精密無縫鋼管的分類：精密無縫鋼管分精密無縫鋼管和(he)焊(han)接(jie)精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)(有縫(feng)(feng)管(guan))兩(liang)大(da)類。按斷面形(xing)(xing)狀又可分為圓(yuan)管(guan)和(he)異形(xing)(xing)管(guan)，廣泛(fan)應用的(de)(de)是圓(yuan)形(xing)(xing)精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)，但也有一些方形(xing)(xing)、矩形(xing)(xing)、半圓(yuan)形(xing)(xing)、六角(jiao)形(xing)(xing)、等(deng)(deng)邊三角(jiao)形(xing)(xing)、八角(jiao)形(xing)(xing)等(deng)(deng)異形(xing)(xing)精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)。對于承受流體壓(ya)(ya)力(li)的(de)(de)精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)都(dou)要(yao)進行(xing)液壓(ya)(ya)試(shi)驗來(lai)檢驗其耐(nai)壓(ya)(ya)能力(li)和(he)質(zhi)量，在規定(ding)的(de)(de)壓(ya)(ya)力(li)下(xia)不發生泄漏、浸濕或膨(peng)脹為合格，有些精(jing)密(mi)無(wu)縫(feng)(feng)鋼(gang)管(guan)還要(yao)根據標準(zhun)或需方要(yao)求進行(xing)卷(juan)邊試(shi)驗、擴口試(shi)驗、壓(ya)(ya)扁試(shi)驗等(deng)(deng)。
第二(er)，精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)是(shi)用(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)錠或實心(xin)管(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)經穿孔制(zhi)(zhi)成毛(mao)管(guan)(guan)(guan)(guan)(guan)(guan)，然后(hou)經熱軋(ya)、冷(leng)軋(ya)或冷(leng)撥(bo)制(zhi)(zhi)成。精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)的(de)規格用(yong)(yong)外徑(jing)(jing)*壁(bi)(bi)(bi)厚(hou)毫米數表示。精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)分(fen)熱軋(ya)和冷(leng)軋(ya)(撥(bo))精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)兩類。熱軋(ya)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)分(fen)一(yi)(yi)般精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)，低、中壓(ya)鍋爐(lu)(lu)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)，高(gao)壓(ya)鍋爐(lu)(lu)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、石油(you)裂化管(guan)(guan)(guan)(guan)(guan)(guan)、地質精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)和其它精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)等(deng)。冷(leng)軋(ya)(撥(bo))精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)除(chu)分(fen)一(yi)(yi)般精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、低中壓(ya)鍋爐(lu)(lu)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、高(gao)壓(ya)鍋爐(lu)(lu)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、石油(you)裂化管(guan)(guan)(guan)(guan)(guan)(guan)、其它精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)外，還包括碳素薄(bo)壁(bi)(bi)(bi)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、合金薄(bo)壁(bi)(bi)(bi)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、不銹薄(bo)壁(bi)(bi)(bi)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)、異型(xing)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)。熱軋(ya)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)一(yi)(yi)般大于32mm，壁(bi)(bi)(bi)厚(hou)2.5-75mm，冷(leng)軋(ya)精(jing)(jing)密(mi)(mi)(mi)(mi)無(wu)(wu)(wu)(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)處(chu)徑(jing)(jing)可以(yi)到6mm，壁(bi)(bi)(bi)厚(hou)可到0.25mm，薄(bo)壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)可到5mm壁(bi)(bi)(bi)厚(hou)小(xiao)于0.25mm，冷(leng)軋(ya)比熱軋(ya)尺寸(cun)精(jing)(jing)度高(gao)。
第三，一般用精密無縫鋼管是(shi)用10、20、30、35、45等(deng)優(you)質碳結(jie)(jie)(jie)鋼(gang)16Mn、5MnV等(deng)低合(he)金結(jie)(jie)(jie)構鋼(gang)或40Cr、30CrMnSi、45Mn2、40MnB等(deng)合(he)結(jie)(jie)(jie)鋼(gang)熱(re)(re)(re)軋(ya)(ya)或冷(leng)軋(ya)(ya)制(zhi)成的(de)。10、20等(deng)低碳鋼(gang)制(zhi)造的(de)無(wu)(wu)縫管(guan)主要(yao)用于(yu)流(liu)體輸送管(guan)道。45、40Cr等(deng)中碳鋼(gang)制(zhi)成的(de)無(wu)(wu)縫管(guan)用來制(zhi)造機(ji)(ji)械零(ling)件(jian)，如汽車、拖拉(la)機(ji)(ji)的(de)受力(li)零(ling)件(jian)。一(yi)般用精(jing)(jing)密無(wu)(wu)縫鋼(gang)管(guan)要(yao)保證強度和壓扁試驗。熱(re)(re)(re)軋(ya)(ya)精(jing)(jing)密無(wu)(wu)縫鋼(gang)管(guan)以(yi)熱(re)(re)(re)軋(ya)(ya)狀態(tai)或熱(re)(re)(re)處理狀態(tai)交貨;冷(leng)軋(ya)(ya)以(yi)熱(re)(re)(re)以(yi)熱(re)(re)(re)處理狀態(tai)交貨。
