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1.外(wai)觀上,無(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)和焊(han)(han)(han)接(jie)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)區別在(zai)焊(han)(han)(han)管(guan)(guan)(guan)內壁有(you)焊(han)(han)(han)筋,而無(wu)(wu)(wu)縫(feng)的(de)(de)沒(mei)有(you)。2.無(wu)(wu)(wu)縫(feng)管(guan)(guan)(guan)壓(ya)力(li)(li)更高,焊(han)(han)(han)管(guan)(guan)(guan)一(yi)般在(zai)10個左右MPa,現(xian)在(zai)焊(han)(han)(han)管(guan)(guan)(guan)有(you)做無(wu)(wu)(wu)縫(feng)化處(chu)理的(de)(de)。3.無(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)是在(zai)軋制中一(yi)次成型的(de)(de)。焊(han)(han)(han)接(jie)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)需(xu)要(yao)卷制后焊(han)(han)(han)接(jie)而成,一(yi)般有(you)螺(luo)旋焊(han)(han)(han)和直(zhi)焊(han)(han)(han)。性能(neng)無(wu)(wu)(wu)縫(feng)管(guan)(guan)(guan)要(yao)好(hao)一(yi)些(xie),當然價也(ye)高一(yi)些(xie)。鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)是一(yi)種中空的(de)(de)長條鋼(gang)(gang)(gang)(gang)(gang)(gang)材,大量用(yong)作輸送流(liu)體(ti)的(de)(de)管(guan)(guan)(guan)道,如石油、天燃(ran)氣、水、煤(mei)氣、蒸氣等(deng),另外(wai),在(zai)搞彎(wan)、抗扭強度相同時,重量較輕,所(suo)以(yi)也(ye)廣(guang)泛用(yong)于制造機械零件和工程結構。也(ye)常用(yong)作生產各(ge)種常規武器、槍管(guan)(guan)(guan)、炮彈等(deng)。無(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)的(de)(de)分類:鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)分無(wu)(wu)(wu)縫(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)和焊(han)(han)(han)接(jie)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(有(you)縫(feng)管(guan)(guan)(guan))兩大類。按斷面形(xing)(xing)(xing)狀又可分為圓管(guan)(guan)(guan)和異(yi)(yi)形(xing)(xing)(xing)管(guan)(guan)(guan),廣(guang)泛應用(yong)的(de)(de)是圓形(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan),但也(ye)有(you)一(yi)些(xie)方形(xing)(xing)(xing)、矩形(xing)(xing)(xing)、半圓形(xing)(xing)(xing)、六角(jiao)(jiao)形(xing)(xing)(xing)、等(deng)邊(bian)三角(jiao)(jiao)形(xing)(xing)(xing)、八角(jiao)(jiao)形(xing)(xing)(xing)等(deng)異(yi)(yi)形(xing)(xing)(xing)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)。對于承受流(liu)體(ti)壓(ya)力(li)(li)的(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)都(dou)要(yao)進行(xing)液壓(ya)試(shi)(shi)驗(yan)來(lai)檢驗(yan)其耐壓(ya)能(neng)力(li)(li)和質量,在(zai)規定的(de)(de)壓(ya)力(li)(li)下不發生泄漏(lou)、浸(jin)濕或膨脹為合格,有(you)些(xie)鋼(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)還(huan)要(yao)根據標準(zhun)或需(xu)方要(yao)求進行(xing)卷邊(bian)試(shi)(shi)驗(yan)、擴口(kou)試(shi)(shi)驗(yan)、壓(ya)扁試(shi)(shi)驗(yan)等(deng)。