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)密無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(有(you)縫(feng)(feng)(feng)管(guan)(guan))兩(liang)大類。按斷面形(xing)狀又可分為(wei)圓(yuan)管(guan)(guan)和異形(xing)管(guan)(guan)，廣泛(fan)應用的是圓(yuan)形(xing)精(jing)密無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)，但(dan)也(ye)有(you)一些方形(xing)、矩形(xing)、半(ban)圓(yuan)形(xing)、六角形(xing)、等邊三角形(xing)、八角形(xing)等異形(xing)精(jing)密無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)。對于承受流體壓力的精(jing)密無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)都要(yao)進行液壓試(shi)(shi)驗(yan)(yan)來檢驗(yan)(yan)其耐壓能力和質(zhi)量，在規定的壓力下(xia)不(bu)發生泄漏、浸濕或(huo)膨脹(zhang)為(wei)合格，有(you)些精(jing)密無(wu)(wu)縫(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)還(huan)要(yao)根據標準或(huo)需方要(yao)求進行卷邊試(shi)(shi)驗(yan)(yan)、擴口試(shi)(shi)驗(yan)(yan)、壓扁(bian)試(shi)(shi)驗(yan)(yan)等。
第二，精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(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)坯經穿孔制成毛管(guan)(guan)(guan)(guan)(guan)，然后經熱(re)軋(ya)(ya)(ya)、冷(leng)軋(ya)(ya)(ya)或冷(leng)撥制成。精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)的規格用外(wai)徑(jing)(jing)(jing)*壁厚(hou)(hou)毫(hao)米數表示。精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分(fen)熱(re)軋(ya)(ya)(ya)和(he)冷(leng)軋(ya)(ya)(ya)(撥)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)兩類(lei)。熱(re)軋(ya)(ya)(ya)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)分(fen)一般(ban)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，低、中壓(ya)鍋(guo)(guo)爐(lu)(lu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)，高壓(ya)鍋(guo)(guo)爐(lu)(lu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(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)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)(xiu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、石油裂(lie)(lie)化管(guan)(guan)(guan)(guan)(guan)、地(di)質(zhi)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)和(he)其它(ta)(ta)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)等。冷(leng)軋(ya)(ya)(ya)(撥)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)除分(fen)一般(ban)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、低中壓(ya)鍋(guo)(guo)爐(lu)(lu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、高壓(ya)鍋(guo)(guo)爐(lu)(lu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(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)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)(xiu)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、石油裂(lie)(lie)化管(guan)(guan)(guan)(guan)(guan)、其它(ta)(ta)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)外(wai)，還(huan)包括碳素薄壁精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、合(he)金(jin)薄壁精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、不(bu)(bu)銹(xiu)(xiu)薄壁精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)、異(yi)型精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)。熱(re)軋(ya)(ya)(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)(jing)一般(ban)大于(yu)32mm，壁厚(hou)(hou)2.5-75mm，冷(leng)軋(ya)(ya)(ya)精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)密(mi)(mi)(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)處徑(jing)(jing)(jing)可(ke)以(yi)到6mm，壁厚(hou)(hou)可(ke)到0.25mm，薄壁管(guan)(guan)(guan)(guan)(guan)外(wai)徑(jing)(jing)(jing)可(ke)到5mm壁厚(hou)(hou)小于(yu)0.25mm，冷(leng)軋(ya)(ya)(ya)比熱(re)軋(ya)(ya)(ya)尺(chi)寸精(jing)(jing)(jing)(jing)(jing)(jing)(jing)(jing)度(du)高。
第三，一般用精密無縫鋼管是(shi)用(yong)10、20、30、35、45等優質(zhi)碳結鋼16Mn、5MnV等低(di)(di)合(he)金(jin)結構鋼或(huo)40Cr、30CrMnSi、45Mn2、40MnB等合(he)結鋼熱(re)軋或(huo)冷(leng)軋制成的。10、20等低(di)(di)碳鋼制造(zao)的無(wu)縫(feng)(feng)管(guan)主(zhu)要(yao)用(yong)于(yu)流體(ti)輸送管(guan)道。45、40Cr等中碳鋼制成的無(wu)縫(feng)(feng)管(guan)用(yong)來(lai)制造(zao)機(ji)(ji)械零件，如汽車、拖拉機(ji)(ji)的受力零件。一般用(yong)精密無(wu)縫(feng)(feng)鋼管(guan)要(yao)保證強度(du)和壓扁(bian)試驗。熱(re)軋精密無(wu)縫(feng)(feng)鋼管(guan)以熱(re)軋狀(zhuang)態或(huo)熱(re)處理狀(zhuang)態交貨;冷(leng)軋以熱(re)以熱(re)處理狀(zhuang)態交貨。
