<廣東>鵬鑫鋼鐵
廣東酸洗鈍化無縫鋼管現貨直供

　　廣東Q355B無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)用(yong)(yong)(yong)(yong)(yong)(yong)途：1、輸送(song)流(liu)體用(yong)(yong)(yong)(yong)(yong)(yong)：消防噴(pen)淋、供水(shui)、輸送(song)流(liu)體、冷(leng)(leng)熱循環水(shui)等；2、結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)：作結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)(鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、螺(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、廣東無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、鍋爐結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)(廣東無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、螺(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、橋(qiao)梁結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)、機(ji)(ji)械結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)(螺(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、直縫(feng)(feng)(feng)(feng)焊管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))、結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、彈簧(huang)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(彈簧(huang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)件(jian)、盤(pan)形彈簧(huang)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)、盤(pan)形彈簧(huang)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan))；；3、機(ji)(ji)械結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、彈簧(huang)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)、耐熱鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)、石油鉆桿用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)、耐腐蝕(shi)結(jie)(jie)(jie)構(gou)用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)；4、管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)道用(yong)(yong)(yong)(yong)(yong)(yong)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)。q4355b無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)力(li)學(xue)(xue)性(xing)(xing)(xing)能(neng)(neng)，抗拉(la)強(qiang)(qiang)度470～630Mpa，伸(shen)長率≥22％，屈服強(qiang)(qiang)度355Mpa，沖擊(ji)功≥34J，許用(yong)(yong)(yong)(yong)(yong)(yong)拉(la)應力(li)172.5。Q355b是(shi)(shi)以(yi)(yi)屈服強(qiang)(qiang)度命名的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)號(hao)(hao)，保(bao)證(zheng)化學(xue)(xue)成(cheng)(cheng)分(fen)(fen)，保(bao)證(zheng)機(ji)(ji)械性(xing)(xing)(xing)能(neng)(neng)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)廠出廠做0度沖擊(ji)試(shi)驗(yan)，做180度冷(leng)(leng)彎試(shi)驗(yan)，是(shi)(shi)高(gao)(gao)(gao)(gao)強(qiang)(qiang)度碳素鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)，用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)受(shou)力(li)部件(jian)。 　　Q355鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)是(shi)(shi)一種中(zhong)(zhong)國低(di)合(he)金(jin)(jin)高(gao)(gao)(gao)(gao)強(qiang)(qiang)度結(jie)(jie)(jie)構(gou)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)，替(ti)代了Q345，材(cai)(cai)料密度為(wei)7.85 g / cm3。根據GB / T 1591-2018，Q355具(ju)(ju)(ju)有(you)(you)3個質量等級：Q355B，Q355C和(he)(he)(he)Q355D。“ Q”是(shi)(shi)漢語拼音的(de)(de)(de)(de)第＊個字母，表示屈服強(qiang)(qiang)度，“ 355”是(shi)(shi)指鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)厚(hou)≤16mm時(shi)(shi)屈服強(qiang)(qiang)度的(de)(de)(de)(de)＊小值355 MPa，抗拉(la)強(qiang)(qiang)度為(wei)470-630 Mpa。 　　Q355鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)具(ju)(ju)(ju)有(you)(you)良(liang)好(hao)(hao)的(de)(de)(de)(de)機(ji)(ji)械性(xing)(xing)(xing)能(neng)(neng)，良(liang)好(hao)(hao)的(de)(de)(de)(de)焊接性(xing)(xing)(xing)，冷(leng)(leng)熱加工性(xing)(xing)(xing)能(neng)(neng)和(he)(he)(he)耐腐蝕(shi)性(xing)(xing)(xing)。可用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)制造船舶(bo)，鍋爐，壓(ya)(ya)力(li)容器，石油儲罐，橋(qiao)梁，電站設(she)備，起重(zhong)(zhong)運(yun)輸機(ji)(ji)械和(he)(he)(he)其(qi)(qi)他較(jiao)(jiao)高(gao)(gao)(gao)(gao)負(fu)荷的(de)(de)(de)(de)焊接結(jie)(jie)(jie)構(gou)件(jian)。 　　1.鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按化學(xue)(xue)成(cheng)(cheng)分(fen)(fen)可分(fen)(fen)為(wei)普通鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)合(he)金(jin)(jin)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　普通8162標準鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)化學(xue)(xue)成(cheng)(cheng)分(fen)(fen)較(jiao)(jiao)高(gao)(gao)(gao)(gao)，機(ji)(ji)械性(xing)(xing)(xing)能(neng)(neng)和(he)(he)(he)力(li)學(xue)(xue)性(xing)(xing)(xing)能(neng)(neng)好(hao)(hao)；通常(chang)(chang)用(yong)(yong)(yong)(yong)(yong)(yong)熱軋或冷(leng)(leng)拔制成(cheng)(cheng)的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。它們的(de)(de)(de)(de)機(ji)(ji)械性(xing)(xing)(xing)能(neng)(neng)較(jiao)(jiao)高(gao)(gao)(gao)(gao)，但(dan)不(bu)(bu)適于(yu)作流(liu)體輸送(song)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)結(jie)(jie)(jie)構(gou)件(jian)。因此(ci)(ci)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)(zai)(zai)一些領域不(bu)(bu)能(neng)(neng)完(wan)全(quan)替(ti)代8163無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。由于(yu)它具(ju)(ju)(ju)有(you)(you)較(jiao)(jiao)高(gao)(gao)(gao)(gao)的(de)(de)(de)(de)機(ji)(ji)械強(qiang)(qiang)度、較(jiao)(jiao)好(hao)(hao)的(de)(de)(de)(de)耐腐蝕(shi)性(xing)(xing)(xing)和(he)(he)(he)良(liang)好(hao)(hao)的(de)(de)(de)(de)耐陰極剝離性(xing)(xing)(xing)，已被(bei)廣泛用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)制造結(jie)(jie)(jie)構(gou)件(jian)。但(dan)是(shi)(shi)隨(sui)著鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)技(ji)術(shu)(shu)的(de)(de)(de)(de)發展以(yi)(yi)及(ji)(ji)人(ren)們對(dui)質量和(he)(he)(he)的(de)(de)(de)(de)日益重(zhong)(zhong)視，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)生(sheng)(sheng)產(chan)(chan)技(ji)術(shu)(shu)也在(zai)(zai)(zai)不(bu)(bu)斷進(jin)(jin)步和(he)(he)(he)發展。 　　2.按照外(wai)(wai)徑不(bu)(bu)同可分(fen)(fen)為(wei)Φ12-Φ1020其(qi)(qi)中(zhong)(zhong)Φ30以(yi)(yi)下(xia)為(wei)小口徑無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，大(da)口徑無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)通常(chang)(chang)用(yong)(yong)(yong)(yong)(yong)(yong)熱軋及(ji)(ji)熱擴(kuo)、擠(ji)(ji)壓(ya)(ya)制造。 　　鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)通常(chang)(chang)分(fen)(fen)為(wei)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)有(you)(you)螺(luo)旋(xuan)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、直縫(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)等幾種，不(bu)(bu)同的(de)(de)(de)(de)規格型(xing)號(hao)(hao)會(hui)導致其(qi)(qi)生(sheng)(sheng)產(chan)(chan)過(guo)程中(zhong)(zhong)的(de)(de)(de)(de)要(yao)求不(bu)(bu)同，也會(hui)導致生(sheng)(sheng)產(chan)(chan)成(cheng)(cheng)本不(bu)(bu)同。通常(chang)(chang)情(qing)況下(xia)，人(ren)們會(hui)根據材(cai)(cai)質要(yao)求以(yi)(yi)及(ji)(ji)生(sheng)(sheng)產(chan)(chan)的(de)(de)(de)(de)工藝(yi)等來選(xuan)擇適合(he)的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)型(xing)號(hao)(hao)進(jin)(jin)行(xing)生(sheng)(sheng)產(chan)(chan)。當然(ran)了，作為(wei)一種鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)材(cai)(cai)，它不(bu)(bu)僅要(yao)有(you)(you)好(hao)(hao)的(de)(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)以(yi)(yi)及(ji)(ji)高(gao)(gao)(gao)(gao)級別(bie)的(de)(de)(de)(de)用(yong)(yong)(yong)(yong)(yong)(yong)途，也要(yao)在(zai)(zai)(zai)生(sheng)(sheng)產(chan)(chan)的(de)(de)(de)(de)時(shi)(shi)候(hou)做到(dao)(dao)生(sheng)(sheng)產(chan)(chan)工藝(yi)合(he)理(li)以(yi)(yi)及(ji)(ji)生(sheng)(sheng)產(chan)(chan)技(ji)術(shu)(shu)先進(jin)(jin)。除此(ci)(ci)之(zhi)外(wai)(wai)，在(zai)(zai)(zai)使用(yong)(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)時(shi)(shi)候(hou)，也要(yao)做到(dao)(dao)合(he)理(li)的(de)(de)(de)(de)使用(yong)(yong)(yong)(yong)(yong)(yong)。客戶在(zai)(zai)(zai)設(she)計選(xuan)購(gou)的(de)(de)(de)(de)時(shi)(shi)候(hou)，一定要(yao)選(xuan)擇合(he)適的(de)(de)(de)(de)材(cai)(cai)質與種類。下(xia)面為(wei)大(da)家(jia)介紹一下(xia)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠家(jia)生(sheng)(sheng)產(chan)(chan)工藝(yi)和(he)(he)(he)常(chang)(chang)見問(wen)題(ti)及(ji)(ji)解(jie)決辦法。 　　3.按斷面形式可分(fen)(fen)為(wei)圓形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)異形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　圓形管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)坯(pi)加熱到(dao)(dao)一定溫度，在(zai)(zai)(zai)定徑機(ji)(ji)上(shang)進(jin)(jin)行(xing)定徑。成(cheng)(cheng)型(xing)后的(de)(de)(de)(de)圓形鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)坯(pi)沿直線運(yun)動。在(zai)(zai)(zai)圓周上(shang)劃一刀(dao)，然(ran)后從(cong)邊緣向(xiang)中(zhong)(zhong)心方(fang)(fang)向(xiang)旋(xuan)轉，并在(zai)(zai)(zai)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)上(shang)留下(xia)一條圓形溝(gou)槽(cao)。鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)旋(xuan)轉方(fang)(fang)向(xiang)是(shi)(shi)沿著溝(gou)槽(cao)的(de)(de)(de)(de)圓周方(fang)(fang)向(xiang)前(qian)進(jin)(jin)。當金(jin)(jin)屬擠(ji)(ji)壓(ya)(ya)到(dao)(dao)溝(gou)槽(cao)中(zhong)(zhong)時(shi)(shi)，被(bei)擠(ji)(ji)壓(ya)(ya)的(de)(de)(de)(de)金(jin)(jin)屬就會(hui)沿著溝(gou)槽(cao)繼續前(qian)進(jin)(jin)，直至將原來金(jin)(jin)屬擠(ji)(ji)壓(ya)(ya)成(cheng)(cheng)圓形狀(zhuang)態。 　　4.水(shui)壓(ya)(ya)試(shi)驗(yan)、擠(ji)(ji)壓(ya)(ya)、彎曲等普通熱軋無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)(zai)(zai)普通圓管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)坯(pi)中(zhong)(zhong)送(song)入(ru)橫軋裝置，由擠(ji)(ji)壓(ya)(ya)輥兩端向(xiang)內壓(ya)(ya)入(ru)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)(cai)，擠(ji)(ji)壓(ya)(ya)成(cheng)(cheng)圓形或方(fang)(fang)形鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 　　在(zai)(zai)(zai)此(ci)(ci)過(guo)程中(zhong)(zhong)，鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)中(zhong)(zhong)產(chan)(chan)生(sheng)(sheng)的(de)(de)(de)(de)微細氣(qi)泡，對(dui)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)帶的(de)(de)(de)(de)附著力(li)、焊縫(feng)(feng)(feng)(feng)處(chu)的(de)(de)(de)(de)力(li)學(xue)(xue)性(xing)(xing)(xing)能(neng)(neng)和(he)(he)(he)表面質量都產(chan)(chan)生(sheng)(sheng)了影響。若氣(qi)泡過(guo)大(da)，則(ze)擠(ji)(ji)壓(ya)(ya)輥容易卡(ka)死。一般擠(ji)(ji)壓(ya)(ya)輥對(dui)輥的(de)(de)(de)(de)壓(ya)(ya)下(xia)量為(wei)0.3——0.5 MPa (國標中(zhong)(zhong)對(dui)輥壓(ya)(ya)下(xia)量為(wei)0.2 MPa-0.5 MPa)且(qie)擠(ji)(ji)壓(ya)(ya)輥和(he)(he)(he)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)之(zhi)間(jian)的(de)(de)(de)(de)距離不(bu)(bu)宜太大(da)，以(yi)(yi)保(bao)證(zheng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)壁厚(hou)均勻，且(qie)擠(ji)(ji)壓(ya)(ya)輥壓(ya)(ya)力(li)過(guo)高(gao)(gao)(gao)(gao)造成(cheng)(cheng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)損傷嚴重(zhong)(zhong)。

　　厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)的(de)(de)(de)(de)(de)(de)(de)防(fang)腐(fu)(fu)工(gong)作(zuo)? 　　厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)的(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)般應(ying)(ying)(ying)用(yong)必(bi)須做相應(ying)(ying)(ying)的(de)(de)(de)(de)(de)(de)(de)防(fang)腐(fu)(fu)防(fang)銹處(chu)理(li)工(gong)作(zuo)，一(yi)(yi)般防(fang)腐(fu)(fu)工(gong)作(zuo)分為(wei)三(san)個過(guo)(guo)程(cheng)，下(xia)面(mian)(mian)我為(wei)您詳細(xi)說明： 　　1.管(guan)道防(fang)銹處(chu)理(li)。 　　涂(tu)漆(qi)(qi)(qi)前(qian)，管(guan)道表(biao)面(mian)(mian)應(ying)(ying)(ying)油(you)(you)污.爐渣(zha).銹跡.鋅灰。產(chan)品質(zhi)量標(biao)準(zhun)為(wei)Sa2.5級。 　　2.管(guan)道表(biao)面(mian)(mian)防(fang)銹處(chu)理(li)后(hou)，涂(tu)面(mian)(mian)漆(qi)(qi)(qi)，中(zhong)間間隔(ge)時(shi)(shi)間不超(chao)(chao)過(guo)(guo)8小時(shi)(shi)。涂(tu)面(mian)(mian)漆(qi)(qi)(qi)時(shi)(shi)，基(ji)準(zhun)表(biao)面(mian)(mian)應(ying)(ying)(ying)干燥(zao)易怒。面(mian)(mian)漆(qi)(qi)(qi)應(ying)(ying)(ying)均勻(yun)、圓(yuan)潤，無(wu)凝塊(kuai)和(he)氣泡。管(guan)道兩側不得在(zai)150~250mm范圍(wei)內(nei)刷涂(tu)。 　　3.面(mian)(mian)漆(qi)(qi)(qi)干固后(hou)，涂(tu)上油(you)(you)漆(qi)(qi)(qi)并捆扎玻璃(li)纖(xian)維布，面(mian)(mian)漆(qi)(qi)(qi)與油(you)(you)漆(qi)(qi)(qi)之間的(de)(de)(de)(de)(de)(de)(de)間隔(ge)不超(chao)(chao)過(guo)(guo)24小時(shi)(shi)。 　　厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)在(zai)整(zheng)個應(ying)(ying)(ying)用(yong)過(guo)(guo)程(cheng)中(zhong)，表(biao)面(mian)(mian)有時(shi)(shi)會遇(yu)到橫(heng)裂(lie)的(de)(de)(de)(de)(de)(de)(de)情況，造成這種情況的(de)(de)(de)(de)(de)(de)(de)原因(yin)有很多，下(xia)面(mian)(mian)我給大(da)家做一(yi)(yi)個詳細(xi)的(de)(de)(de)(de)(de)(de)(de)分析。 　　如果厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)在(zai)整(zheng)個空拔(ba)過(guo)(guo)程(cheng)中(zhong)變形(xing)較小，內(nei)外(wai)(wai)表(biao)面(mian)(mian)會引(yin)起(qi)壓力(li)(li)(li)內(nei)拉(la)的(de)(de)(de)(de)(de)(de)(de)額(e)(e)外(wai)(wai)應(ying)(ying)(ying)力(li)(li)(li)。此(ci)時(shi)(shi)，由(you)于變形(xing)滲透性(xing)(xing)差，外(wai)(wai)表(biao)面(mian)(mian)擴張的(de)(de)(de)(de)(de)(de)(de)發展(zhan)趨勢大(da)于內(nei)層，因(yin)此(ci)外(wai)(wai)表(biao)面(mian)(mian)會引(yin)起(qi)額(e)(e)外(wai)(wai)的(de)(de)(de)(de)(de)(de)(de)壓力(li)(li)(li)應(ying)(ying)(ying)力(li)(li)(li)，內(nei)表(biao)面(mian)(mian)會引(yin)起(qi)額(e)(e)外(wai)(wai)的(de)(de)(de)(de)(de)(de)(de)拉(la)應(ying)(ying)(ying)力(li)(li)(li)。如果內(nei)表(biao)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)額(e)(e)外(wai)(wai)拉(la)應(ying)(ying)(ying)力(li)(li)(li)影(ying)響很大(da)，基(ji)本上拉(la)應(ying)(ying)(ying)力(li)(li)(li)和(he)額(e)(e)外(wai)(wai)進行(xing)應(ying)(ying)(ying)力(li)(li)(li)可以加(jia)(jia)在(zai)我們一(yi)(yi)起(qi)，會超(chao)(chao)過(guo)(guo)厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)的(de)(de)(de)(de)(de)(de)(de)抗壓強度(du)，導致內(nei)表(biao)面(mian)(mian)水平開裂(lie)。 　　在(zai)相應(ying)(ying)(ying)的(de)(de)(de)(de)(de)(de)(de)結(jie)構力(li)(li)(li)學標(biao)準(zhun)下(xia)，減少厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)生產(chan)加(jia)(jia)工(gong)過(guo)(guo)程(cheng)中(zhong)塑性(xing)(xing)變形(xing)的(de)(de)(de)(de)(de)(de)(de)各種因(yin)素將提高內(nei)橫(heng)裂(lie)的(de)(de)(de)(de)(de)(de)(de)機會。因(yin)此(ci)，在(zai)生產(chan)厚(hou)(hou)(hou)壁(bi)無(wu)縫(feng)鋼(gang)(gang)管(guan)時(shi)(shi)，淬火質(zhi)量。去除堿性(xing)(xing)脆性(xing)(xing)非常重(zhong)要(yao)。 　　在(zai)整(zheng)個空拔(ba)過(guo)(guo)程(cheng)中(zhong)，除了額(e)(e)外(wai)(wai)的(de)(de)(de)(de)(de)(de)(de)徑向應(ying)(ying)(ying)力(li)(li)(li)外(wai)(wai)，還有額(e)(e)外(wai)(wai)的(de)(de)(de)(de)(de)(de)(de)徑向應(ying)(ying)(ying)力(li)(li)(li)。縱向裂(lie)紋是由(you)空拔(ba)過(guo)(guo)程(cheng)中(zhong)引(yin)起(qi)的(de)(de)(de)(de)(de)(de)(de)額(e)(e)外(wai)(wai)徑向拉(la)應(ying)(ying)(ying)力(li)(li)(li)引(yin)起(qi)的(de)(de)(de)(de)(de)(de)(de)。