①. 管子按用途分(fen)類見表(biao)16.35。

   ②. 按材質分(fen)類(lei)見表16.36。

   ③. 按制管工藝分類見(jian)表16.37。

   ④. 按公稱壓力和設計溫度分類

   按管(guan)(guan)(guan)道(dao)(dao)的公(gong)稱(cheng)壓(ya)(ya)(ya)力(li)劃分時，習慣上(shang)將(jiang)真空管(guan)(guan)(guan)道(dao)(dao)與低壓(ya)(ya)(ya)管(guan)(guan)(guan)道(dao)(dao)合并。凡(fan)公(gong)稱(cheng)壓(ya)(ya)(ya)力(li)小于2.5MPa的管(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)低壓(ya)(ya)(ya)管(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)(ya)(ya)力(li)為(wei)4～6.4MPa。的管(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)中壓(ya)(ya)(ya)管(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)(ya)(ya)力(li)為(wei)10～100MPa的管(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)高(gao)壓(ya)(ya)(ya)管(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)壓(ya)(ya)(ya)力(li)大于100MPa。的管(guan)(guan)(guan)道(dao)(dao)稱(cheng)為(wei)超高(gao)壓(ya)(ya)(ya)管(guan)(guan)(guan)道(dao)(dao)。

   按管(guan)(guan)(guan)道工(gong)作(zuo)溫(wen)(wen)(wen)度(du)(du)劃(hua)分時，習慣上(shang)將(jiang)-40～120℃溫(wen)(wen)(wen)度(du)(du)范圍(wei)(wei)內工(gong)作(zuo)的管(guan)(guan)(guan)道稱為(wei)常溫(wen)(wen)(wen)管(guan)(guan)(guan)道；將(jiang)在120～450℃溫(wen)(wen)(wen)度(du)(du)范圍(wei)(wei)內工(gong)作(zuo)的管(guan)(guan)(guan)道稱為(wei)中溫(wen)(wen)(wen)管(guan)(guan)(guan)道；將(jiang)在高于450℃溫(wen)(wen)(wen)度(du)(du)下(xia)工(gong)作(zuo)的管(guan)(guan)(guan)道稱為(wei)高溫(wen)(wen)(wen)管(guan)(guan)(guan)道；將(jiang)工(gong)作(zuo)于-40℃以下(xia)溫(wen)(wen)(wen)度(du)(du)環境的管(guan)(guan)(guan)道稱為(wei)低溫(wen)(wen)(wen)管(guan)(guan)(guan)道。

工程應用：某管子(zi)分類不(bu)清引(yin)起的事(shi)故(gu)

   某DN2000的火炬氣管子(zi)，為GB9711.2標(biao)準(zhun)的L245有縫(feng)管子(zi)。設計的是GB9711.2標(biao)準(zhun)的直縫(feng)鋼管。但是，在訂貨材料單的描(miao)述內沒有寫清楚是GB 9711.2標(biao)準(zhun)的直縫(feng)鋼管還是GB9711.2標(biao)準(zhun)的螺(luo)縫(feng)鋼管，結(jie)果到(dao)施工現(xian)場的是GB9711.2標(biao)準(zhun)的螺(luo)縫(feng)鋼管，出現(xian)了因(yin)管子(zi)分(fen)類不清引起的采購事故(gu)。

工(gong)程應用：Pipe管與(yu)Tube管的應用

   Pipe管(guan)作為(wei)輸送用的(de)管(guan)道，用公(gong)稱直徑(jing)命名；Tube 管(guan)作為(wei)傳(chuan)熱(re)用的(de)管(guan)，用“外徑(jing)x壁(bi)厚(hou)”表(biao)示(shi)，Tubing 管(guan)作為(wei)（儀表(biao)、伴熱(re)、油路）管(guan)路，用“外徑(jing)X壁(bi)厚(hou)”表(biao)示(shi)。

   鋼(gang)管(guan)標(biao)準可以分為Pipe管(guan)標(biao)準、Tube管(guan)標(biao)準和機械結(jie)構鋼(gang)管(guan)標(biao)準。Pipe管(guan)與Tube管(guan)的比較見(jian)表 16.38 。