang)的(de)(de)(de)是(shi)GB9711.2標(biao)(biao)準的(de)(de)(de)螺縫(feng)(feng)(feng)鋼(gang)管(guan)(guan)，出現了(le)因管(guan)(guan)子(zi)分類不清(qing)引起的(de)(de)(de)采購事故。

工程(cheng)應用：Pipe管與(yu)Tube管的應用

   Pipe管(guan)(guan)作(zuo)為(wei)輸送用(yong)的(de)管(guan)(guan)道，用(yong)公稱直徑命名；Tube 管(guan)(guan)作(zuo)為(wei)傳(chuan)熱用(yong)的(de)管(guan)(guan)，用(yong)“外(wai)徑x壁(bi)厚”表(biao)示，Tubing 管(guan)(guan)作(zuo)為(wei)（儀表(biao)、伴熱、油(you)路）管(guan)(guan)路，用(yong)“外(wai)徑X壁(bi)厚”表(biao)示。

   鋼管(guan)(guan)標(biao)(biao)準可以分為Pipe管(guan)(guan)標(biao)(biao)準、Tube管(guan)(guan)標(biao)(biao)準和機(ji)械結構鋼管(guan)(guan)標(biao)(biao)準。Pipe管(guan)(guan)與Tube管(guan)(guan)的比較見表 16.38 。