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無縫(feng)鋼(gang)管(guan)(guan)(guan)重量(liang)計算公式 [(外徑-壁(bi)厚(hou))*壁(bi)厚(hou)]*0.02466=kg/米(mi)(每米(mi)的(de)重量(liang))合(he)金管(guan)(guan)(guan)尺寸及(ji)允許偏差 偏差等(deng)(deng)(deng)(deng)(deng)級(ji) 標(biao)(biao)準化外徑允許偏差 D1 ±1.5%，小±0.75 mm D2 ±1.0%。小±0.50 mm D3 ±0.75%．小±0.30 mm D4 ±0.50%。小±0.10 mm 合(he)金鋼(gang)材(cai)(cai)質中各元素及(ji)符號(hao)(hao)(hao)(hao)含義 鋼(gang)的(de)牌號(hao)(hao)(hao)(hao)簡稱鋼(gang)號(hao)(hao)(hao)(hao)，是對每一(yi)種具(ju)體鋼(gang)產品所取的(de)名(ming)稱，是人們了解鋼(gang)的(de)一(yi)種共同語言。 我(wo)國的(de)剛(gang)號(hao)(hao)(hao)(hao)表(biao)示方法一(yi)般(ban)采用(yong)(yong)(yong)(yong)(yong)漢語拼音字(zi)母、化學素符號(hao)(hao)(hao)(hao)和(he)(he)阿(a)拉(la)伯數字(zi)相結(jie)(jie)(jie)合(he)的(de)方法表(biao)示。無縫(feng)鋼(gang)管(guan)(guan)(guan)，因其用(yong)(yong)(yong)(yong)(yong)途(tu)不同而分為(wei)(wei)如下(xia)若干品種： GB/T8162-1999（結(jie)(jie)(jie)構用(yong)(yong)(yong)(yong)(yong)無縫(feng)鋼(gang)管(guan)(guan)(guan)）。主(zhu)(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)于(yu)一(yi)般(ban)結(jie)(jie)(jie)構和(he)(he)機械結(jie)(jie)(jie)構。其代(dai)表(biao)材(cai)(cai)質（牌號(hao)(hao)(hao)(hao)）：碳素鋼(gang)20、45號(hao)(hao)(hao)(hao)鋼(gang)；合(he)金鋼(gang)Q345、20Cr、40Cr、20CrMo、30-35CrMo、42CrMo等(deng)(deng)(deng)(deng)(deng)。 GB/T8163-1999（輸(shu)送(song)流(liu)(liu)(liu)體用(yong)(yong)(yong)(yong)(yong)無縫(feng)鋼(gang)管(guan)(guan)(guan)）。主(zhu)(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)于(yu)工(gong)程及(ji)大(da)型(xing)設備上輸(shu)送(song)流(liu)(liu)(liu)體管(guan)(guan)(guan)道。代(dai)表(biao)材(cai)(cai)質（牌號(hao)(hao)(hao)(hao)）為(wei)(wei)20、Q345等(deng)(deng)(deng)(deng)(deng)。 GB3087-1999（低(di)中壓(ya)(ya)(ya)鍋爐(lu)用(yong)(yong)(yong)(yong)(yong)無縫(feng)鋼(gang)管(guan)(guan)(guan)）。主(zhu)(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)于(yu)工(gong)業鍋爐(lu)及(ji)生(sheng)活鍋爐(lu)輸(shu)送(song)低(di)中壓(ya)(ya)(ya)流(liu)(liu)(liu)體的(de)管(guan)(guan)(guan)道。代(dai)表(biao)材(cai)(cai)質為(wei)(wei)10、20號(hao)(hao)(hao)(hao)鋼(gang)。 GB5310-1995（高壓(ya)(ya)(ya)鍋爐(lu)用(yong)(yong)(yong)(yong)(yong)無縫(feng)鋼(gang)管(guan)(guan)(guan)）。主(zhu)(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)于(yu)電站(zhan)及(ji)核電站(zhan)鍋爐(lu)上耐高溫、高壓(ya)(ya)(ya)的(de)輸(shu)送(song)流(liu)(liu)(liu)體集箱及(ji)管(guan)(guan)(guan)道。代(dai)表(biao)材(cai)(cai)質為(wei)(wei)20G、12Cr1MoVG、15CrMoG等(deng)(deng)(deng)(deng)(deng)。 GB5312-1999（船舶用(yong)(yong)(yong)(yong)(yong)碳鋼(gang)和(he)(he)碳錳(meng)鋼(gang)無縫(feng)鋼(gang)管(guan)(guan)(guan)）。主(zhu)(zhu)(zhu)要(yao)用(yong)(yong)(yong)(yong)(yong)于(yu)船舶鍋爐(lu)及(ji)過熱(re)器用(yong)(yong)(yong)(yong)(yong)I、II級(ji)耐壓(ya)(ya)(ya)管(guan)(guan)(guan)等(deng)(deng)(deng)(deng)(deng)。代(dai)表(biao)材(cai)(cai)質為(wei)(wei)360、410、460鋼(gang)級(ji)等(deng)(deng)(deng)(deng)(deng)。無縫(feng)鋼(gang)管(guan)(guan)(guan)制(zhi)作過程：熱(re)軋(擠(ji)壓(ya)(ya)(ya)無縫(feng)鋼(gang)管(guan)(guan)(guan)):圓(yuan)(yuan)管(guan)(guan)(guan)坯(pi)→加熱(re)→穿孔(kong)→三輥斜(xie)軋、連軋或(huo)(huo)擠(ji)壓(ya)(ya)(ya)→脫管(guan)(guan)(guan)→定(ding)徑(或(huo)(huo)減徑)→冷(leng)卻→坯(pi)管(guan)(guan)(guan)→矯(jiao)直→水(shui)(shui)壓(ya)(ya)(ya)試驗(或(huo)(huo)探(tan)傷)→標(biao)(biao)記→入庫(ku)。 冷(leng)拔(ba)(軋)無縫(feng)鋼(gang)管(guan)(guan)(guan):圓(yuan)(yuan)圓(yuan)(yuan)管(guan)(guan)(guan)坯(pi)→加熱(re)→穿孔(kong)→打頭→退(tui)火→酸洗(xi)→涂(tu)油(鍍銅)→多道次(ci)冷(leng)拔(ba)(冷(leng)軋)→坯(pi)管(guan)(guan)(guan)→熱(re)處理→矯(jiao)直→水(shui)(shui)壓(ya)(ya)(ya)試驗(探(tan)傷)→標(biao)(biao)記→入庫(ku)。 無縫(feng)鋼(gang)管(guan)(guan)(guan)具(ju)有(you)中空截面，大(da)量(liang)用(yong)(yong)(yong)(yong)(yong)作輸(shu)送(song)流(liu)(liu)(liu)體的(de)管(guan)(guan)(guan)道，如輸(shu)送(song)石(shi)油、天(tian)然氣、煤氣、水(shui)(shui)及(ji)某些(xie)固體物料(liao)的(de)管(guan)(guan)(guan)道等(deng)(deng)(deng)(deng)(deng)。鋼(gang)管(guan)(guan)(guan)廣泛(fan)用(yong)(yong)(yong)(yong)(yong)于(yu)制(zhi)造結(jie)(jie)(jie)構件(jian)和(he)(he)機械零件(jian)，如石(shi)油鉆(zhan)桿、汽車傳(chuan)動軸、自(zi)行車架以及(ji)建筑(zhu)施工(gong)中用(yong)(yong)(yong)(yong)(yong)的(de)鋼(gang)腳手架等(deng)(deng)(deng)(deng)(deng)用(yong)(yong)(yong)(yong)(yong)鋼(gang)管(guan)(guan)(guan)制(zhi)造環形零件(jian)，可提(ti)高材(cai)(cai)料(liao)利(li)用(yong)(yong)(yong)(yong)(yong)率，節約(yue)材(cai)(cai)料(liao)和(he)(he)加工(gong)工(gong)時，已(yi)廣泛(fan)用(yong)(yong)(yong)(yong)(yong)鋼(gang)管(guan)(guan)(guan)來(lai)制(zhi)造。