邯鄲市中樞貿易有限公司
中(zhong)樞管道1號倉——八大品牌
聯塑地(di)(di)暖(nuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)結構特點及(ji)技(ji)術要(yao)(yao)求(qiu)(qiu)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)類零(ling)(ling)件是機器(qi)中經(jing)常遇(yu)到的(de)(de)典型零(ling)(ling)件之。它主要(yao)(yao)用(yong)來支承(cheng)傳動(dong)零(ling)(ling)部(bu)件，軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)類零(ling)(ling)件是旋轉體零(ling)(ling)件，其長(chang)度(du)大于(yu)L450NS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)徑(jing)，一般(ban)由同心軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)的(de)(de)外(wai)圓(yuan)(yuan)柱面(mian)(mian)，圓(yuan)(yuan)錐面(mian)(mian)，內(nei)孔和(he)(he)螺紋及(ji)相(xiang)應(ying)的(de)(de)端面(mian)(mian)所組成。根據結構形狀的(de)(de)不(bu)同，軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)類零(ling)(ling)件可(ke)分為(wei)光軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)，階梯軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)，空心軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)和(he)(he)曲(qu)(qu)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)等(deng)。軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)的(de)(de)長(chang)徑(jing)比小于(yu)的(de)(de)稱(cheng)為(wei)短軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)大于(yu)的(de)(de)稱(cheng)為(wei)細(xi)長(chang)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)，大多數軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)介于(yu)兩(liang)者之間(jian)。軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)用(yong)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)承(cheng)支承(cheng)，聯塑地(di)(di)暖(nuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)與軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)承(cheng)配(pei)合的(de)(de)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)段(duan)稱(cheng)為(wei)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)頸。軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)頸是軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)的(de)(de)裝配(pei)基準，它們的(de)(de)精度(du)和(he)(he)表面(mian)(mian)質量般(ban)要(yao)(yao)求(qiu)(qiu)較(jiao)高(gao)，其技(ji)術要(yao)(yao)求(qiu)(qiu)般(ban)根據軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)的(de)(de)主要(yao)(yao)功用(yong)和(he)(he)工(gong)作條件制(zhi)定，管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)具(ju)有(you)中空截(jie)面(mian)(mian)大量用(yong)作輸送流體的(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道，如(ru)(ru)輸送石(shi)油(you)，天然氣，煤氣，水及(ji)某些固體物料的(de)(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道等(deng)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)與圓(yuan)(yuan)等(deng)實(shi)心材(cai)(cai)相(xiang)比，在抗彎抗扭強度(du)相(xiang)同時，專業LNS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，LNS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，LNS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，LNS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，LNS管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線怎樣(yang)購買使用(yong)時間(jian)長(chang)的(de)(de)X100管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)線管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)技(ji)術先進，檢測嚴格(ge)。廣泛用(yong)于(yu)制(zhi)造結構件和(he)(he)機械零(ling)(ling)件，如(ru)(ru)石(shi)油(you)鉆桿，汽車傳動(dong)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)，自行車架以(yi)(yi)及(ji)建筑(zhu)施工(gong)中用(yong)的(de)(de)腳手架等(deng)。用(yong)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)制(zhi)造環(huan)(huan)形零(ling)(ling)件，可(ke)提高(gao)材(cai)(cai)料利用(yong)率(lv)簡(jian)化制(zhi)造工(gong)序，如(ru)(ru)滾(gun)動(dong)軸(zhou)(zhou)(zhou)(zhou)(zhou)(zhou)承(cheng)套圈(quan)，千斤頂(ding)套等(deng)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)還是各種常規(gui)不(bu)可(ke)缺少的(de)(de)材(cai)(cai)料節約材(cai)(cai)料和(he)(he)加工(gong)工(gong)時，管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，筒等(deng)都要(yao)(yao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)來制(zhi)造。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按橫截(jie)面(mian)(mian)積形狀的(de)(de)不(bu)同可(ke)分為(wei)圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)異型管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。由於在周長(chang)相(xiang)等(deng)的(de)(de)條件下(xia)，圓(yuan)(yuan)面(mian)(mian)積大，用(yong)圓(yuan)(yuan)形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)可(ke)以(yi)(yi)輸送更多的(de)(de)流體。此外(wai)，圓(yuan)(yuan)環(huan)(huan)截(jie)面(mian)(mian)在承(cheng)受內(nei)部(bu)或(huo)外(wai)部(bu)徑(jing)向壓力(li)時，受力(li)較(jiao)均勻，因此，，圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)也有(you)定的(de)(de)局限性；，如(ru)(ru)在受平面(mian)(mian)彎曲(qu)(qu)的(de)(de)條件下(xia)，圓(yuan)(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)不(bu)如(ru)(ru)方，矩形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)抗彎強度(du)大，些農(nong)機具(ju)骨架，木(mu)家具(ju)等(deng)就(jiu)常用(yong)方，矩形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。
矩管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)性(xing)能指數(shu)分(fen)析(xi)，在(zai)滿足工(gong)程設計要求的(de)(de)(de)(de)(de)(de)(de)同時(shi)，卻往往容易(yi)形(xing)成(cheng)選用(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)件(jian)總體上(shang)(shang)出現(xian)(xian)少量(liang)多品(pin)種(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)結果，從而(er)不利于(yu)現(xian)(xian)場施工(gong)材料(liao)的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)理，調(diao)控以及(ji)設計變(bian)更需(xu)要的(de)(de)(de)(de)(de)(de)(de)材料(liao)代(dai)用(yong)(yong)(yong)(yong)等。因(yin)此，管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)選用(yong)(yong)(yong)(yong)，應(ying)綜合安(an)全性(xing)和(he)經濟性(xing)，盡可能減(jian)少管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)品(pin)種(zhong)(zhong)為宜(yi)。此外現(xian)(xian)場施工(gong)的(de)(de)(de)(de)(de)(de)(de)條件(jian)，施工(gong)的(de)(de)(de)(de)(de)(de)(de)水平(ping)，管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)採購(gou)周期等因(yin)素，也(ye)應(ying)在(zai)管(guan)(guan)(guan)(guan)件(jian)選用(yong)(yong)(yong)(yong)中引！必要的(de)(de)(de)(de)(de)(de)(de)重視。具體情(qing)況下(xia)，也(ye)應(ying)考慮采(cai)用(yong)(yong)(yong)(yong)加(jia)強管(guan)(guan)(guan)(guan)接頭，斜接彎(wan)管(guan)(guan)(guan)(guan)以及(ji)管(guan)(guan)(guan)(guan)子的(de)(de)(de)(de)(de)(de)(de)現(xian)(xian)場彎(wan)曲加(jia)工(gong)等的(de)(de)(de)(de)(de)(de)(de)可能性(xing)。實(shi)心管(guan)(guan)(guan)(guan)坯(pi)經檢(jian)查并清除表(biao)(biao)面(mian)(mian)缺(que)陷，截(jie)成(cheng)所需(xu)長(chang)度(du)，然后(hou)(hou)送往加(jia)熱(re)爐(lu)加(jia)熱(re)，在(zai)穿孔(kong)機(ji)(ji)上(shang)(shang)穿孔(kong)。在(zai)穿孔(kong)同時(shi)不斷旋轉和(he)前進，在(zai)軋(ya)(ya)輥(gun)和(he)頂頭的(de)(de)(de)(de)(de)(de)(de)作用(yong)(yong)(yong)(yong)下(xia)，管(guan)(guan)(guan)(guan)坯(pi)內(nei)部(bu)(bu)：逐漸形(xing)成(cheng)空腔，稱毛管(guan)(guan)(guan)(guan)。再(zai)送至自動(dong)軋(ya)(ya)管(guan)(guan)(guan)(guan)機(ji)(ji)上(shang)(shang)繼續軋(ya)(ya)制。后(hou)(hou)經均整(zheng)機(ji)(ji)均整(zheng)壁(bi)(bi)(bi)厚，達到(dao)規格(ge)要求。利用(yong)(yong)(yong)(yong)連續式(shi)軋(ya)(ya)管(guan)(guan)(guan)(guan)機(ji)(ji)組(zu)生(sheng)產(chan)(chan)(chan)(chan)(chan)熱(re)軋(ya)(ya)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)是較(jiao)先進的(de)(de)(de)(de)(de)(de)(de)。目的(de)(de)(de)(de)(de)(de)(de)：提(ti)高(gao)(gao)鋼件(jian)表(biao)(biao)面(mian)(mian)硬度(du)，耐磨性(xing)及(ji)疲勞(lao)強度(du)，心部(bu)(bu)保持韌性(xing)狀態。看外表(biao)(biao)有無麻(ma)面(mian)(mian)：麻(ma)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)發生(sheng)是由于(yu)軋(ya)(ya)槽(cao)的(de)(de)(de)(de)(de)(de)(de)磨損嚴(yan)峻，而(er)且鋼材的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)米(mi)娜(na)不槼則而(er)出現(xian)(xian)的(de)(de)(de)(de)(de)(de)(de)高(gao)(gao)低不平(ping)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)象。小(xiao)型(xing)(xing)件(jian)宜(yi)采(cai)用(yong)(yong)(yong)(yong)調(diao)質(zhi)處理，大型(xing)(xing)件(jian)宜(yi)采(cai)用(yong)(yong)(yong)(yong)正(zheng)火處理，主要用(yong)(yong)(yong)(yong)于(yu)制造強度(du)高(gao)(gao)的(de)(de)(de)(de)(de)(de)(de)運動(dong)件(jian)，如(ru)透平(ping)機(ji)(ji)葉輪，壓縮機(ji)(ji)活塞。軸(zhou)，齒輪，齒條，蝸桿等。節約機(ji)(ji)械(xie)加(jia)工(gong)工(gong)時(shi)，提(ti)高(gao)(gao)材料(liao)利用(yong)(yong)(yong)(yong)率，同時(shi)有利于(yu)提(ti)高(gao)(gao)產(chan)(chan)(chan)(chan)(chan)品(pin)質(zhi)量(liang)。h偽劣材表(biao)(biao)面(mian)(mian)易(yi)產(chan)(chan)(chan)(chan)(chan)生(sheng)裂(lie)紋(wen)，原(yuan)因(yin)是它的(de)(de)(de)(de)(de)(de)(de)坯(pi)：料(liao)是土坯(pi)，土坯(pi)氣(qi)孔(kong)多，土坯(pi)在(zai)冷卻的(de)(de)(de)(de)(de)(de)(de)過(guo)程中由于(yu)受到(dao)熱(re)應(ying)力的(de)(de)(de)(de)(de)(de)(de)作用(yong)(yong)(yong)(yong)，產(chan)(chan)(chan)(chan)(chan)生(sheng)裂(lie)痕，經過(guo)軋(ya)(ya)制后(hou)(hou)就有裂(lie)紋(wen)。大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)：大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)般包(bao)括熱(re)軋(ya)(ya)，熱(re)卷(juan)，澆(jiao)鑄等生(sheng)產(chan)(chan)(chan)(chan)(chan)方式(shi)!大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)多見于(yu)雙面(mian)(mian)埋(mai)弧焊生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)，產(chan)(chan)(chan)(chan)(chan)品(pin)經折彎(wan)，郃縫，內(nei)焊，外焊，矯直，平(ping)頭等多道工(gong)序，達到(dao)美國石(shi)油學會標準(zhun)要求。
矩管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)性(xing)能指數(shu)分(fen)析(xi)，在(zai)滿足工(gong)程設計要求的(de)(de)(de)(de)(de)(de)(de)同時(shi)，卻往往容易(yi)形(xing)成(cheng)選用(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)件(jian)總體上(shang)(shang)出現(xian)(xian)少量(liang)多品(pin)種(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)結果，從而(er)不利于(yu)現(xian)(xian)場施工(gong)材料(liao)的(de)(de)(de)(de)(de)(de)(de)管(guan)(guan)(guan)(guan)理，調(diao)控以及(ji)設計變(bian)更需(xu)要的(de)(de)(de)(de)(de)(de)(de)材料(liao)代(dai)用(yong)(yong)(yong)(yong)等。因(yin)此，管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)選用(yong)(yong)(yong)(yong)，應(ying)綜合安(an)全性(xing)和(he)經濟性(xing)，盡可能減(jian)少管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)品(pin)種(zhong)(zhong)為宜(yi)。此外現(xian)(xian)場施工(gong)的(de)(de)(de)(de)(de)(de)(de)條件(jian)，施工(gong)的(de)(de)(de)(de)(de)(de)(de)水平(ping)，管(guan)(guan)(guan)(guan)件(jian)的(de)(de)(de)(de)(de)(de)(de)採購(gou)周期等因(yin)素，也(ye)應(ying)在(zai)管(guan)(guan)(guan)(guan)件(jian)選用(yong)(yong)(yong)(yong)中引！必要的(de)(de)(de)(de)(de)(de)(de)重視。具體情(qing)況下(xia)，也(ye)應(ying)考慮采(cai)用(yong)(yong)(yong)(yong)加(jia)強管(guan)(guan)(guan)(guan)接頭，斜接彎(wan)管(guan)(guan)(guan)(guan)以及(ji)管(guan)(guan)(guan)(guan)子的(de)(de)(de)(de)(de)(de)(de)現(xian)(xian)場彎(wan)曲加(jia)工(gong)等的(de)(de)(de)(de)(de)(de)(de)可能性(xing)。實(shi)心管(guan)(guan)(guan)(guan)坯(pi)經檢(jian)查并清除表(biao)(biao)面(mian)(mian)缺(que)陷，截(jie)成(cheng)所需(xu)長(chang)度(du)，然后(hou)(hou)送往加(jia)熱(re)爐(lu)加(jia)熱(re)，在(zai)穿孔(kong)機(ji)(ji)上(shang)(shang)穿孔(kong)。在(zai)穿孔(kong)同時(shi)不斷旋轉和(he)前進，在(zai)軋(ya)(ya)輥(gun)和(he)頂頭的(de)(de)(de)(de)(de)(de)(de)作用(yong)(yong)(yong)(yong)下(xia)，管(guan)(guan)(guan)(guan)坯(pi)內(nei)部(bu)(bu)：逐漸形(xing)成(cheng)空腔，稱毛管(guan)(guan)(guan)(guan)。再(zai)送至自動(dong)軋(ya)(ya)管(guan)(guan)(guan)(guan)機(ji)(ji)上(shang)(shang)繼續軋(ya)(ya)制。后(hou)(hou)經均整(zheng)機(ji)(ji)均整(zheng)壁(bi)(bi)(bi)厚，達到(dao)規格(ge)要求。利用(yong)(yong)(yong)(yong)連續式(shi)軋(ya)(ya)管(guan)(guan)(guan)(guan)機(ji)(ji)組(zu)生(sheng)產(chan)(chan)(chan)(chan)(chan)熱(re)軋(ya)(ya)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)是較(jiao)先進的(de)(de)(de)(de)(de)(de)(de)。目的(de)(de)(de)(de)(de)(de)(de)：提(ti)高(gao)(gao)鋼件(jian)表(biao)(biao)面(mian)(mian)硬度(du)，耐磨性(xing)及(ji)疲勞(lao)強度(du)，心部(bu)(bu)保持韌性(xing)狀態。看外表(biao)(biao)有無麻(ma)面(mian)(mian)：麻(ma)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)發生(sheng)是由于(yu)軋(ya)(ya)槽(cao)的(de)(de)(de)(de)(de)(de)(de)磨損嚴(yan)峻，而(er)且鋼材的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)米(mi)娜(na)不槼則而(er)出現(xian)(xian)的(de)(de)(de)(de)(de)(de)(de)高(gao)(gao)低不平(ping)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)象。小(xiao)型(xing)(xing)件(jian)宜(yi)采(cai)用(yong)(yong)(yong)(yong)調(diao)質(zhi)處理，大型(xing)(xing)件(jian)宜(yi)采(cai)用(yong)(yong)(yong)(yong)正(zheng)火處理，主要用(yong)(yong)(yong)(yong)于(yu)制造強度(du)高(gao)(gao)的(de)(de)(de)(de)(de)(de)(de)運動(dong)件(jian)，如(ru)透平(ping)機(ji)(ji)葉輪，壓縮機(ji)(ji)活塞。軸(zhou)，齒輪，齒條，蝸桿等。節約機(ji)(ji)械(xie)加(jia)工(gong)工(gong)時(shi)，提(ti)高(gao)(gao)材料(liao)利用(yong)(yong)(yong)(yong)率，同時(shi)有利于(yu)提(ti)高(gao)(gao)產(chan)(chan)(chan)(chan)(chan)品(pin)質(zhi)量(liang)。h偽劣材表(biao)(biao)面(mian)(mian)易(yi)產(chan)(chan)(chan)(chan)(chan)生(sheng)裂(lie)紋(wen)，原(yuan)因(yin)是它的(de)(de)(de)(de)(de)(de)(de)坯(pi)：料(liao)是土坯(pi)，土坯(pi)氣(qi)孔(kong)多，土坯(pi)在(zai)冷卻的(de)(de)(de)(de)(de)(de)(de)過(guo)程中由于(yu)受到(dao)熱(re)應(ying)力的(de)(de)(de)(de)(de)(de)(de)作用(yong)(yong)(yong)(yong)，產(chan)(chan)(chan)(chan)(chan)生(sheng)裂(lie)痕，經過(guo)軋(ya)(ya)制后(hou)(hou)就有裂(lie)紋(wen)。大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)：大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)般包(bao)括熱(re)軋(ya)(ya)，熱(re)卷(juan)，澆(jiao)鑄等生(sheng)產(chan)(chan)(chan)(chan)(chan)方式(shi)!大口(kou)徑(jing)(jing)厚壁(bi)(bi)(bi)LNS管(guan)(guan)(guan)(guan)線(xian)管(guan)(guan)(guan)(guan)多見于(yu)雙面(mian)(mian)埋(mai)弧焊生(sheng)產(chan)(chan)(chan)(chan)(chan)工(gong)藝(yi)，產(chan)(chan)(chan)(chan)(chan)品(pin)經折彎(wan)，郃縫，內(nei)焊，外焊，矯直，平(ping)頭等多道工(gong)序，達到(dao)美國石(shi)油學會標準(zhun)要求。
