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大口徑厚壁無縫鋼管

據不完全統計，我國現(xian)有(you)無縫管(guan)(guan)(guan)(guan)(guan)(guan)(guan)生產(chan)企業約(yue)240多家，大(da)(da)口(kou)徑(jing)(jing)(jing)(jing)(jing)厚壁(bi)(bi)無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)機(ji)(ji)(ji)組約(yue)250多套，大(da)(da)口(kou)徑(jing)(jing)(jing)(jing)(jing)的厚壁(bi)(bi)無縫鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)主要(yao)是以(yi)它(ta)的鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的外部口(kou)徑(jing)(jing)(jing)(jing)(jing)來說的，一般(ban)外徑(jing)(jing)(jing)(jing)(jing)在325毫米(mi)以(yi)上的我們都(dou)稱為(wei)大(da)(da)口(kou)徑(jing)(jing)(jing)(jing)(jing)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)，厚壁(bi)(bi)呢，一般(ban)壁(bi)(bi)厚在20毫米(mi)以(yi)上的就可以(yi)了，　以(yi)下是鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的制造過(guo)程：鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的原(yuan)料是鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)料，管(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)要(yao)經(jing)(jing)(jing)過(guo)切(qie)割機(ji)(ji)(ji)的切(qie)割加工成(cheng)長度約(yue)為(wei)1米(mi)的坯(pi)料，并經(jing)(jing)(jing)傳送帶送到(dao)熔爐內加熱(re)。鋼(gang)(gang)(gang)(gang)坯(pi)被送入(ru)(ru)熔爐內加熱(re)，溫度大(da)(da)約(yue)為(wei)1200℃。燃料為(wei)氫氣或(huo)乙炔。爐內溫度控制是關鍵性的問(wen)題.圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)出爐后(hou)(hou)要(yao)經(jing)(jing)(jing)過(guo)壓(ya)力穿(chuan)孔(kong)機(ji)(ji)(ji)進(jin)行穿(chuan)空(kong)。一般(ban)較常見的穿(chuan)孔(kong)機(ji)(ji)(ji)是錐(zhui)形輥穿(chuan)孔(kong)機(ji)(ji)(ji)，這種(zhong)穿(chuan)孔(kong)機(ji)(ji)(ji)生產(chan)效率(lv)高，產(chan)品質量好，穿(chuan)孔(kong)擴徑(jing)(jing)(jing)(jing)(jing)量大(da)(da)，可穿(chuan)多種(zhong)鋼(gang)(gang)(gang)(gang)種(zhong)。穿(chuan)孔(kong)后(hou)(hou)，圓(yuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)就先(xian)后(hou)(hou)被三輥斜軋、連軋或(huo)擠壓(ya)。擠壓(ya)后(hou)(hou)要(yao)脫管(guan)(guan)(guan)(guan)(guan)(guan)(guan)定(ding)徑(jing)(jing)(jing)(jing)(jing)。定(ding)徑(jing)(jing)(jing)(jing)(jing)機(ji)(ji)(ji)通過(guo)錐(zhui)形鉆頭高速(su)旋轉入(ru)(ru)鋼(gang)(gang)(gang)(gang)胚打(da)孔(kong)，形成(cheng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)內徑(jing)(jing)(jing)(jing)(jing)由定(ding)徑(jing)(jing)(jing)(jing)(jing)機(ji)(ji)(ji)鉆頭的外徑(jing)(jing)(jing)(jing)(jing)長度來確定(ding)。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)經(jing)(jing)(jing)定(ding)徑(jing)(jing)(jing)(jing)(jing)后(hou)(hou)，進(jin)入(ru)(ru)冷卻(que)(que)(que)塔中(zhong)，通過(guo)噴(pen)水冷卻(que)(que)(que)，鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)經(jing)(jing)(jing)冷卻(que)(que)(que)后(hou)(hou)，就要(yao)被矯(jiao)直（其實(shi)現(xian)在很多的廠(chang)家已(yi)經(jing)(jing)(jing)不用再矯(jiao)直機(ji)(ji)(ji)矯(jiao)直了，而是在鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)通過(guo)軋機(ji)(ji)(ji)就直接(jie)達到(dao)了它(ta)的鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)本(ben)身的直度了）。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)經(jing)(jing)(jing)矯(jiao)直后(hou)(hou)由傳送帶送至金屬探(tan)(tan)傷機(ji)(ji)(ji)（或(huo)水壓(ya)實(shi)驗）進(jin)行內部探(tan)(tan)傷。若(ruo)鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)內部有(you)裂(lie)紋，氣泡等(deng)問(wen)題，將被探(tan)(tan)測出。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)質檢后(hou)(hou)還要(yao)通過(guo)嚴(yan)格的手(shou)工挑選（現(xian)在都(dou)有(you)激光探(tan)(tan)測檢驗）。鋼(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)質檢后(hou)(hou)，用油漆噴(pen)上編號(hao)、規(gui)格、生產(chan)批號(hao)等(deng)。并由吊車吊入(ru)(ru)倉庫(ku)中(zhong)。

　　無縫鋼(gang)管的規格用外徑(jing)*壁厚毫米數表示。

　　大口徑厚(hou)壁無縫鋼(gang)管(guan)(guan)國內(nei)制造廠(chang)(chang)(chang)家：成都(dou)無縫鋼(gang)管(guan)(guan)廠(chang)(chang)(chang)、鞍鋼(gang)、本鋼(gang)、衡陽鋼(gang)管(guan)(guan)廠(chang)(chang)(chang)、上海(hai)鋼(gang)管(guan)(guan)廠(chang)(chang)(chang)、天津市無縫鋼(gang)管(guan)(guan)廠(chang)(chang)(chang)、包鋼(gang)　大冶鋼(gang)廠(chang)(chang)(chang)等(deng)

大(da)口徑厚壁(bi)無縫鋼管的分類

　　無縫鋼管分熱(re)軋和熱(re)擴兩種

　　熱(re)軋(ya)無縫鋼(gang)(gang)(gang)(gang)管分一般(ban)鋼(gang)(gang)(gang)(gang)管，低、中(zhong)壓鍋爐(lu)鋼(gang)(gang)(gang)(gang)管，高(gao)壓鍋爐(lu)鋼(gang)(gang)(gang)(gang)管、合金鋼(gang)(gang)(gang)(gang)管、不(bu)銹鋼(gang)(gang)(gang)(gang)管、石油(you)裂化管、地質(zhi)鋼(gang)(gang)(gang)(gang)管和其它鋼(gang)(gang)(gang)(gang)管等。

　　冷(leng)軋(ya)（撥）無縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)除分一(yi)般(ban)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、低(di)中壓鍋爐鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、高(gao)壓鍋爐鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、合金(jin)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、不(bu)銹鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、石油裂(lie)化(hua)管(guan)(guan)(guan)(guan)、其(qi)它鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)外(wai)，還包括碳(tan)素薄(bo)壁(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、合金(jin)薄(bo)壁(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、不(bu)銹薄(bo)壁(bi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)、異型鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)。熱(re)軋(ya)無縫管(guan)(guan)(guan)(guan)外(wai)徑一(yi)般(ban)大于 32mm，壁(bi)厚2.5-75mm，冷(leng)軋(ya)無縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)處徑可以到6mm，壁(bi)厚可到0.25mm，薄(bo)壁(bi)管(guan)(guan)(guan)(guan)外(wai)徑可到5mm，壁(bi)厚小于0.25mm，冷(leng)軋(ya)比熱(re)軋(ya)尺寸精度高(gao)。

　　一般(ban)用無縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管：是用10#、20#、30#、35#、45#等(deng)優質碳結鋼(gang)(gang)(gang)(gang)(gang)(gang)16Mn、5MnV等(deng)低(di)(di)合(he)金結構鋼(gang)(gang)(gang)(gang)(gang)(gang)或40Cr、30CrMnSi、45Mn2、40MnB等(deng)合(he)金鋼(gang)(gang)(gang)(gang)(gang)(gang)熱(re)軋(ya)或冷軋(ya)制成(cheng)(cheng)的。10、20等(deng)低(di)(di)碳鋼(gang)(gang)(gang)(gang)(gang)(gang)制造的無縫(feng)(feng)管主要用于流(liu)體輸送管道。45#、40Cr等(deng)中碳鋼(gang)(gang)(gang)(gang)(gang)(gang)制成(cheng)(cheng)的無縫(feng)(feng)管用來(lai)制造機械(xie)零件，如(ru)汽(qi)車、拖(tuo)拉機的受力零件。一般(ban)用無縫(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)管要保證強度(du)和壓扁(bian)試驗。熱(re)軋(ya)鋼(gang)(gang)(gang)(gang)(gang)(gang)管以熱(re)軋(ya)狀(zhuang)態或熱(re)處(chu)理狀(zhuang)態交(jiao)貨；冷軋(ya)以熱(re)處(chu)理狀(zhuang)態交(jiao)貨。

　　低中壓(ya)鍋(guo)爐(lu)用無(wu)縫鋼(gang)管：用于制造各(ge)種低中壓(ya)鍋(guo)爐(lu)、過熱蒸(zheng)汽管、沸水管、水冷(leng)壁管及(ji)機車鍋(guo)爐(lu)用過熱蒸(zheng)汽管、大煙(yan)管、小煙(yan)管和拱(gong)磚(zhuan)管等。用優質碳素結(jie)構鋼(gang)熱軋或冷(leng)軋（撥）無(wu)縫鋼(gang)管。主要(yao)用10、20號鋼(gang)制造，除保(bao)證化學(xue)成分和機械性能外要(yao)做水壓(ya)試驗，卷(juan)邊、擴口、壓(ya)扁等試驗。熱軋以(yi)熱軋狀態交(jiao)貨、冷(leng)軋（撥）以(yi)熱處理狀態交(jiao)貨。

　　高壓(ya)鍋爐(lu)鋼(gang)管(guan)：主(zhu)要(yao)用(yong)(yong)來制造高壓(ya)及其以上壓(ya)力的(de)蒸汽鍋爐(lu)管(guan)道等(deng)用(yong)(yong)的(de)優質(zhi)碳素結構(gou)鋼(gang)、合金結構(gou)鋼(gang)和(he)(he)不銹耐熱(re)鋼(gang)無縫(feng)鋼(gang)管(guan)、這些鍋爐(lu)管(guan)經常處(chu)于高溫(wen)和(he)(he)高壓(ya)下(xia)工(gong)作(zuo)(zuo)、管(guan)子(zi)在高溫(wen)煙氣和(he)(he)水(shui)蒸汽的(de)作(zuo)(zuo)用(yong)(yong)下(xia)還會發生(sheng)氧(yang)化(hua)和(he)(he)腐蝕，因此(ci)要(yao)求(qiu)鋼(gang)管(guan)有高的(de)持久強度、高的(de)抗氧(yang)化(hua)性能，并具有良好的(de)組織(zhi)(zhi)穩定性，采用(yong)(yong)鋼(gang)號(hao)(hao)有：優質(zhi)碳素結構(gou)鋼(gang)鋼(gang)號(hao)(hao)有20G、20MnG、25MnG；合金結構(gou)鋼(gang)鋼(gang)號(hao)(hao)15MoG、20MoG、12CrMoG、15CrMoG、12Cr2MoG、12CrMoVG、12Cr3MoVSiTiB等(deng)；有銹耐熱(re)鋼(gang)常用(yong)(yong)1Cr18Ni9、1Cr18Ni11Nb高壓(ya)鍋爐(lu)管(guan)除保(bao)證化(hua)學成(cheng)分(fen)和(he)(he)機械性能外，要(yao)逐根做水(shui)壓(ya)試驗(yan)，要(yao)作(zuo)(zuo)擴口、壓(ya)扁試驗(yan)。鋼(gang)管(guan)以熱(re)處(chu)理狀態交貨。此(ci)外，對成(cheng)品鋼(gang)管(guan)顯微組織(zhi)(zhi)、晶(jing)粒度、脫碳層(ceng)也有一定要(yao)求(qiu)。

　　地質(zhi)鉆(zhan)探(tan)及石(shi)油鉆(zhan)探(tan)用(yong)(yong)無(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)：為探(tan)明(ming)地下(xia)巖(yan)層(ceng)結(jie)構、地下(xia)水(shui)、石(shi)油、天然氣(qi)及礦產資源情況，利(li)用(yong)(yong)鉆(zhan)機打(da)井(jing)。石(shi)油、天然氣(qi)開采(cai)更離不(bu)開打(da)井(jing)，地質(zhi)鉆(zhan)探(tan)用(yong)(yong)石(shi)油鉆(zhan)探(tan)用(yong)(yong)無(wu)縫(feng)鋼(gang)(gang)(gang)管(guan)(guan)是(shi)鉆(zhan)井(jing)的(de)(de)主要器材，主要包括巖(yan)芯外(wai)管(guan)(guan)、巖(yan)芯內管(guan)(guan)、套管(guan)(guan)、鉆(zhan)桿(gan)等。由于鉆(zhan)探(tan)用(yong)(yong)管(guan)(guan)要深入到幾(ji)千米地層(ceng)深度(du)工作(zuo)(zuo)(zuo)，工作(zuo)(zuo)(zuo)條(tiao)件極為復雜，鉆(zhan)桿(gan)承受拉(la)、壓、彎曲(qu)、扭轉和不(bu)均衡沖擊載荷等應力作(zuo)(zuo)(zuo)用(yong)(yong)，還要受到泥漿、巖(yan)石(shi)磨損，因此，要求(qiu)管(guan)(guan)材必須具(ju)有足夠(gou)的(de)(de)強(qiang)度(du)、硬度(du)、耐磨性和沖擊韌性，鋼(gang)(gang)(gang)管(guan)(guan)用(yong)(yong)鋼(gang)(gang)(gang)用(yong)(yong)“DZ”（地質(zhi)的(de)(de)漢語拼音字(zi)頭(tou)）加數字(zi)一代表鋼(gang)(gang)(gang)屈服點表示(shi)，常用(yong)(yong)的(de)(de)鋼(gang)(gang)(gang)號(hao)有DZ45的(de)(de)45MnB、50Mn；DZ50的(de)(de)40Mn2、40Mn2Si；DZ55的(de)(de)40Mn2Mo、40MnVB；DZ60的(de)(de)40MnMoB、DZ65的(de)(de)27MnMoVB。鋼(gang)(gang)(gang)管(guan)(guan)都(dou)以熱處(chu)理狀態交貨。

　　石油(you)裂(lie)化管：用(yong)(yong)于石油(you)煉廠的爐管、熱交(jiao)換器管和管道用(yong)(yong)無縫(feng)管。常用(yong)(yong)優質碳素鋼（10#、20#）、合金(jin)鋼（12CrMo、15CrMo）、耐熱鋼（12Cr2Mo、15Cr5Mo）、不銹鋼（1Cr18Ni9、1Cr18Ni9Ti）

  

大口徑厚壁無縫鋼管

制造。鋼(gang)(gang)(gang)管(guan)(guan)除(chu)得證(zheng)化學成(cheng)分和各(ge)種(zhong)機械(xie)性能外，還要保證(zheng)水壓(ya)、壓(ya)扁、擴口等(deng)試驗(yan)(yan)，及表面(mian)質量和無(wu)損檢驗(yan)(yan)。鋼(gang)(gang)(gang)管(guan)(guan)在熱(re)處理(li)狀態下交(jiao)貨。不銹(xiu)(xiu)鋼(gang)(gang)(gang)管(guan)(guan)：用(yong)各(ge)種(zhong)不銹(xiu)(xiu)鋼(gang)(gang)(gang)熱(re)軋，冷軋的(de)不銹(xiu)(xiu)鋼(gang)(gang)(gang)管(guan)(guan)，廣泛(fan)應用(yong)于石油、化工設備管(guan)(guan)道和各(ge)種(zhong)用(yong)途(tu)的(de)不銹(xiu)(xiu)鋼(gang)(gang)(gang)結構零件，除(chu)應保證(zheng)化學成(cheng)分和機械(xie)性能，凡用(yong)作承(cheng)受流體壓(ya)力的(de)鋼(gang)(gang)(gang)管(guan)(guan)要保證(zheng)水壓(ya)試驗(yan)(yan)合格。各(ge)種(zhong)專用(yong)鋼(gang)(gang)(gang)管(guan)(guan)要按規(gui)定(ding)保證(zheng)條件。

大口徑厚壁無縫鋼管執行標準

　　1、一般(ban)結(jie)構用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB8162-2008 2、輸送流體用(yong)(yong)地縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB8163-20083、鍋(guo)(guo)爐(lu)(lu)用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB3087-2008 4、鍋(guo)(guo)爐(lu)(lu)用(yong)(yong)高(gao)壓(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)：GB5310-2008（ST45.8-Ⅲ型） 5、化肥設備用(yong)(yong)高(gao)壓(ya)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB6479-1999 6、地質鉆探用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：YB235-70 7、石油鉆探用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：YB528-65 8、石油裂(lie)化用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB9948-88 9、石油鉆鋌專用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)：YB691-70 10、汽車半軸用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB3088-1999 11、船(chuan)舶用(yong)(yong)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB5312-1999 12、冷(leng)拔(ba)冷(leng)軋精密無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)管(guan)(guan)(guan)：GB3639-1999 13、各種合金(jin)管(guan)(guan)(guan)16Mn、27SiMn、15CrMo、35CrMo、12CrMov、20G、40Cr,12Cr1MoV,15CrMo　

　　另外，還有GB/T17396-1998（液(ye)壓支(zhi)柱用熱軋無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB3093-1986（柴(chai)油機用高壓無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB/T3639-1983（冷(leng)拔(ba)或冷(leng)軋精密無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB/T3094-1986（冷(leng)拔(ba)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)異形鋼(gang)(gang)管(guan)(guan)）、GB/T8713-1988（液(ye)壓和氣(qi)動筒用精密內徑無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB13296-1991（鍋爐、熱交換器(qi)用不(bu)(bu)銹(xiu)鋼(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB/T14975-1994（結構用不(bu)(bu)銹(xiu)鋼(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、GB/T14976-1994（流體輸送用不(bu)(bu)銹(xiu)鋼(gang)(gang)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）GB/T5035-1993（汽車(che)半軸套(tao)管(guan)(guan)用無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)）、API SPEC5CT-1999（套(tao)管(guan)(guan)和油管(guan)(guan)規(gui)范）等。

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