精密無縫鋼管的分類：精密無縫鋼管分精密無縫鋼管和焊接(jie)精(jing)密無(wu)(wu)縫鋼(gang)管(guan)(guan)(有(you)縫管(guan)(guan))兩大類。按斷面形(xing)(xing)(xing)狀又可分(fen)為圓管(guan)(guan)和異形(xing)(xing)(xing)管(guan)(guan)，廣泛應用的是圓形(xing)(xing)(xing)精(jing)密無(wu)(wu)縫鋼(gang)管(guan)(guan)，但也有(you)一些方形(xing)(xing)(xing)、矩形(xing)(xing)(xing)、半(ban)圓形(xing)(xing)(xing)、六角形(xing)(xing)(xing)、等(deng)邊(bian)三角形(xing)(xing)(xing)、八角形(xing)(xing)(xing)等(deng)異形(xing)(xing)(xing)精(jing)密無(wu)(wu)縫鋼(gang)管(guan)(guan)。對于承(cheng)受流體(ti)壓力(li)的精(jing)密無(wu)(wu)縫鋼(gang)管(guan)(guan)都要進行液壓試(shi)驗(yan)來檢驗(yan)其耐壓能力(li)和質量(liang)，在(zai)規定(ding)的壓力(li)下不發生泄漏、浸濕(shi)或膨(peng)脹為合格，有(you)些精(jing)密無(wu)(wu)縫鋼(gang)管(guan)(guan)還要根據標準(zhun)或需(xu)方要求進行卷邊(bian)試(shi)驗(yan)、擴口試(shi)驗(yan)、壓扁試(shi)驗(yan)等(deng)。
第(di)二，精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是用(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)錠或實心管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯經(jing)穿孔制成(cheng)毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，然后經(jing)熱(re)軋、冷(leng)(leng)(leng)軋或冷(leng)(leng)(leng)撥(bo)(bo)制成(cheng)。精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)規格用(yong)外(wai)徑(jing)*壁(bi)(bi)厚(hou)(hou)毫米數(shu)表示。精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)熱(re)軋和冷(leng)(leng)(leng)軋(撥(bo)(bo))精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩類(lei)。熱(re)軋精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)一般精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，低、中壓(ya)鍋爐精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，高壓(ya)鍋爐精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金(jin)精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和其(qi)它精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)。冷(leng)(leng)(leng)軋(撥(bo)(bo))精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)除分(fen)一般精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低中壓(ya)鍋爐精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、高壓(ya)鍋爐精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金(jin)精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石油裂化(hua)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、其(qi)它精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)，還包括(kuo)碳素薄(bo)壁(bi)(bi)精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金(jin)薄(bo)壁(bi)(bi)精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹薄(bo)壁(bi)(bi)精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。熱(re)軋無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)一般大(da)于32mm，壁(bi)(bi)厚(hou)(hou)2.5-75mm，冷(leng)(leng)(leng)軋精(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)處徑(jing)可以到6mm，壁(bi)(bi)厚(hou)(hou)可到0.25mm，薄(bo)壁(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)可到5mm壁(bi)(bi)厚(hou)(hou)小(xiao)于0.25mm，冷(leng)(leng)(leng)軋比熱(re)軋尺(chi)寸精(jing)(jing)(jing)(jing)度高。
第三，一般用精密無縫鋼管是用(yong)10、20、30、35、45等優質碳(tan)結鋼16Mn、5MnV等低合金結構鋼或(huo)40Cr、30CrMnSi、45Mn2、40MnB等合結鋼熱軋(ya)(ya)或(huo)冷(leng)軋(ya)(ya)制成(cheng)的(de)。10、20等低碳(tan)鋼制造(zao)的(de)無(wu)縫(feng)(feng)管(guan)(guan)主要用(yong)于流體輸送管(guan)(guan)道。45、40Cr等中碳(tan)鋼制成(cheng)的(de)無(wu)縫(feng)(feng)管(guan)(guan)用(yong)來制造(zao)機(ji)械零件，如汽車(che)、拖(tuo)拉機(ji)的(de)受力零件。一般(ban)用(yong)精(jing)密(mi)無(wu)縫(feng)(feng)鋼管(guan)(guan)要保證(zheng)強度(du)和壓扁試驗。熱軋(ya)(ya)精(jing)密(mi)無(wu)縫(feng)(feng)鋼管(guan)(guan)以(yi)熱軋(ya)(ya)狀(zhuang)態(tai)或(huo)熱處理(li)(li)狀(zhuang)態(tai)交貨;冷(leng)軋(ya)(ya)以(yi)熱以(yi)熱處理(li)(li)狀(zhuang)態(tai)交貨。
