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精(jing)(jing)(jing)密(mi)無縫鋼(gang)管(guan)(guan)(有縫管(guan)(guan))兩大類。按(an)斷(duan)面形(xing)(xing)(xing)狀又可分為圓管(guan)(guan)和異形(xing)(xing)(xing)管(guan)(guan)，廣(guang)泛應用的是圓形(xing)(xing)(xing)精(jing)(jing)(jing)密(mi)無縫鋼(gang)管(guan)(guan)，但(dan)也有一些方形(xing)(xing)(xing)、矩(ju)形(xing)(xing)(xing)、半(ban)圓形(xing)(xing)(xing)、六(liu)角(jiao)(jiao)(jiao)形(xing)(xing)(xing)、等邊三角(jiao)(jiao)(jiao)形(xing)(xing)(xing)、八角(jiao)(jiao)(jiao)形(xing)(xing)(xing)等異形(xing)(xing)(xing)精(jing)(jing)(jing)密(mi)無縫鋼(gang)管(guan)(guan)。對于承受流(liu)體壓(ya)力(li)的精(jing)(jing)(jing)密(mi)無縫鋼(gang)管(guan)(guan)都要進行液壓(ya)試(shi)驗來(lai)檢驗其(qi)耐壓(ya)能(neng)力(li)和質(zhi)量，在(zai)規定的壓(ya)力(li)下不發生泄漏、浸濕或(huo)膨脹為合格，有些精(jing)(jing)(jing)密(mi)無縫鋼(gang)管(guan)(guan)還要根據標準或(huo)需(xu)方要求進行卷邊試(shi)驗、擴口試(shi)驗、壓(ya)扁試(shi)驗等。
第二，精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)是(shi)用鋼(gang)(gang)(gang)(gang)錠或實心管(guan)(guan)(guan)(guan)(guan)坯經穿(chuan)孔制(zhi)(zhi)成毛管(guan)(guan)(guan)(guan)(guan)，然后經熱(re)(re)軋(ya)(ya)(ya)、冷(leng)(leng)軋(ya)(ya)(ya)或冷(leng)(leng)撥(bo)制(zhi)(zhi)成。精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的規格用外(wai)徑*壁(bi)厚(hou)(hou)毫米數表(biao)示。精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分(fen)(fen)熱(re)(re)軋(ya)(ya)(ya)和冷(leng)(leng)軋(ya)(ya)(ya)(撥(bo))精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)兩類。熱(re)(re)軋(ya)(ya)(ya)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分(fen)(fen)一般(ban)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，低、中壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，高壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、合(he)金(jin)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、石(shi)油裂(lie)化管(guan)(guan)(guan)(guan)(guan)、地質精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)和其它精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)等。冷(leng)(leng)軋(ya)(ya)(ya)(撥(bo))精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)除分(fen)(fen)一般(ban)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、低中壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、高壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、合(he)金(jin)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、石(shi)油裂(lie)化管(guan)(guan)(guan)(guan)(guan)、其它精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)外(wai)，還包括碳素薄壁(bi)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、合(he)金(jin)薄壁(bi)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)薄壁(bi)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、異型精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。熱(re)(re)軋(ya)(ya)(ya)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)外(wai)徑一般(ban)大于32mm，壁(bi)厚(hou)(hou)2.5-75mm，冷(leng)(leng)軋(ya)(ya)(ya)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)處徑可(ke)以到6mm，壁(bi)厚(hou)(hou)可(ke)到0.25mm，薄壁(bi)管(guan)(guan)(guan)(guan)(guan)外(wai)徑可(ke)到5mm壁(bi)厚(hou)(hou)小于0.25mm，冷(leng)(leng)軋(ya)(ya)(ya)比熱(re)(re)軋(ya)(ya)(ya)尺寸精(jing)(jing)(jing)(jing)(jing)(jing)(jing)度高。
第三，一般用精密無縫鋼管是用10、20、30、35、45等(deng)(deng)優質(zhi)碳(tan)(tan)結鋼(gang)(gang)16Mn、5MnV等(deng)(deng)低(di)合金結構鋼(gang)(gang)或40Cr、30CrMnSi、45Mn2、40MnB等(deng)(deng)合結鋼(gang)(gang)熱軋(ya)或冷軋(ya)制成的(de)(de)。10、20等(deng)(deng)低(di)碳(tan)(tan)鋼(gang)(gang)制造的(de)(de)無(wu)縫(feng)(feng)管主(zhu)要用于流體(ti)輸送(song)管道。45、40Cr等(deng)(deng)中碳(tan)(tan)鋼(gang)(gang)制成的(de)(de)無(wu)縫(feng)(feng)管用來(lai)制造機械零件(jian)，如汽車(che)、拖(tuo)拉機的(de)(de)受力零件(jian)。一般用精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)(gang)管要保證(zheng)強(qiang)度(du)和壓扁(bian)試驗。熱軋(ya)精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)(gang)管以(yi)熱軋(ya)狀(zhuang)態(tai)或熱處(chu)理狀(zhuang)態(tai)交(jiao)貨(huo);冷軋(ya)以(yi)熱以(yi)熱處(chu)理狀(zhuang)態(tai)交(jiao)貨(huo)。
