①. 管(guan)子按用途分類見表16.35。
②. 按材質分類見表16.36。
③. 按制管工藝(yi)分類(lei)見表16.37。
④. 按公(gong)稱壓力和設計溫度(du)分類
按管(guan)(guan)(guan)(guan)道(dao)(dao)的公(gong)稱(cheng)(cheng)壓(ya)(ya)力(li)劃(hua)分時，習慣上將真(zhen)空管(guan)(guan)(guan)(guan)道(dao)(dao)與低壓(ya)(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)合(he)并(bing)。凡公(gong)稱(cheng)(cheng)壓(ya)(ya)力(li)小(xiao)于2.5MPa的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)(cheng)為(wei)低壓(ya)(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)(cheng)壓(ya)(ya)力(li)為(wei)4～6.4MPa。的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)(cheng)為(wei)中壓(ya)(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)(cheng)壓(ya)(ya)力(li)為(wei)10～100MPa的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)(cheng)為(wei)高壓(ya)(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)；公(gong)稱(cheng)(cheng)壓(ya)(ya)力(li)大于100MPa。的管(guan)(guan)(guan)(guan)道(dao)(dao)稱(cheng)(cheng)為(wei)超高壓(ya)(ya)管(guan)(guan)(guan)(guan)道(dao)(dao)。
按管(guan)道工(gong)(gong)作(zuo)溫(wen)(wen)(wen)度劃分時，習慣(guan)上(shang)將(jiang)-40～120℃溫(wen)(wen)(wen)度范(fan)圍(wei)內(nei)工(gong)(gong)作(zuo)的(de)管(guan)道稱為(wei)(wei)常(chang)溫(wen)(wen)(wen)管(guan)道；將(jiang)在120～450℃溫(wen)(wen)(wen)度范(fan)圍(wei)內(nei)工(gong)(gong)作(zuo)的(de)管(guan)道稱為(wei)(wei)中溫(wen)(wen)(wen)管(guan)道；將(jiang)在高于450℃溫(wen)(wen)(wen)度下(xia)工(gong)(gong)作(zuo)的(de)管(guan)道稱為(wei)(wei)高溫(wen)(wen)(wen)管(guan)道；將(jiang)工(gong)(gong)作(zuo)于-40℃以下(xia)溫(wen)(wen)(wen)度環境的(de)管(guan)道稱為(wei)(wei)低溫(wen)(wen)(wen)管(guan)道。
工(gong)程應用：某管子(zi)分類不清引(yin)起的事故
某DN2000的火炬氣管(guan)(guan)子(zi)，為(wei)GB9711.2標準(zhun)(zhun)的L245有縫(feng)(feng)管(guan)(guan)子(zi)。設計的是(shi)(shi)GB9711.2標準(zhun)(zhun)的直(zhi)縫(feng)(feng)鋼管(guan)(guan)。但是(shi)(shi)，在訂貨材料單的描(miao)述內沒有寫(xie)清楚是(shi)(shi)GB 9711.2標準(zhun)(zhun)的直(zhi)縫(feng)(feng)鋼管(guan)(guan)還(huan)是(shi)(shi)GB9711.2標準(zhun)(zhun)的螺縫(feng)(feng)鋼管(guan)(guan)，結果到施(shi)工現(xian)場的是(shi)(shi)GB9711.2標準(zhun)(zhun)的螺縫(feng)(feng)鋼管(guan)(guan)，出現(xian)了(le)因管(guan)(guan)子(zi)分(fen)類(lei)不清引起(qi)的采購事故。
工程(cheng)應用：Pipe管與Tube管的應用
Pipe管(guan)(guan)作為輸送用的管(guan)(guan)道，用公稱直徑(jing)命(ming)名(ming)；Tube 管(guan)(guan)作為傳熱(re)用的管(guan)(guan)，用“外徑(jing)x壁(bi)(bi)厚”表示，Tubing 管(guan)(guan)作為（儀表、伴(ban)熱(re)、油路(lu)）管(guan)(guan)路(lu)，用“外徑(jing)X壁(bi)(bi)厚”表示。
鋼管(guan)(guan)(guan)標(biao)(biao)準(zhun)可以分(fen)為Pipe管(guan)(guan)(guan)標(biao)(biao)準(zhun)、Tube管(guan)(guan)(guan)標(biao)(biao)準(zhun)和機械結(jie)構鋼管(guan)(guan)(guan)標(biao)(biao)準(zhun)。Pipe管(guan)(guan)(guan)與Tube管(guan)(guan)(guan)的比較見表 16.38 。
