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)精密無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)(有縫(feng)(feng)(feng)管(guan)(guan)(guan))兩大類。按(an)斷面(mian)形(xing)(xing)(xing)狀又可分為圓管(guan)(guan)(guan)和異形(xing)(xing)(xing)管(guan)(guan)(guan)，廣泛(fan)應用的(de)是圓形(xing)(xing)(xing)精密無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)，但也有一些(xie)方形(xing)(xing)(xing)、矩形(xing)(xing)(xing)、半圓形(xing)(xing)(xing)、六角形(xing)(xing)(xing)、等邊(bian)三(san)角形(xing)(xing)(xing)、八角形(xing)(xing)(xing)等異形(xing)(xing)(xing)精密無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)。對于承受流體(ti)壓(ya)力(li)(li)的(de)精密無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)都(dou)要(yao)進行液(ye)壓(ya)試(shi)(shi)驗(yan)(yan)來檢驗(yan)(yan)其耐壓(ya)能力(li)(li)和質量，在規(gui)定的(de)壓(ya)力(li)(li)下不發生泄漏、浸濕或膨脹為合格，有些(xie)精密無(wu)縫(feng)(feng)(feng)鋼(gang)(gang)管(guan)(guan)(guan)還要(yao)根據標(biao)準或需方要(yao)求(qiu)進行卷邊(bian)試(shi)(shi)驗(yan)(yan)、擴(kuo)口試(shi)(shi)驗(yan)(yan)、壓(ya)扁試(shi)(shi)驗(yan)(yan)等。
第二(er)，精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)用鋼(gang)(gang)(gang)(gang)錠或(huo)實心(xin)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)經穿孔制成(cheng)毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，然(ran)后經熱(re)(re)軋(ya)(ya)、冷(leng)軋(ya)(ya)或(huo)冷(leng)撥(bo)(bo)制成(cheng)。精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的規格用外(wai)徑(jing)(jing)*壁(bi)(bi)(bi)(bi)厚毫米數(shu)表示。精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分熱(re)(re)軋(ya)(ya)和(he)(he)冷(leng)軋(ya)(ya)(撥(bo)(bo))精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩類。熱(re)(re)軋(ya)(ya)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分一(yi)(yi)般(ban)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，低(di)、中(zhong)壓鍋(guo)爐(lu)(lu)(lu)(lu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，高壓鍋(guo)爐(lu)(lu)(lu)(lu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油(you)裂(lie)化管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地(di)質精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)其它精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等。冷(leng)軋(ya)(ya)(撥(bo)(bo))精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)除(chu)分一(yi)(yi)般(ban)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低(di)中(zhong)壓鍋(guo)爐(lu)(lu)(lu)(lu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、高壓鍋(guo)爐(lu)(lu)(lu)(lu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油(you)裂(lie)化管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、其它精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)，還包括碳素薄壁(bi)(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合(he)(he)金(jin)薄壁(bi)(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不(bu)銹(xiu)薄壁(bi)(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。熱(re)(re)軋(ya)(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)一(yi)(yi)般(ban)大(da)于32mm，壁(bi)(bi)(bi)(bi)厚2.5-75mm，冷(leng)軋(ya)(ya)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)處(chu)徑(jing)(jing)可(ke)以到6mm，壁(bi)(bi)(bi)(bi)厚可(ke)到0.25mm，薄壁(bi)(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)可(ke)到5mm壁(bi)(bi)(bi)(bi)厚小于0.25mm，冷(leng)軋(ya)(ya)比熱(re)(re)軋(ya)(ya)尺(chi)寸(cun)精(jing)(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(deng)(deng)優質碳(tan)結鋼(gang)(gang)(gang)16Mn、5MnV等(deng)(deng)低合金結構鋼(gang)(gang)(gang)或(huo)40Cr、30CrMnSi、45Mn2、40MnB等(deng)(deng)合結鋼(gang)(gang)(gang)熱(re)軋或(huo)冷(leng)軋制(zhi)(zhi)成的。10、20等(deng)(deng)低碳(tan)鋼(gang)(gang)(gang)制(zhi)(zhi)造的無縫(feng)(feng)管主要用(yong)于流體輸(shu)送管道(dao)。45、40Cr等(deng)(deng)中碳(tan)鋼(gang)(gang)(gang)制(zhi)(zhi)成的無縫(feng)(feng)管用(yong)來制(zhi)(zhi)造機械零件(jian)，如汽(qi)車、拖(tuo)拉機的受力零件(jian)。一般用(yong)精密無縫(feng)(feng)鋼(gang)(gang)(gang)管要保證強度和壓(ya)扁(bian)試驗。熱(re)軋精密無縫(feng)(feng)鋼(gang)(gang)(gang)管以(yi)熱(re)軋狀態或(huo)熱(re)處(chu)理狀態交貨;冷(leng)軋以(yi)熱(re)以(yi)熱(re)處(chu)理狀態交貨。
