①. 管子(zi)按用(yong)途分(fen)類(lei)見表16.35。

   ②. 按材質(zhi)分(fen)類(lei)見表16.36。

   ③. 按制(zhi)管工藝分類見表16.37。

   ④. 按公稱壓力和(he)設計溫度(du)分(fen)類(lei)

   按(an)管(guan)(guan)(guan)道的公(gong)稱(cheng)(cheng)壓(ya)(ya)力劃分(fen)時，習慣上將(jiang)真空管(guan)(guan)(guan)道與低(di)壓(ya)(ya)管(guan)(guan)(guan)道合并(bing)。凡公(gong)稱(cheng)(cheng)壓(ya)(ya)力小(xiao)于(yu)2.5MPa的管(guan)(guan)(guan)道稱(cheng)(cheng)為(wei)低(di)壓(ya)(ya)管(guan)(guan)(guan)道；公(gong)稱(cheng)(cheng)壓(ya)(ya)力為(wei)4～6.4MPa。的管(guan)(guan)(guan)道稱(cheng)(cheng)為(wei)中(zhong)壓(ya)(ya)管(guan)(guan)(guan)道；公(gong)稱(cheng)(cheng)壓(ya)(ya)力為(wei)10～100MPa的管(guan)(guan)(guan)道稱(cheng)(cheng)為(wei)高壓(ya)(ya)管(guan)(guan)(guan)道；公(gong)稱(cheng)(cheng)壓(ya)(ya)力大于(yu)100MPa。的管(guan)(guan)(guan)道稱(cheng)(cheng)為(wei)超高壓(ya)(ya)管(guan)(guan)(guan)道。

   按管(guan)道(dao)工(gong)作(zuo)(zuo)(zuo)(zuo)溫(wen)(wen)度劃分時(shi)，習慣上將(jiang)(jiang)-40～120℃溫(wen)(wen)度范圍(wei)內工(gong)作(zuo)(zuo)(zuo)(zuo)的(de)管(guan)道(dao)稱(cheng)(cheng)為常溫(wen)(wen)管(guan)道(dao)；將(jiang)(jiang)在120～450℃溫(wen)(wen)度范圍(wei)內工(gong)作(zuo)(zuo)(zuo)(zuo)的(de)管(guan)道(dao)稱(cheng)(cheng)為中溫(wen)(wen)管(guan)道(dao)；將(jiang)(jiang)在高(gao)于450℃溫(wen)(wen)度下工(gong)作(zuo)(zuo)(zuo)(zuo)的(de)管(guan)道(dao)稱(cheng)(cheng)為高(gao)溫(wen)(wen)管(guan)道(dao)；將(jiang)(jiang)工(gong)作(zuo)(zuo)(zuo)(zuo)于-40℃以下溫(wen)(wen)度環(huan)境的(de)管(guan)道(dao)稱(cheng)(cheng)為低溫(wen)(wen)管(guan)道(dao)。

工程(cheng)應(ying)用：某管子(zi)分類(lei)不(bu)清引起的事故

   某DN2000的(de)(de)火(huo)炬(ju)氣管(guan)子，為GB9711.2標(biao)(biao)(biao)(biao)準(zhun)的(de)(de)L245有縫管(guan)子。設計的(de)(de)是(shi)GB9711.2標(biao)(biao)(biao)(biao)準(zhun)的(de)(de)直縫鋼(gang)(gang)管(guan)。但是(shi)，在(zai)訂貨(huo)材料單的(de)(de)描述(shu)內沒有寫(xie)清(qing)楚是(shi)GB 9711.2標(biao)(biao)(biao)(biao)準(zhun)的(de)(de)直縫鋼(gang)(gang)管(guan)還是(shi)GB9711.2標(biao)(biao)(biao)(biao)準(zhun)的(de)(de)螺縫鋼(gang)(gang)管(guan)，結果到施(shi)工現(xian)場的(de)(de)是(shi)GB9711.2標(biao)(biao)(biao)(biao)準(zhun)的(de)(de)螺縫鋼(gang)(gang)管(guan)，出(chu)現(xian)了因(yin)管(guan)子分(fen)類不清(qing)引起的(de)(de)采購事故。

工(gong)程(cheng)應(ying)用(yong)：Pipe管與Tube管的應(ying)用(yong)

   Pipe管(guan)作(zuo)為輸送(song)用(yong)(yong)的管(guan)道，用(yong)(yong)公(gong)稱直徑命名；Tube 管(guan)作(zuo)為傳熱(re)用(yong)(yong)的管(guan)，用(yong)(yong)“外徑x壁厚”表(biao)示，Tubing 管(guan)作(zuo)為（儀表(biao)、伴熱(re)、油路(lu)）管(guan)路(lu)，用(yong)(yong)“外徑X壁厚”表(biao)示。

   鋼管(guan)(guan)標(biao)準(zhun)(zhun)可以(yi)分(fen)為Pipe管(guan)(guan)標(biao)準(zhun)(zhun)、Tube管(guan)(guan)標(biao)準(zhun)(zhun)和機械(xie)結構(gou)鋼管(guan)(guan)標(biao)準(zhun)(zhun)。Pipe管(guan)(guan)與Tube管(guan)(guan)的比較見(jian)表 16.38 。