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)密(mi)(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)(有縫(feng)(feng)管(guan))兩大類。按斷面形(xing)(xing)狀又可分為圓管(guan)和異(yi)形(xing)(xing)管(guan)，廣(guang)泛(fan)應用的(de)是圓形(xing)(xing)精(jing)密(mi)(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)，但也有一些(xie)方形(xing)(xing)、矩(ju)形(xing)(xing)、半(ban)圓形(xing)(xing)、六角形(xing)(xing)、等(deng)邊三角形(xing)(xing)、八角形(xing)(xing)等(deng)異(yi)形(xing)(xing)精(jing)密(mi)(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)。對于(yu)承受流體壓(ya)力的(de)精(jing)密(mi)(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)都要進(jin)行液壓(ya)試驗(yan)(yan)(yan)來檢驗(yan)(yan)(yan)其耐壓(ya)能力和質量(liang)，在規定的(de)壓(ya)力下不發(fa)生泄(xie)漏、浸(jin)濕或(huo)膨脹為合格，有些(xie)精(jing)密(mi)(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)還要根(gen)據標準或(huo)需方要求進(jin)行卷邊試驗(yan)(yan)(yan)、擴口(kou)試驗(yan)(yan)(yan)、壓(ya)扁試驗(yan)(yan)(yan)等(deng)。
第二，精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是用鋼(gang)(gang)(gang)(gang)(gang)錠或(huo)實(shi)心管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯經(jing)穿孔制(zhi)成毛管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，然(ran)后經(jing)熱(re)軋(ya)、冷(leng)(leng)軋(ya)或(huo)冷(leng)(leng)撥制(zhi)成。精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)規格用外(wai)(wai)(wai)徑*壁(bi)(bi)(bi)厚毫米數(shu)表示。精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分熱(re)軋(ya)和冷(leng)(leng)軋(ya)(撥)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)兩(liang)類(lei)。熱(re)軋(ya)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分一(yi)般精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，低、中壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，高(gao)(gao)壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油(you)(you)裂化管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、地質(zhi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和其它精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等。冷(leng)(leng)軋(ya)(撥)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)除分一(yi)般精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低中壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、高(gao)(gao)壓(ya)(ya)鍋(guo)爐精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、石(shi)油(you)(you)裂化管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、其它精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)(wai)(wai)，還包括碳素薄壁(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、合金薄壁(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、不銹薄壁(bi)(bi)(bi)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。熱(re)軋(ya)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)(wai)(wai)徑一(yi)般大(da)于32mm，壁(bi)(bi)(bi)厚2.5-75mm，冷(leng)(leng)軋(ya)精(jing)(jing)(jing)(jing)(jing)密(mi)(mi)無(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)處徑可以到6mm，壁(bi)(bi)(bi)厚可到0.25mm，薄壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)外(wai)(wai)(wai)徑可到5mm壁(bi)(bi)(bi)厚小于0.25mm，冷(leng)(leng)軋(ya)比熱(re)軋(ya)尺寸精(jing)(jing)(jing)(jing)(jing)度高(gao)(gao)。
第三，一般用精密無縫鋼管是用(yong)10、20、30、35、45等(deng)優質(zhi)碳(tan)(tan)結鋼(gang)(gang)16Mn、5MnV等(deng)低合(he)金結構鋼(gang)(gang)或40Cr、30CrMnSi、45Mn2、40MnB等(deng)合(he)結鋼(gang)(gang)熱(re)軋(ya)或冷軋(ya)制成的。10、20等(deng)低碳(tan)(tan)鋼(gang)(gang)制造的無(wu)(wu)縫管(guan)主要用(yong)于流(liu)體輸送管(guan)道。45、40Cr等(deng)中(zhong)碳(tan)(tan)鋼(gang)(gang)制成的無(wu)(wu)縫管(guan)用(yong)來制造機械零(ling)件，如汽車、拖拉(la)機的受(shou)力零(ling)件。一般(ban)用(yong)精密(mi)無(wu)(wu)縫鋼(gang)(gang)管(guan)要保(bao)證強度和(he)壓(ya)扁(bian)試驗。熱(re)軋(ya)精密(mi)無(wu)(wu)縫鋼(gang)(gang)管(guan)以(yi)熱(re)軋(ya)狀(zhuang)態或熱(re)處理(li)狀(zhuang)態交(jiao)貨;冷軋(ya)以(yi)熱(re)以(yi)熱(re)處理(li)狀(zhuang)態交(jiao)貨。
